GSM Based Industrial
Definition of embedded system
Examples of embedded systems.
Microprocessors and microcontrollers
widely used in embedded systems products.
Microcontroller is a programmable device.
Components present in the microcontroller
Microcontroller are used in the applications
which cost and space are critical.
Microcontrollers using this architecture have two different data
One is 8-bit wide and connects CPU to RAM memory.
Another one consists of several lines (12, 14 or 16) and connects
CPU to ROM memory
MAIN APPLICATION OF PROJECT
ATmega48/88 Microcontroller has been programmed
to sense the unauthorized person and fire.
SIM card is used in the modem.
GSM modem can be controlled by standard set of AT
In this module IR sensor, touch sensor, LDR sensor
and temperature sensor are used.
Here ir, touch and ldr sensors are used
for intruder alert through message to the
concerned mobile number.
Temperature sensor is used for fire alert
I.e. if there is very high temperature
which acts as a source for fire then
module gives an alert to the user
PIN Diagram Of Micro Controller Of ATmega32
The microcontroller is at the core of every embedded module
The Atmega32is a low-power CMOS 8-bit microcontroller
based on the AVR enhanced RISC architecture
A voltage regulator based on an active device
(such as a bipolar junction transistor, field
effect transistor or vacuum tube) operating in
its "linear region" and passive devices like
zener diodes operated in their breakdown
We need a line driver to convert the RS232’s
signals to TTL voltage levels that will be
acceptable to the microcontroller’s TxD and
One example of such a converter is MAX232
from Maxim Corp. The MAX232 converts the
RS232 voltage levels to TTL voltage levels, and
modem is used for wireless data transfer.
GSM Terminal is ideal for embedded applications.
Modem can communicate serially by RS232.
The GSM module offers the advantages as below
•Small, lightweight and easy to integrate.
•Low power consumption
Descriptions of the pins used:
Power ON / OFF control
A Passive Infrared sensor (PIR sensor) is
an electronic device that measures infrared (IR)
light radiating from objects in its field of view.
LDRs or Light Dependent Resistors are very
useful especially in light/dark sensor circuits.
A touch sensor is classified as a high impedance device
(or high impedance circuit) as the effect of a finger will
be detected by the circuit connected to the plate.
The LM35 series are precision integrated-circuit
Calibrated directly in ° Celsius (Centigrade)
Suitable for remote applications
Operates from 4 to 30 volts
CVAVR cross compiler
AVR studio programmer
Much easier to have security.
Both risk and liability is reduced.
It is flexible enough to be used from any
location.24 hrs/Day and 7 days a week.
High end security for industries
High end security for museums.
High end security for colleges.
High end security for Offices.
The design approach used here has given satisfactory results and the
microcontroller is sufficient for measuring the required parameters. The
power consumption has been kept as low as possible.