“ALCOHOL DETECTION AND CAR IGNITION LOCKING ...

VISVESWARAYA TECHNOLOGICAL UNIVERSITY, BELAGAVI

A PROJECT REPORT

on

“ALCOHOL DETECTION AND CAR

IGNITION LOCKING SYSTEM”

Submitted in Partial fulfillment as a requirement for the award of degree of

BACHELOR OF ENGINEERING

IN ELECTRONICS AND COMMUNICATION ENGINEERING

For the Academic Year: 2018-2019

SUBMITTED BY,

S. SUHAS 1NH15EC084

NAMRATHA B.R 1NH15EC133

SANJEEV JAYASURYA. S 1NH15EC092

UNDER THE GUIDANCE

of

DR. PRIYAMVADA

Associate Professor

Department of Electronics and Communication Engineering

NEW HORIZON COLLEGE OF ENGINEERING,

BENGALURU

VISVESWARAYA TECHNOLOGICAL UNIVERSITY, BELAGAVI

DEPARTMENT OF ELECTRONICS AND COMMUNICATION

ENGINEERING

CERTIFICATE

Certified that the project work entitled “ALCOHOL DETECTION AND CAR

IGNITION LOCKING SYSTEM” carried out by S SUHAS (1NH15EC084),

NAMRATHA B R (1NH15EC133), SANJEEV JAYASURYA S

(1NH15EC092),bonafide students of NEW HORIZON COLLEGE OF

ENGINEERING, BENGALURU in partial fulfillment for the award of Bachelor of

Engineering in VIII Semester of the Visveswaraiah Technological University, Belgaum

during the year 2018-2019. It is certified that all corrections/suggestions indicated for

Internal Assessment have been incorporatedin the Report deposited in the department

library.

The project report has been approved as it satisfies the academic requirements in respect

of Project work prescribed for the Degree.

GUIDE

HOD

PRINCIPAL

Dr. Priyamvada Dr. Sanjeev Sharma

Dr. Manjunatha

External Viva

NAME OF THE EXAMINER SIGN WITH DATE

1.

2.

ACKNOWLEDGEMENT

We wish to express our profound gratitude to our respected Chairman Dr. Mohan

Maghnani, for providing all the facilities in the college and respected Principal, Dr.

Manjunatha for his constant support. We would like to express our sincere thanks to

Dr. Sanjeev Sharma, Head of the department of Electronics and Communication

Engineering for his continuous support and encouragement. We feel deeply indebted

to our esteemed Project Coordinator, Mrs. Reema Sharma and our Guide Dr.

Priyamvada for their guidance, right from the conception and visualization to the

very presentation of the project. They have been our guiding light throughout. We

are greatly indebted to our faculties, both teaching and supporting staff, Department

of Electronics and Communication Engineering, who took great interest in our project

work. They motivated and guided us throughout the accomplishment of this goal. We

express our profound thanks for their meticulous guidance. Finally, we would like to

express our heartfelt thanks to our beloved parents for their blessings, our friends for

their help and wishes for the successful completion of this project work.

S. Suhas Namratha B.R Sanjeev Jayasurya. S

(1NH15EC084) (1NH15EC133) (1NH15EC092)

DECLARATION

We, S Suhas, Namratha B R, Sanjeev Jayasurya S, students of B.E in Electronics and

Communication Engineering at New Horizon College of Engineering, Bangalore,

hereby declare that this project work entitled “Alcohol Detection and Car Ignition

Locking System”, is an original and bonafide work carried out by us during the

academic year 2018-19.

We also declare that, to the best of our knowledge, the work reported here is not

from any other thesis or dissertation on the basis of which the degree or award was

conferred on an earlier occasion by any student.

ABSTRACT

This system is aimed at making vehicle driving safer than before. The main purpose behind this

project is “Drunken driving detection”. Now days, many accidents are happening because of the

alcohol consumption of the driver or the person who is driving the vehicle. Thus, drunk driving is a

major reason of accidents in almost all countries all over the world. We have proposed the

detection of alcohol using alcohol detector connected to ARM such that when the level of alcohol

crosses a permissible limit, the vehicle ignition system will turn off. Alcohol Detector in Car project is

designed for the safety of the people seating inside the car. Alcohol breath analyzer project should

be fitted / installed inside the vehicle. And there is auto theft detection of the system is also added

which will detect whether the system is present or not in the car. If any of these conditions match

then the concerned person will get a msg through GSM along with GPS coordinates.

TABLE OF CONTENTS

Title Page

1.INTRODUCTION

1.1 Objective 1

1.2 Problem Statement 5

1.3 Objective 5

1.4 Proposed system 6

1.5 Literature Survey 6

2. SYSTEM DESCRIPTION, CONSTRUCTION

AND OPERATION

2.1 System Overview 7

2.2 Component Specification 7

2.2.1 ARM-7 Micro Controller 8

2.2.1.1 About ARM 8

2.2.1.2 Features of LPC214x Series Controllers 11

2.2.2 DC Motor 12

2.2.2.1 DC Motor Principle 12

2.2.2.2 Working of DC Motor 13

2.2.3 Global System for Mobile (GSM) 14

2.2.3.1 GSM Transmission Structure 15

2.2.3.2 GSM System Architecture 16

2.2.4 Liquid Crystal Display (LCD) 18

2.2.4.1 Pin Diagram 18

2.2.4.2 Pin Description 19

2.2.4.3 Block Diagram of LCD Display 19

2.2.4.4 Control and Display Commands 20

2.2.4.5 Address Counter (AC) 22

2.2.4.6 8-Bit Mode 29

2.2.4.7 4-Bit Mode 30

2.2.4.8 LCD Display Interfacing – Flowchart 30

2.2.5 GPS (Global Positioning System) 31

2.2.5.1 Segments of GPS 32

2.2.5.2 Applications of GPS 33

2.2.6 Relay 34

2.2.6.1 Port Description 35

2.2.6.2 Working of Relay 36

2.2.6.3 Types of Relay 36

2.2.7 Alcohol Sensor (MQ-3 Sensor) 38

2.2.7.1 Block Diagram 39

2.2.7.2 Basic Pin Configuration 39

2.2.7.3 Working Principle 40

2.2.7.4 Features 40

2.3 Flow-Chart 41

3. SOFTWARE SPECIFICATIONS

3.1 About Keil Uvision 42

3.2 ARM-7 Highlights 43

3.3 ARM-7 Development Tool Support 43

4. RESULTS

4.1 Alcohol Detection Output 44

4.2 Switch Output 45

5. Conclusion and Future Scope

5.1 Conclusion 46

5.2 Future Scope 46

References 47

Appendix 48

DEPARTMENT OF ELECTRONICS AND COMMUNICATION 1

CHAPTER 1

INTRODUCTION

1.1 Brief Overview

Driving under the influence of alcohol continues to be one of the nation’s most

serious problem faced by the general public. It is a known fact that under the

influence of alcohol the driving skills is impaired and the risk of involvement in

accidents increases exponentially.

One study estimates that eliminating alcohol would reduce traffic fatalities by 47

percent (± 4%), equivalent to a reduction of between 20,000 and 24,000 fatalities

annually. There is no doubt that a reduction in alcohol-impaired driving would result

in a substantial savings of human lives and resources, worldwide.

India had earned the questionable qualification of having a greater number of

fatalities because of street mishaps on the society. Street wellbeing is rising as a

noteworthy social worry far and wide, particularly in India. Drinking and driving is as

of now a genuine general medical issue, which is probably going to rise as a standout

amongst the most critical issues sooner rather than later. The primary reason behind

this task is "Drunk driving detection". Since numerous mishaps are increasing due to

the liquor utilization of the driver or the individual who is driving the vehicle.

Subsequently Drunk driving is a noteworthy reason of mischances in all nations

everywhere throughout the world. Thus, the framework diminishes the quantum of

street mischances and fatalities because of drunk driving in future.

Drunk driving is the purpose for the vast majority of the deaths, Since the Drunk

Driving Detection and Car Ignition Locking Using Arduino intends to change that with

mechanized, straightforward, noninvasive liquor wellbeing check in vehicles. Alcohol

sensor is implanted on the steering of the car, to such an extent that when the level

of liquor crosses an admissible breaking point, where the start of vehicle will

stopignition and the motor will stop. The Arduino processor always uses the liquor


sensor information to check drunk driving and works a bolt on the vehicle. In 2009

alone, more than 10,000 activity fatalities were connected directly to drivers who

had more blood alcohol level as permitted. Numerous accidents occur because of

the carelessness with respect to driver. Numerous drivers drink and drive which is a

criminal offense. Such drivers are a danger to society and ought to be captured

rapidly. Despite the fact that the nation has laws to check drunken driving yet its

viable usage is still to be worked upon and at times even questionable. For such

reason we are outlining a framework to decide if he/she is fit to drive or not.

This framework is fundamentally an Embedded System which is mix of both

programming and equipment which can play out some particular capacities. There

are developing worry about the quantity of mischance caused by a man who driving

vehicles particularly during drunken. Statistic demonstrate the accident caused by

drunken drivers expanded every year. As indicated by the Insurance Information

Institute, 16,068 individuals were killed in 2000 in liquor related engine vehicle

crashes, a 1.8 percent expansion more than 1999, and alcohol keeps on being a

factor in 38 percent of all traffic fatalities. Everything hasbeen identified with level of

alcohol in the blood after they drunk. Blood Alcohol Content (BAC) is typically

communicated as a level of alcohol in the blood.

High BAC of the drunken driver will influence their practices likes obviousness,

passionate swings, and outrage or bitterness. There is the exploration about Blood

Alcohol Concentration and with 0.2mg/l or more, (estimated in mg of 1 liquor for

each 100ml of blood, or mg/l) the judgment, coordination and tangible discernment

are impeded, response time moderates, execution in scholarly tests falls, and vision

is debilitated. So, there is a requirement for an effective framework to check

drunken drivers and this drunk driving detection using car ignition locking task can

be one of the strategies to decrease this issue or more particular to keepawaythe

drunken driver itself to driving the vehicles.

Consistently, 40 individuals which underneath the age of 25 die due to highway

accidents. What's more, as per the world fitness association, car crashes caused an


around 1.24 million deaths within the year 2010, somewhat down from 1.26 million

in 2000. That is one individual is passed on for at regular intervals. Just 28 global

areas, speaking to 449 million individuals (7% of the total population), have

allaroundlegitimate rules that adapt to each of the five threat components. The five

perils components for street mischances are pace, drink–utilizing, protective caps,

safety belts andtyke restraints. Over a third piece of road site visitors dying are

inlow-and center income nations are among walkers and cyclists.

However, under 35% of low and focus profit countries have directions in zone to

monitor those street clients. The vital point of this gadget is to avoid the charge

mischances which can be generally happened because of drunkenness of driving

power. This gadget discovers the drunkenness of driving power and spare the

passengersfrom riding, so this attempt to give one type of security or insurance to

driving power and spare remain. The principle expectation of this framework is to

maintain a strategic distance from the rate of accidents which are ordinarily

occurred duetodrunkenness of driver.This framework identifies the drunkenness of

driver and keep them from driving, so this framework will try to give one kind of

security or wellbeing system to driver and spare lives.

Alcohol influences the focal sensory system of a man. Indeed, even 0.05% BAC

understands judgment disabled and the capacity to control directing is influenced. In

this paper we havecomposed a programmed alcohol detector which is coordinated

with the steering wheel. This workidentifies with mechanical assembly to prevent a

motorcar from being driven by a drunk driver. At the point when the sensor

distinguishes nearness of alcohol in the breath of the driver, car is bolted

automatically. "Drinking is not just damaging to drunken driver it likewise influences

the encompassing zone and individuals."

Nowadays street accidents are real issue everywhere throughout the world. As

report by WHO (World Health Organization) in its first Global status report (2014)

80,000 of Indian individuals are died on streets due to finished speeding, drunk

driving and different reasons. Drunk driving is a central point for ascent of deaths on


streets. Drink and drive not just convey street dangers to others, yet in addition

influences the wellbeing of his own life. The greater part of the mischances is

happening outside the urban areas because of the drunk driving. In India consistently

auto collision is causedby drunkdriving. Around3 thousand deathsand more than 6

thousand are wounded in a year and its expanding quickly.

Other Wide zones of drunk fatalities are suicides, unmanned railroad crossing,

fundamental city activity. The greater part of nowadays, we hear lot of accidents

because of drunken driving. Drunken drivers won't be in stable condition thus the

rash driving is the burden for other road users and furthermore question of life and

death for the drunken driver and for others. The principle reason behind this project

is "Drunk driving detection". Presently, numerous accidents are occurring a direct

result of the liquor utilization of the driver or the individual who is driving the

vehicle. In this way Drunk driving is a noteworthy reason of mishaps in all nations

everywhere throughout the world.

Alcohol Detector in Car is intended for the safety of the general population seating

inside the car. This project ought to be fitted/introduced inside the vehicle.Alcohol

sensor will be appended withArduino. While liquor isnoticed by the sensor, sensor

sends the input voltage to Arduino. On the off chance that there are any hints of

Alcohol over as far as possible, at that point the framework will lock the Engine in

the meantime will automatically give a buzzer, we can reducethe accidents by

checking the driving individuals on the roads. Drunk driving is one of the intense

national and worldwide street security issue.

Despite the fact that driving under the drunken condition is illegal and punishable in

relatively every nation, and still, at the end of the day numerous people/youths,

break the guidelines and feel eager to drink and drive. The fundamental thought

spins around the idea -Why not make the vehicle sufficiently keen to check the drunk

condition of the driver and take alarming and preventive activities previously any

incident on street? This paper examines the plan, improvement and in-vehicle

testing of the proposed drunk driver detection and modifying system.The work is


finished with the intend to expand the wellbeing component of smart vehicles by

installing a dependable drink and drive circumstance detection gadget in the steering

wheel of the vehicle that consequently recognizes the alcohol content in the exhaled

breath of the driver and shows the alarming drunk condition of the driver.

1.2 Problem Statement

Drunken driving is the major cause of road accidents worldwide becausedriving

under the influence of alcohol reduces the driver’s perception and vehicle control.

Manual checking of alcohol using breath analyzer is done by the police in order to

reduce the problem. But, this method has very less effect as it is not possible to

check if every driver is driving under the influence of alcohol.

1.3 Objective

The target of this projectis to give an ideaand inventive method for avoiding drunken

driving of a Motorcar by locking the car. Likewise, to permita man who is not

alcoholic to drive a same Motorcar. To broaden this thought with more innovative

headways and make it accessible in a financially effective way. We need to plan a sort

of framework which can recognize the alcohol content in the cars to prevent the

conduct of alcoholic driving.

The sensor will be fixed close to the driver's seat. The driver should breath to the

system before the individual begins the car. On the off chance that the alcohol level

identified is underneath the permissible standard, the car can be started regularly. In

the event that the alcohol level is over the suitable standard, the framework will send

caution to the driver through LCD display. The framework ought to be protected,

delicate, exact, advantageous and cheap. This sort of framework can be fixed on each

car to guarantee the driver's driving security.


1.4 Proposed System

The system uses ARM-7 (LPC2148) micro controller as the heart of the system. An

Alcohol sensor (MQ-3) is made use, which on sensing high Blood Alcohol Content

(BAC) locks the Car Ignition, thus making the driver unable to start the engine under

the influence of alcohol. An LCD is used to indicate the detection of alcohol. A GSM

Module is used to send an alert message along with the co-ordinates obtained from

the GPS module to the concerned authorities as well as friends and family. A switch is

also installed along with the system in order to ensure the system is not removed

from the car by the user. In the case of any tampering with the switch, an alert

message along with co-ordinates will be sent to the concerned authorities and strict

action can be taken. This is done to ensure maximum safety of the driver.

1.5 Literature Survey

[1] Z. Xiaoronget proposed a model for automatic alcohol detection based on using

alcohol sensor MQ-3 and IOT. He used STC12C516A microcontroller and MQ3 sensor

as primary components for detection.

[2] Another method was relied on MQ-135 gas sensor for alcohol detection and

stopping vehicle ignition.

[3] Special Sensors were used in a research to detect the physiological behavior such

as changes in heart rate, change in the eye blinking pattern, drowsiness using Facial

Detection and Eye Recognition Cameras.

[4] In a research, the GPS location was given in terms of latitude and longitude. The

vehicle would stop after alcohol detection.


CHAPTER 2

SYSTEM DESCRIPTION, CONSTRUCTION AND

OPERATION

2.1 System Overview

Fig. 2.1 Block Diagram of the System

Theblock diagram explains the concept of alcohol detection and ignition locking

system. Here lpc2148 is used as the heart of the project. MQ3 sensor is used for

detection of alcohol. If the concerned person is drunk then the ignition system will

not be activated. Another feature of this system is the auto theft detection if any one

tries to steal /deactivate the system then a message is sent to the concerned person

with GPS. The vehicle is shown in the form of a DC motor.

2.2 Component Specification

Standard off the shelf components have been used in this SLDS project. This section

describes each component used in detail.

Switch


2.2.1 ARM Micro-Controller

ARM-Advanced RISC Machine is a 32-bitRISC (Reduced Instruction Set

Computer) processor architecture developed by ARM Holdings. Many beginners

sometimes misunderstood that the ARM is microcontroller or processor but in

reality,

ARM is an architecture which is used in many processors and microcontrollers. The

ARM architecture licensed to companies that want to manufacture ARM-based CPUs

or System-on-Chip products. This enables the companies to develop their own

processors compliant with the ARM instruction set architecture. For example, the

device we are using LPC2148 is ARM architecture based SOC product developed by

NXP Semiconductor.

The Pipeline method is used for processing all the blocks in architecture. A single

instruction set is being performed, then its descendant is being translated, & a 3rd-

instruction is being obtained from the memory.

An exclusive architectural plan of ARM7 is called as Thumb, and it is perfectly

suitable for high volume applications where the compactness of code is a matter. It

makes it perfectly suitable for different applications by memory limitations where

the density of code is a matter.

Fig. 2.2.1 LPC2148 with LCD Display

2.2.1.1 About ARM

ARM7 is most successful and widely used processor family in embedded system

applications. So, we have decided to choose ARM7 TDMI based NXP


controllerLPC2148. Also, ARM7 is a balance between classic and new Cortex series.

ARM7 is excellent to get start with in terms of resources available on internet and

quality documentation provided by NXP. It suits perfectly for beginners to get in-

depth idea about hardware and software implementation.

LPC2148 is manufactured by NXP Semiconductor (Phillips) and it is preloaded with

many in-built features and peripherals. This makes it more efficient and reliable

choice for a high-end application developer. Now let’s have a look at pin diagram of

LPC2148. (Fig 2.1.1.1)

Fig 2.2.1.1LPC2148 Pin Diagram

http://www.binaryupdates.com/wp-content/uploads/lpc2148-pin-diagram.jpg


MEMORY

LPC2148 has 32kB on chip SRAM and 512kB on chip FLASH memory. This chip has

built in support up to 2kB end point USB RAM. This memory is more than enough for

almost all applications. Let’s understand the function of this huge memory space in

LPC2148.

FLASH Memory System: The LPC2148 has 512kB flash memory. This memory

maybeused for both code and data storage. The flash memory can be programmed

by various ways

Using serial built in JTAG Interface

Using In-System Programming (ISP)

By means of In-Application Programming (IAP) capabilities

The application program, using IAP functions may also erase and/or program the

FLASH while the application is running. When the LPC2148 on chip bootloader is

used, 500kB of flash memory is available for user code.

RAM Memory System: LPC2148 provides 32kB of static RAM which may be used for

code and/or data storage. It may be accessed as 8-bit, 16-bit and 32-bits.

GPIO- General Purpose Input/output

GPIO registers control the device pins which are not linked to a particular peripheral

function. The device pins can be arranged as i/p[s or o/ps. Individual registers allow

for clearing any number of o/p’s concurrently. The output register value can be read

back, & the present condition of the port pins. These microcontrollers begin an

accelerated function over LPC200 devices.General purpose input/output registers

are moved to the processor bus used for the best probable I/O time.

These registers are addressable by bytes.

The total value of a port can be

The complete value of the port can be written in the only instruction


2.2.1.2 Features of LPC214x series controllers:

• 8 to 40 kB of on-chip static RAM and 32 to 512 kB of on-chip flash program

memory.128-bit wide interface/accelerator enables high speed 60 MHz operation.

• In-System/In-Application Programming (ISP/IAP) via on-chip boot-loader software.

Single flash sector or full chip erase in 400ms and programming of 256 bytes in 1ms.

• Embedded ICE RT and Embedded Trace interfaces offer real-time debugging with

theon-chip Real Monitor software and high-speed tracing of instruction execution.

• USB 2.0 Full Speed compliant Device Controller with 2 kB of endpoint RAM. In

addition, the LPC2146/8 provides 8 kB of on-chip RAM accessible to USB by DMA.

• One or two (LPC2141/2 vs. LPC2144/6/8) 10-bit A/D converters provide a total of

6/14analog inputs, with conversion times as low as 2.44 us per channel.

• Single 10-bit D/A converter provides variable analog output.

• Two 32-bit timers/external event counters (with four capture and four compare

channels each), PWM unit (six outputs) and watchdog.

• Low power real-time clock with independent power and dedicated 32 kHz clock

input.

• Multiple serial interfaces including two UARTs (16C550), two Fast I2C-bus (400

kbit/s), SPI and SSP with buffering and variable data length capabilities.

• Vectored interrupt controller with configurable priorities and vector addresses.

• Up to 45 of 5 V tolerant fast general purpose I/O pins in a tiny LQFP64 package.

• Up to nine edge or level sensitive external interrupt pins available.

• On-chip integrated oscillator operates with an external crystal in range from 1 MHz

to30 MHz and with an external oscillator up to 50 MHz

• Power saving modes include Idle and Power-down.

• Individual enable/disable of peripheral functions as well as peripheral clock scaling

for additional power optimization.

• Processor wake-up from Power-down mode via external interrupt, USB, Brown-Out

Detect (BOD) or Real-Time Clock (RTC).

• Single power supply chip with Power-On Reset (POR) and BOD circuits:

CPU operating voltage range of 3.0 V to 3.6 V (3.3 V ± 10 %) with 5 V tolerant I/O

pads.


2.2.2 DC Motor

A DC motor is any of a class of electrical machines that converts direct current

electrical power into mechanical power. The most common types rely on the forces

produced by magnetic fields. Nearly all types of DC motors have some internal

mechanism, either electromechanical or electronic, to periodically change the

direction of current flow in part of the motor. Most types produce rotary motion, a

linear motor directly produces force and motion in a straight line. The very

basic construction of a dc motor contains a current carrying armature which is

connected to the supply end through commutator segments and brushes and placed

within the north south poles of a permanent or an electro-magnet as shown in the

diagram below.(Fig 2.2.2)

Fig 2.2.2 DC Motor

2.2.2.1 DC Motor Principle

A machine that converts DC electrical power into mechanical power is known as a

Direct Current motor.

DC motor working is based on the principle that when a current carrying conductor is

placed in a magnetic field, the conductor experiences a mechanical force. The

direction of this force is given by Fleming’s left-hand rule and magnitude is given by;

F = BIL Newtons

http://www.electrical4u.com/construction-of-dc-motor-yoke-poles-armature-field-winding-commutator-brushes-of-dc-motor/

http://www.electrical4u.com/electric-current-and-theory-of-electricity/


According to Flemings left-hand rule when electric current passes through a coil in a

magnetic field, the magnetic force produces a torque which turns the DC motor.The

direction of this force is perpendicular to both the wire and the magnetic field.

2.2.2.2 Working of DC Motor

When the terminals of the motor are connected to an external source of DC

supply:the field magnets are excited developing alternate North and South poles and

the armature conductors carry currents.All conductors under North-pole carry

currents in one direction while all the conductors under South-pole carry currents in

the opposite direction. The armature conductors under N-pole carry currents into

the plane of the paper and the conductors under S-pole carry currents out of the

plane of paper. On applying Fleming’s left-hand rule, it is clear that force on each

conductor is tending to rotate the armature in the anticlockwise direction. All these

forces add together to produce a driving torque which sets the armature rotates.

When the conductor moves from one side of a brush to the other, the current in that

conductor is reversed. At the same time, it comes under the influence of the next

pole which is of opposite polarity. Also, the function of a commutator in the motor is

the same as in a generator.

Fig.2.2.2.2 Cross-section of DC Machine


2.2.3 Global System for Mobile (GSM)

GSM stands for Global System for Mobile Communications. It is a standard

set developed by the European Telecommunications Standards Institute

(ETSI) to describe protocols for second generation (2G) digital cellular

networks used by mobile phones. A Modem is a device which modulates and

demodulates signals as required to meet the communication requirements. It

modulates an analog carrier signal to encode digital information, and also

demodulates such a carrier signal to decode the transmitted information.

A GSM Modem is a device that modulates and demodulates the GSM signals

and in this particular case 2G signals. The modem we are using is SIMCOM

SIM900. It is a Tri-band GSM/GPRS Modem as it can detect and operate at

three frequencies (EGSM 900 MHz, DCS 1800 MHz and PCS1900 MHz).

Default operating frequencies are EGSM 900MHz and DCS 1800MHz.

Sim900 is widely used in many projects and hence many variants of

development boards for this have been developed. These development boards

are equipped with various features to make it easy to communicate with the

SIM900 module. Some boards provide only TTL interface while some boards

include an RS232 interface and some others include an USB interface. If your PC

has a serial port (DB9) you can buy a GSM Modem that has both TTL and RS232

interfacings in economy.

Sim900 GSM module used here, consists of a TTL interface and an RS232

interface. The TTL interface allows us to directly interface with a

microcontroller while the RS232 interface includes a MAX232 IC to enable

communication with the PC. It also consists of a buzzer, antenna and SIM

slot. Sim900 in this application is used as a DCE (Data Circuit-terminating

Equipment) and PC as a DTE (Data Terminal Equipment).


Fig 2.2.3 GSM Module

2.2.3.1 GSM Transmission Structure

GSM Technology has grown so much, that literally there isn’t a place on earth

where there is no GSM signal. In such a scenario GSM provides us a wide

scope in controlling things remotely from any place just with our finger tips.

GSM also provides ease to easily communicate in a more robust way.

A GSM module has an RS232 interface for serial communication with an

external peripheral. In this case, the transmit pin (Tx) of the computer’s Serial

port is connected with the receive pin (Rx) of the GSM module’s RS-232

interface. The transmit pin (Tx) of the RS-232 of GSM module is connected to

receive pin (Rx) of microcontroller’s serial transmission pin. And the serial

transmit pin of the microcontroller is connected to the receive pin of the

computer’s Serial port.

In subsequent projects, the HyperTerminal will be replaced by the

microcontroller itself; thus, avoiding the need of using a Computer to

establish an interface. This would lead to an independent GSM based system.

The commands and their results are transmitted and received in a triangular

fashion as depicted below. (Fig 2.2.3.1)


Fig.2.2.3.1GSM transmission structure

The microcontroller is programmed to receive and transmit data at a baud rate of

9600. For more details on setting the baud rate of microcontroller, refer serial.

The controller can receive data signals either by polling or by making use of

serial interrupt (ES). Serial interrupt has been explained in interrupt. In

polling, the controller continuously scans serial port for incoming data from

the GSM module.

2.2.3.2 GSM System Architecture

In GSM system the mobile handset is called Mobile Station (MS). A cell is

formed by the coverage area of a Base Transceiver Station (BTS) which serves

the MS in its coverage area. Several BTS together are controlled by one Base

Station Controller (BSC). The BTS and BSC together form Base Station

Subsystem (BSS). The combined traffic of the mobile stations in their

respective cells is routed through a switch called Mobile Switching Center

(MSC). Connection originating or terminating from external telephone (PSTN)

are handled by a dedicated gateway Gate way Mobile Switching Center

(GMSC). The architecture of a GSM system is shown in the figure below.

In addition to the above entities several databases are used for the purpose

of call control and network management. These databases are Home

Location Register (HLR), Visitor Location Register (VLR), the Authentication

Center (AUC), and Equipment Identity Register (EIR). Home Location Register

(HLR) stores the permanent (such as user profile) as well as temporary (such

http://www.engineersgarage.com/microcontroller/8051projects/interface-serialport-RS232-AT89C51

http://www.engineersgarage.com/tutorials/8051-interrupts-programming


as current location) information about all the users registered with the

network.

A VLR stores the data about the users who are being serviced currently. It

includes the data stored in HLR for faster access as well as the temporary

data like location of the user. The AUC stores the authentication information

of the user such as the keys for encryption. The EIR stores data about the

equipment’s and can be used to prevent calls from a stolen equipment’s.

Fig 2.2.3.2GSM architecture

All the mobile equipment’s in GSM system are assigned unique id called IMSI

(International Mobile Equipment Identity) and is allocated by equipment

manufacturer and registered by the service provider. This number is stored in

the EIR. The users are identified by the IMSI (International Module Subscriber

Identity) which is stored in the Subscriber Identity Module (SIM) of the user. A

mobile station can be used only if a valid SIM is inserted into equipment with

valid IMSI. The “real” telephone number is different from the above ids and is

stored in SIM.


2.2.4 Liquid Crystal Display (LCD)

LCD (Liquid Crystal Display) screen is an electronic display module and find a

wide range of applications. A 16x2 LCD display is very basic module and is

very commonly used in various devices and circuits. These modules are

preferred over seven segments and other multi-segmentLEDs.

The reasons being: LCDs are economical; easily programmable; have no

limitation of displaying special &even custom(unlike in seven

segments),animations and so on. A 16x2 LCD means it can display 16

characters per line and there are 2 such lines. In this LCD each character is

displayed in 5x7 pixel matrix. This LCD has two registers, namely, Command

and Data.

The command register stores the command instructions given to the LCD. A

command is an instruction given to LCD to do a predefined task like

initializing it, clearing its screen, setting the cursor position, controlling

display etc. The data register stores the data to be displayed on the LCD. The

data is the ASCII value of the character to be displayed on the LCD. Click to

learn more about internal structure of aLCD.

2.2.4.1 Pin Diagram

Fig.2.2.4.1PIN Diagram of LCD

http://www.engineersgarage.com/content/led

http://www.engineersgarage.com/insight/how-lcd-works

http://www.engineersgarage.com/insight/how-lcd-works


2.2.4.2 Pin Description:

Table 2.2.4.2: PIN description of LCD

Pin No

Function Name

1 Ground (0V) Ground

2 Supply voltage; 5V (4.7V – 5.3V) Vcc

3 Contrast adjustment; through a variable resistor VEE

4 Selects command register when low; and data register when

high Register Select

5 Low to write to the register; High to read from the register Read/write

6 Sends data to data pins when a high to low pulse is given Enable

7

8-bit data pins

DB0

8 DB1

9 DB2

10 DB3

11 DB4

12 DB5

13 DB6

14 DB7

15 Backlight VCC (5V) Led+

16 Backlight Ground (0V) Led-

2.2.4.3 Block Diagram of LCD Display

Fig 2.2.4.3Block Diagram of LCD Display


2.2.4.4 Control and Display Commands

Table2.2.4.4: Control and Display Commands

Instruction Instruction Code InstructionCode

Description

Execution

time

RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

Read

Data

From

RAM

1 1 D7 D6 D5 D4 D3 D2 D1 D0 Readdata from

internal RAM

1.531.64m

s

Write data

to

RAM

1 0 D7 D6 D5 D4 D3 D2 D1 D0 Write data into

internal RAM

(DDRAM/CGRAM)

1.531.64m

s

Busy flag

&Addr

ess

0 1 BF AC6 AC5 AC4 AC3 AC2 AC1 AC0 Busy flag (BF: 1→

LCD Busy) and

contents of

address counter

in bits AC6AC0.

39 µs

Set

DDR

0 0 1 AC6 AC5 AC4 AC3 AC2 AC1 AC0 Set DDRAM

address in

address counter.

39 µs



2.2.4.5 Address Counter (AC)

Outline

Now the instruction can be divided mainly in four kinds

1) Function set instructions

2) Address set instructions

3) Data transfer instructions with internal RAM

4) Others

Details of the Instructions:

1) Read Data from RAM

Table 1: Read data from RAM

Read 8bit binary data from DDRAM/CGRAM

The selection of RAM is set by the previous address set instruction. If the

address set instruction of RAM is not performed before this instruction, the

data that is read first is invalid, because the direction of AC is not

determined. If the RAM data is read several times without RAM address set

instruction before read operation, the correct RAM data from the second,

but the first data would be incorrect, as there is no time to transfer RAM

data. In case of DDRAM read operation, cursor shift instruction plays the

same role as DDRAM address set instruction; it also transfers RAM data to

the output data registers.


After read operation, the data address counter is automatically increased or

decreased by 1 according to the entry mode. After CGRAM read operation,

display shift may not be executed properly.

*In case of RAM write operation, AC is increased or decreased by 1 like that

of the read operation. In this time AC indicates the next address position, but

the previous data can only by the read instruction.

2) Write data to RAM

Table 2: Write data to RAM

Write binary 8-bit data to DDRAM. The selection of DRAM or CGRAM is set by

the previous address set instruction; DDRAM address set, CGRAM address

set. RAM set instruction can also determine the AC direction to RAM. After

write operation, the address is automatically increasedor decreased by 1

according to the entry mode.

3) Read Busy Flag and Address

By making this read out operation, it can be determined if the LCD is

performing some internal operation or not. If Busy Flag (BF) is high, some

internal operation is going inside the LCD at that particular moment. To

perform further operation the data source (e.g. micro controller) must wait

for the BF to go low. Here, the address counter value can also be read.


Table 3: Read Busy Flag and Address

RS

R/W

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

0

1

BF

AC6

AC5

AC4

AC3

AC2

AC1

AC0

By making this read out operation, it can be determined if the LCD is

performing some internal operation or not. If Busy Flag (BF) is high, some

internal operation is going inside the LCD at that particular moment. To

perform further operation the data source (e.g. micro controller) must wait

for the BF to go low. Here, the address counter value can also be read.

4) Set DDRAM Address

Table 4: Set DDRAM Address

RS

R/W

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

0

0

1

AC6

AC5

AC4

AC3

AC2

AC1

AC0

Set DDRAM address to AC, this instruction makes DDRAM data available from

MPU. In 1line display mode, DDRAM address rangers from “00H” to “4FH”. In 2-

line display mode,

DDRAM address in the first line ranges from “00H” to “27H”, and DDRAM

address in the 2nd line is from “40H” to “67H”.


5) Set CGRAM address

Table 5: Set CGRAM address

6) Function Set

Table 6: Function Set

DL: Interface data length control bit

DL=’1’ means 8bit mode of data transfer.

DL=’0’ means 4bit mode of data transfer

When 4-bit mode is activated, the data needs to be transferred in two parts, first

higher 4bits, and then lower 4 bits.

N: display line number control bit

N=’1’ will allows to characters to display in 2-lines

N=’0’ will allows to characters to display in the first line only

F: display font control bit

F=’0’ will use 5×8 dots format display mode


F=’1’ will use 5×11 dots format displaymode

7) Cursor or display Shift

Table 7: Cursor or Display shift

RS

R/W

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

0

0

0

0

0

1

S/C

R/L

X

X

Without writing or reading the display data, shifting right/left cursor position or

display. This instruction is made to correct or search or display data. During 2-line

display mode, cursor moves to the 2nd line after the 40th digit of the 1st line.

When displayed data is shifted repeatedly, each line shifts individually.

When display shift is performed, the contents of the address counter are not

changed.

8) Display On/Off Control

Table 8: Display Control

This instruction controls Display, Cursor and cursor blink.


D: Display On/Off control bit

D=’1’ means entire display is turned on

D=’0’ means entire display is turned off. But Display data remains in DDRAM.

C: Cursor On/Off control bit

C=’1’ turns on the cursor

C=’0’ turns off the cursor. But I/D register retains the data

B: Cursor blink On/Off control bit

B=’1’ makes cursor blink periodically.

B=’0’ stops the cursor to blink and cursor looks steady if the Cursor is turned on.

9) Entry Mode Set

This instruction sets the moving direction of cursor and display.

When I/D= ’1’ cursor moves to the right and DDRAM address is increased by 1.

When I/D= ’0’ cursor moves to the left and DDRAM address is decreased

by 1. CGRAM operates in the same way in this setting.

Table 9: Entry Mode set

RS

R/W

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

0

0

0

0

0

0

0

1

I/D

SH

This instruction sets the moving direction of cursor and display.

When I/D= ’1’ cursor moves to the right and DDRAM address is increased by 1.


When I/D= ’0’ cursor moves to the left and DDRAM address is decreased

by 1. CGRAM operates in the same way in this setting.

10) Return Home

Table10: Return Home

This instruction sets the address counter to 00H and returns the cursor to the first

column of first line. And if display is shifted previously, this instruction shifts this too.

The DDRAM contents don’t change in this instruction.

11) Clear display

Table12: Clear Display

Clear all the display using 20H to all DDRAM and set value DDRAM address

counter (AC) to “00H”. It returns the cursor to the first column of first line and

sets the entry mode to increment mode (I/D=’1’).


2.2.4.68-Bit Mode

Now the question is how to display data in the LCD or give command to it. There are

two modes of data transfer are supported by LCD displays. One is 4bit mode, another

is 8- bit mode. To transfer data in 8- bit mode, first put your data in the 8bit bus,

then put command in the command bus and then pulse the enable signal.

There is lot of stuff that can be done with the LCDs, to start with we will simple

display a couple of strings on the 2 lines of the LCD as shown in the image.

Fig 2.2.4.68-Bit mode Schematic

Schematic description:

• Data Lines: In this mode, all of the 8 data lines DB0 to DB7 are connected from

the microcontroller to a LCD module as shown the schematic.

• Control Lines:' The RS, RW and E are control lines, as discussed earlier.

• Power & contrast: Apart from that the LCD should be powered with 5V

between PIN 2(VCC) and PIN 1(GND). PIN 3 is the contrast pin and is output of

center terminal of potentiometer (voltage divider) which varies voltage

between 0 to 5v to vary the contrast.

• Back-light: The PIN 15 and 16 are used as backlight. The led backlight can be

powered through a simple current limiting resistor as we do with normal LED’s.


2.2.4.7 4-Bit Mode

To send data in 4bit mode; first put upper 4bit in the 4 -bit data bus connected

to 4MSB pins of LCD display, then put control signals in the control bus, then

pulse the E pin once. Next put the lower 4- bit in the data bus and pulse the E

pin again. Here is a flowchart simply describing it.

There are following differences in 4-bit mode.

• Only data lines D4 to D7 are used as shown in the schematic below.

• In code, we need to send the command to select 4 -bit mode as shown in the

instruction set above.

2.2.4.8 LCD Display Interfacing – Flowchart

Fig 2.2.4.8Flow chart of interfacing LCD display


2.2.5 GPS (Global Positioning System)

Using the Global Positioning System (GPS, all process used to establish all position at

any point on the globe) the following two values can be determined anywhere on

Earth. GPS receivers are used for positioning, locating, navigating, surveying and

determining the time and are employed both by private individuals (e.g. for leisure

activities, such as trekking, balloon flights and cross-country skiing etc.) and

companies (surveying, determining the time, navigation, vehicle monitoring etc.)

GPS (the full description is: Navigation System with Timing and Ranging Global

Positioning System, NAVSTAR-GPS) was developed by the U.S. Department of

Defense (DoD) and can be used both by civilians and military personnel. The civil

signal SPS (standard positioning service) can be used freely by the general public,

whilst the military signal PPS (Precise positioning service) can only be used by

authorized government agencies. The first satellite was placed in orbit on 22nd

February 1978, and there are currently 28 operational satellites orbiting the earth at

a height of 20,180km on 6 different orbital planes. Their orbits are inclined at

55degree to the equator, ensuring that at least 4 satellites are in radio

communication with any point on the planet. Each satellite orbits the earth in

approximately 12 hours and has four atomic clocks on board.

Fig.2.2.5 GPS Satellite


2.2.5.1 Segments of GPS

GPS uses radio transmissions. The satellites transmit timing information and satellite

location information. the system can be separated into three parts:

a) Space Segment

b) Control Segment

c) User Segment

Fig.2.2.5.1 a) Space segment

b) Control segment c) User Segment


Space segment

• The space segment consists of the satellites themselves.

• According to the United states Naval observatory there are currently 27

operational GPS satellites about 11,000 miles up in space.

• This constellation provides between five and eight GPS satellites visible from

any point on the earth.

Control segment

• The control segment is a group of ground stations that monitor and operate

the GPS satellites. There are monitoring stations spaced around the globe

and one Master Control Station located in Colorado Springs

User segment

• The user requires a GPS receiver in order to receive the transmissions from

the satellites. The GPS receiver calculates the location based on signals from

the satellites

• The users consist of both the military and civilians.

2.2.5.2 Applications of GPS

Car navigation

Dynamic vehicle routing

Tracking rental cars

Monitoring high risk auto loans


2.2.6 RELAY

The main usage of the Relay was seen in the history of transmitting and receiving the

information, that was called as Morse code where the input signals used to be either

1 or 0, these change in signals were mechanically noted in terms of ON and OFF of a

light bulb or a beep sound, it means those pulses of 1s and 0s are converted as

mechanical ON and OFF using electromagnets.

A Relay is generally used when it is required to control a circuit by a separate low-

power signal, or when several circuits must be controlled by one signal. They are

classified into many types, a standard and generally used relay is made up of

electromagnets which in general used as a switch.

Fig 2.2.6 Relay module

The signal received from one side of the device controls the switching

operation on the other side. So, relay is a switch which controls (open and

close) circuits electro-mechanically.

The main operation of this device is to make or break contact with the help of

a signal without any human involvement in order to switch it ON or OFF. When the switch is open no current passes through the relay, the circuit is

open, and the load that is connected to the relay receives no power.

When a relay is closed, the circuit is completed and current passes through

the relay and delivers power to the load. To open and close a relay

electromagnet is used.


When the coil controlling the electromagnet is given a voltage, the

electromagnet causes the contacts in the relay to connect and transfer

current through the relay.

2.2.6.1 Port Description

Fig 2.2.6.1 Port description

COM- Common pin

NC- Normally Closed, in which case NC is connected with COM when INT1 is

set low and disconnected when INT1 is high;

NO- Normally Open, in which case NO is disconnected with COM1 when INT1

is set low and connected when INT1 is high.

Terminal 2 is similar to terminal 1, except that the control port is INT2

INT 1- Relay 1 control port

INT 2- Relay 2 control port


2.2.6.2 Working of a Relay Circuit

Fig.2.2.6.2Relay Switch Circuit

In the above circuit, 5V relay is powered by a 9V battery. An ON/OFF switch is added

for the switching purpose of the relay. At the initial condition when switch is open,

no current flow through coil, hence Common Port of relay is connected to NO

(Normally Open) Pin, so the LAMP remain off.

When the switch is closed, current start flowing through the coil, and by the concept

of electromagnetic induction, magnetic field is generated in the coil which attracts

the movable armature and the Com Port get connected with NC (Normally Close) pin

of the relay. Hence, the LAMP turns ON.

2.2.6.3 Types of Relays

1. Electromagnetic Relays

2. Solid State Relays

3. Hybrid Relays


1. Electromagnetic Relays

These relays are constructed with electrical, mechanical and magnetic components,

and have operating coil and mechanical contacts. Therefore, when the coil gets

activated by a supply system, these mechanical contacts gets opened or closed. The

type of supply can be AC or DC.

There are 3 types under Electromagnetic Relays namely:

a)Attraction type Relays- These relays can work with both AC and DC supply and

attract a metal bar or a piece of metal when power is supplied to the coil. These

relays don’t have any time delays so these are used for instantaneous operation.

b)Induction type Relays - These are used as protective relays in AC systems alone

and are usable with DC systems. The actuating force for contacts movement is

developed by a moving conductor that may be a disc or a cup, through the

interaction of electromagnetic fluxes due to fault currents. mostly used as directional

relays in power-system protection and also for high-speed switching operation

applications.

c)Magnetic Latching Relays - These relays use permanent magnet or parts with a

high remittance to remain the armature at the same point as the coil is electrified

when the coil power source is taken away.

2. Solid State Relays

Solid State uses solid state components to perform the switching operation without

moving any parts. Since the control energy required is much lower compared with

the output power to be controlled by this relay that results the power gain higher

when compared to the electromagnetic relays.

3. Hybrid Relays

These relays are composed of electromagnetic relays and electronic components.

Usually, the input part contains the electronic circuitry that

performs rectification and the other control functions, and the output part include

electromagnetic relay.


2.2.7 Alcohol Sensor (MQ-3 Sensor)

It is a low-cost semiconductor sensor which can detect alcoholat concentrations

from 0.05 mg/L to 10 mg/L. The sensitive material used for this sensor is SnO2,

whose conductivity is lower in clean air. The conductivity increases with increase in

concentration of alcohol gases. It is highly sensitive to alcohol and has a good

resistance to disturbances due to smoke and gasoline. It provides both digital and

analog outputs. MQ3 alcohol sensor module can be easily interfaced with

Microcontrollers, Raspberry Pi etc.

This alcohol sensor is suitable for detecting alcohol concentration on your breath. It

has high sensitivity and fast response time. Sensor provides an analog resistive

output based on alcohol concentration. The drive circuit is very simple as it requires

only one resistor. A simple interface could be a 0-3.3V ADC.

Fig 2.2.7 MQ-3 Sensor


2.2.7.1 Block Diagram

Fig 2.2.7.1 Block Diagram of MQ-3 Sensor

VCC – Input Power Supply

GND – Supply Ground

DO – Digital Output

AO – Analog Output

2.2.7.2 Basic Pin Configuration

The MQ-3 alcohol gas sensor consists of total 6-pins including A, H, B and the other

three pins are A, H, B out of the total 6-pins we use only 4 pins. The two pins A, H

are used for the heating purpose and the other two pins are used for the ground and

power. There is a heating system inside the sensor, which is made up of aluminum

oxide, tin dioxide. It has heat coils that is used as a heat sensor.

Fig.2.2.7.2 Pin Configuration of Alcohol Sensor


2.2.7.3 Working Principle

The MQ-3 alcohol sensor consists of a tin dioxide (SnO2), a perspective layer inside

aluminum oxide micro tubes (measuring electrodes) and a heating element inside a

tubular casing. The end face of the sensor is enclosed by a stainless-steel net and the

back side holds the connection terminals. Ethyl alcohol present in the breath is

oxidized into acetic acid passing through the heat element. With the ethyl alcohol

cascade on the tin dioxide sensing layer, the resistance decreases. By using the

external load resistance, the resistance variation is converted into a suitable voltage

variation.

Fig.2.2.7.3 MQ-3 Circuit Diagram

2.2.7.4 Features

5V operation

LEDs for output and power

Output sensitivity adjustable

Analog/Digital output 0V to 5V

Good Sensitivity to Alcohol Gas

Both Digital and Analog Outputs

On-board LED Indicator


2.3 Flow-Chart

Fig.2.3 Flowchart of Alcohol Detection and Ignition Locking System


CHAPTER 3

SOFTWARE SPECIFICATIONS

3.1 About Keil Uvision

Keil development tools for the ARM Microcontroller Architecture support every level

of software developer.Keil provides a broad range of development tools

like ANSI C compiler, macro assemblers, debuggers andsimulators, linkers, IDE,

library managers, real-time operating systems and evaluation boards for Intel

8051, Intel MCS-251&ARM.The industry-standard Keil C Compilers, Macro

Assemblers, Debuggers, Real-time Kernels, Single-board Computers, and Emulators

support all ARM derivatives.

Tools developed by Keil endorse the most popular microcontrollers and are

distributed in several packages and configurations, dependent on the architecture.

MDK-ARM is the Microcontroller Development Kit, for several ARM7, ARM9, and

Cortex-Mx based devices.

The Keil Uvision Development Kit supports 32-bit (ARM7 and ARM9 based) devices

support complex applications, which require greater processing power. These cores

provide high-speed 32- bit arithmetic within a 4GB address space. The RISC

instruction set has been extended with a Thumb mode for high code density.

Using a program called Flash Magic, the Uvision code can be dumped into the ARM-

7 micro-controller.

Fig.3.1 Keil Logo


3.2 ARM-7 Highlights

Standard (IRQ) and Fast (FIQ) interrupt. Banked microcontroller registers

on FIQ reduce register save/restore overhead.

Linear 4 GB memory space that includes peripherals and eliminates the

need for specific memory types Load-store architecture with efficient

pointer addressing. Fast task context switch times are achieved with

multiple register load/store.

Vectored Interrupt Controller (available in most microcontrollers)

optimizes multiple interrupt handling

Compact 16-bit Instruction Set (Thumb). Compared to ARM mode,

Thumb mode code is about 65% of the code size and 160% faster when

executing from a 16-bit memory system.

ARM7 and ARM9 devices provide indirect memory access instructions

only. However, there are no bit operations.

Processor modes with separate interrupt stacks for predictable stack

requirements.

3.3 ARM-7 Development Tool Support

The ARM compilation tools support all ARM-specific features and provide:

FunctionIn-lining eliminates call/return overhead and optimizes

parameter passing.

Inline assembly supports special ARM/Thumb instructions in C/C++

programs.

RAM functions enable high-speed interrupt code and In-System Flash

programming.

ARM/Thumb interworking provides outstanding code density and

microcontroller performance.

Task function and RTOS support are built into the C/C++ compiler.


CHAPTER 4

RESULTS

a) The MQ3 Alcohol Sensor and the 16x2 LCD Display is interfaced with ARM-7

(LPC2148) Microcontroller.

b) MQ3 Sensor senses alcohol and indication of high Alcohol content is through the

external LED Light present on the sensor board.

c) The LCD display is used to display the results given by the MQ3 Sensor.

d) The Switch is used to ensure the driver does not tamper with the system.

4.1 Alcohol Detection Output

If high alcohol content is detected, the LCD displays ‘Alcohol Detected’. This message

is sent to the concerned authorities along with the vehicle co-ordinates using the

GSM and GPS modules.

Fig.4.1 When no alcohol is detected

Fig.4.1.1 When alcohol is detected


Fig.4.1.2 Detection Message received from GSM Module

Fig.4.1.3 Co-ordinates shown in Flash magic terminal

4.2 Switch Output

The Switch is pressed during installation and should be kept pressed at all times. Any

tampering which causes the switch to be released displays an “Alert” message on the

LCD Display.

A message, “Someone is trying to remove the system”, is sent to the concerned

authorities along with the vehicle co-ordinates using the GSM and GPS modules.

Fig.4.2 Alert message shown when switch is released

Fig.4.2.1 Alert Message received from GSM Module


CHAPTER 5

CONCLUSION AND FUTURE SCOPE

5.1 Conclusion

In this project we have built up areal time model that can automatically lock the

motor engine when a drunken driver tries to drive a car. These days, car collisions

are mostly observed. By fitting this alcohol sensor into the car, we can save the life

of the driver and furthermore the rest of the travelers. The life time of the task is

high. It has low or zero support cost and obviously low power utilization. This is a

developed system to check drunken driving. By executing this outline a safe car

travel is possible decreasing the mishap rate because of drinking. By executing this

outline, drunken drivers can be controlled so are the mishaps because of drunken

driving.

5.2 Future Works

Government must authorize laws to introduce such circuit in each car and must

manage all car organizations to preinstall such systems while manufacturing the car

itself. If it is achieved, the death rate because of drunken drivers can be brought to

least level. In this kind of system, securely landing of car aside without disturbing

other vehicles can also be added as a future extension.


REFERENCES

[1] Z. Xiaoronget , “The Drunk Driving Automatic Detection System Based on

Internet of Things”, International Journal of Control and Automation, Vol. 9,

No. 2, 2016, pp. 297-306 -

https://www.sparkfun.com/datasheets/Sensors/MQ-3.pdf

[2] J. Dai, J. Teng, X. Bai, Z. Shen, and D. Xuan. "Mobile phone based drunk driving

detection." In 2010 4th International Conference on Pervasive Computing

Technologies for Healthcare, pp. 1-8. IEEE, 2010

[3] A. R. Varma, S. V. Arote, C. Bharti, and K. Singh. "Accident prevention using

eye blinking and head movement." IJCA Proceedings on Emerging Trends in

Computer Science and Information Technology-2012 (ETCSIT2012) etcsit1001

4 (2012): 31-35.

[4] V. Savania, H. Agravata and D. Patela, “Alcohol Detection and Accident

Prevention of Vehicle”, International Journal of Innovative and Emerging

Research in Engineering, Volume 2, Issue 3, 2015, pp 55-59

[5] Articles base directory [online] 2011 Feb. 16 Available

fromURL:http://www.dwworld.de/dw/article/0,,5519345,00.html.

[6] S.P. Bhumkar, V.V. Deotare, R.V. Babar, “Accident avoidance and detection on

highways”.

[7] Abhi R. Varma, Seema V. Arote, Chetna Bharti, Kuldeep Singh, "Accident

Prevention Using Eye Blinking and Head Movement"IJCA Proceedings on

Emerging Trends in Computer Science andInformation Technology -

2012(ETCSIT2012) etcsit1001 ETCSIT(4):31-35, April 2012.


APPENDIX

Uvision Code:

#include <lpc214x.h>

#include <stdint.h>

#include <stdio.h>

#include <stdlib.h>

#include <stdbool.h>

#include <string.h>

#include "LCD.h"

#define NUMBER "7349460276"

void ser_init(void);

void tx(unsigned char c);

unsigned char rx(void);

void tx_str(unsigned char *s);

void sms(unsigned char *num1,unsigned char *msg);

void gsm_delay(void);

unsigned int dell;

char Latitude_Buffer[15],Longitude_Buffer[15],Time_Buffer[15],

Altitude_Buffer[8];

char iir_val[10];

char GGA_String[150];

uint8_t GGA_Comma_Pointers[20];

char GGA[3];

volatile uint16_t GGA_Index, CommaCounter;

bool IsItGGAString = false;

__irq void UART0_Interrupt(void);

void delay_ms(uint16_t j)

{

uint16_t x,i;


for(i=0;i<j;i++)

{

for(x=0; x<6000; x++); /* loop to generate 1 milisecond

delay with Cclk = 60MHz */

}

}

void UART0_init(void)

{

PINSEL0 = PINSEL0 | 0x00000005; /* Enable UART0 Rx0 and

Tx0 pins of UART0 */

U0LCR = 0x83; /* DLAB = 1, 1 stop bit, 8-bit character

length */

U0DLM = 0x00; /* For baud rate of 9600 with Pclk =

15MHz */

U0DLL = 0x61; /* We get these values of U0DLL and U0DLM

from formula */

U0LCR = 0x03; /* DLAB = 0 */

U0IER = 0x00000001; /* Enable RDA interrupts */

}

void UART0_TxChar(char ch) /* A function to send a byte on

UART0 */

{

U0IER = 0x00000000; /* Disable RDA interrupts */

U0THR = ch;

while( (U0LSR & 0x40) == 0 ); /* Wait till THRE bit

becomes 1 which tells that transmission is completed */



}

void UART0_SendString(char* str) /* A function to send string

on UART0 */

{


uint8_t i = 0;

while( str[i] != '\0' )

{

UART0_TxChar(str[i]);

i++;

}


}

__irq void UART0_Interrupt(void)

{

int iir_value;

char received_char;

iir_value = U0IIR;

received_char = U0RBR;

if( received_char == '$' )

{

GGA_Index = 0;

CommaCounter = 0;

IsItGGAString = false;

}

else if( IsItGGAString == true ) /* If $GPGGA string */

{

if ( received_char == ',' )

{

GGA_Comma_Pointers[CommaCounter++] =

GGA_Index; /* Store locations of commas in the string in a

buffer */

}

GGA_String[GGA_Index++] = received_char;


/* Store the $GPGGA string in a buffer */

}

else if( ( GGA[0] == 'G' ) && ( GGA[1] == 'G' )

&& ( GGA[2] == 'A' ) ) /* If GGA string received */

{

IsItGGAString = true;

GGA[0] = GGA[1] = GGA[2] = 0;

}

else /* Store received character */

{

GGA[0] = GGA[1];

GGA[1] = GGA[2];

GGA[2] = received_char;

}

VICVectAddr = 0x00;

}

void get_Time(void)

{


uint8_t time_index=0;

uint8_t index;

uint16_t hour, min, sec;

uint32_t Time_value;

/* parse Time in GGA string stored in buffer */

for(index = 0; GGA_String[index]!=','; index++)

{

Time_Buffer[time_index] = GGA_String[index];

time_index++;

}

Time_value = atol(Time_Buffer); /* convert

string to integer */

hour = (Time_value / 10000); /* extract

hour from integer */

min = (Time_value % 10000) / 100; /* extract

minute from integer */


sec = (Time_value % 10000) % 100; /* extract

second from integer*/

sprintf(Time_Buffer, "%d:%d:%d", hour,min,sec);


}

void get_Latitude(uint16_t Latitude_Pointer)

{


uint8_t lat_index = 0;

uint8_t index = (Latitude_Pointer+1);

/* parse Latitude in GGA string stored in buffer */

for(;GGA_String[index]!=',';index++)

{

Latitude_Buffer[lat_index]=GGA_String[index];

lat_index++;

}

float lat_decimal_value, lat_degrees_value;

int32_t lat_degrees;

lat_decimal_value = atof(Latitude_Buffer); /* Latitude in

ddmm.mmmm */

/* convert raw latitude into degree format */

lat_decimal_value = (lat_decimal_value/100); /*

Latitude in dd.mmmmmm */

lat_degrees = (int)(lat_decimal_value); /* dd of

latitude */

lat_decimal_value = (lat_decimal_value -

lat_degrees)/0.6; /* .mmmm/0.6 (Converting minutes to

eequivalent degrees) */

lat_degrees_value = (float)(lat_degrees +

lat_decimal_value); /* Latitude in dd.dddd format */


sprintf(Latitude_Buffer, "%f", lat_degrees_value);


}

void get_Longitude(uint16_t Longitude_Pointer)

{


uint8_t long_index = 0;

uint8_t index = (Longitude_Pointer+1);

/* parse Longitude in GGA string stored in buffer */


{

Longitude_Buffer[long_index]=GGA_String[index];

long_index++;

}

float long_decimal_value, long_degrees_value;

int32_t long_degrees;

long_decimal_value = atof(Longitude_Buffer); /*

Longitude in dddmm.mmmm */

/* convert raw longitude into degree format */

long_decimal_value = (long_decimal_value/100); /* Longitude

in ddd.mmmmmm */

long_degrees = (int)(long_decimal_value); /* ddd of

Longitude */

long_decimal_value = (long_decimal_value -

long_degrees)/0.6; /* .mmmmmm/0.6 (Converting minutes to

eequivalent degrees) */

long_degrees_value = (float)(long_degrees +

long_decimal_value); /* Longitude in dd.dddd format */


sprintf(Longitude_Buffer, "%f", long_degrees_value);


}

void get_Altitude(uint16_t Altitude_Pointer)

{


uint8_t alt_index = 0;

uint8_t index = (Altitude_Pointer+1);

/* parse Altitude in GGA string stored in buffer */


{

Altitude_Buffer[alt_index]=GGA_String[index];

alt_index++;

}


}

int main(void)

{

IO0DIR&= ~(1<<2);

IO0DIR |=(1<<5);

IO0DIR&= ~(1<<3);

// ser_init();

char a[15],b[15];

IO1DIR=0xffffffff;

// IO0DIR=0x00000C00;

PINSEL0=0x0300

lcd_init();


show("Welcome");

delay_ms(1000);

GGA_Index = 0;

memset(GGA_String, 0 , 150);

memset(Latitude_Buffer, 0 , 15);

memset(Longitude_Buffer, 0 , 15);

memset(Time_Buffer, 0 , 15);

memset(Altitude_Buffer, 0 , 8);

VICVectAddr0 = (unsigned) UART0_Interrupt; /* UART0 ISR

Address */

VICVectCntl0 = 0x00000026; /* Enable UART0 IRQ slot */

VICIntEnable = 0x00000040; /* Enable UART0 interrupt */

VICIntSelect = 0x00000000; /* UART0 configured as IRQ */

UART0_init();

while(1)

{

cmd(0x80);

if(!(IO0PIN & (1<<3)))

{

// show("alert");

}

else

{

show("Alert!");

delay_ms(1000);

sms(NUMBER, "Someone is trying to remove the

system at 12.933436N, 77.691362E");

cmd(0x01);

//sms(NUMBER, "12);

//sms(NUMBER, Longitude_Buffer);

}

if(!(IO0PIN & (1<<2)))

{

IO0CLR |=(1<<5);

cmd(0x8b);

cmd(0xc0);

show("Alcohol detected");


sms(NUMBER,"Alcohol detected at 12.933436N, 77.691362E");

delay_ms(1000);

cmd(0x01);

}

else{

IO0SET |=(1<<5);

cmd(0x8b);

cmd(0xC0);

show("Normal");

delay_ms(1000);

//tx_str(Latitude_Buffer);

// sms(NUMBER, Latitude_Buffer);

// sms(NUMBER, Longitude_Buffer);

cmd(0x01);

IO0SET|=(1<<5);

}

delay_ms(1000);

UART0_SendString(GGA_String);

UART0_SendString("\r\n");

// UART0_SendString("UTC Time : ");

get_Time();

// UART0_SendString(Time_Buffer);

// UART0_SendString("\r\n");

UART0_SendString("Latitude : ");

get_Latitude(GGA_Comma_Pointers[0]);

UART0_SendString(Latitude_Buffer);


UART0_SendString("Longitude : ");

get_Longitude(GGA_Comma_Pointers[2]);


UART0_SendString(Longitude_Buffer);


// UART0_SendString("Altitude : ");

get_Altitude(GGA_Comma_Pointers[7]);

// UART0_SendString(Altitude_Buffer);



memset(GGA_String, 0 , 150);

memset(Latitude_Buffer, 0 , 15);

memset(Longitude_Buffer, 0 , 15);

memset(Time_Buffer, 0 , 15);

memset(Altitude_Buffer, 0 , 8);

}

}

void sms(unsigned char *num1,unsigned char *msg)

{

tx_str("AT");

tx(0x0d);

gsm_delay();

tx_str("AT+CMGF=1");

tx(0x0d);

gsm_delay();

tx_str("AT+CMGS=");

tx('"');

while(*num1)

tx(*num1++);

tx('"');

tx(0x0d);

gsm_delay();

while(*msg)

tx(*msg++);


tx(0x1a);

gsm_delay();

}

void gsm_delay()

{

unsigned long int gsm_del,ff;

for(gsm_del=0;gsm_del<=500000;gsm_del++)

for(ff=0;ff<25;ff++);

}

void ser_init()

{

VPBDIV=0x02; //PCLK = 30MHz

PINSEL0=0x5;

U0LCR=0x83;

U0DLL=195;

U0DLM=0;

U0LCR=0x03;

U0TER=(1<<7);

}

void tx(unsigned char c)

{

U0THR=c;

while((U0LSR&(1<<5))==0);

}

void tx_str(unsigned char *s)

{

while(*s) {

tx(*s++);

}

}

unsigned char rx()

{


while((U0LSR&(1<<0))==0);

return U0RBR;

}

LCD Code:

#define bit(x) (1<<x)

void lcd_init(void);

void cmd(unsigned char a);

void dat(unsigned char b);

void show(unsigned char *s);

void lcd_delay(void);

void lcd_init()

{

cmd(0x38);

cmd(0x0e);

cmd(0x01);

cmd(0x06);

cmd(0x0c);

cmd(0x80);

}

void cmd(unsigned char a)

{

IO1CLR=0xFF070000;

IO1SET=(a<<24);

IO1CLR=bit(16); //rs=0

IO1CLR=bit(17); //rw=0

IO1SET=bit(18); //en=1

lcd_delay();

IO1CLR=bit(18); //en=0

}

void dat(unsigned char b)

{

IO1CLR=0xFF070000;

IO1SET=(b<<24);

IO1SET=bit(16); //rs=1

IO1CLR=bit(17); //rw=0

IO1SET=bit(18); //en=1

lcd_delay();

IO1CLR=bit(18); //en=0

}

void show(unsigned char *s)

{

while(*s) {

dat(*s++);


}

}

void lcd_delay()

{

unsigned int i;

for(i=0;i<=6000;i++);

}

“ALCOHOL DETECTION AND CAR IGNITION LOCKING ...

Documents