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1. Dual-Microcontroller Based GPRS Data
Transmission Control System Design
Abstract:
With the development of information society, many electronic systems served in
important area need to transfer data remotely and wirelessly. The general packet radio service
(GPRS) has been developed to allow packet data to be transported efficiently over an existing
circuit-switched radio network, such as GSM. The main applications of GPRS are in transporting
internet protocol (IP) data grams from web servers (for telemetry or for mobile Internet
browsers). By allowing information to be transmitted more quickly, immediately and efficiently
across the mobile network, GPRS may well be a relatively less costly mobile data service
compared to SMS and circuit switched data. GPRS become the first choice for remote wireless
data transmission because of its excellence in reliability, economy and other advantages. GPRS
data transmission systems have special modules to handle the baseband data, but the modules are
inconvenient to transfer data directly, communication channel controlling and data buffering
need external computer or controller circuit to achieve, so the data transmission control system is
required. In this paper, we are committed to Double microcontroller based GPRS data
transmission control system design.
Existing System:
However, the transmission control system needs to send and receive data simultaneously,
so two serial interfaces are needed. Some transmission control systems use dual-port MCU or
FPGA chip to implement two serial ports. In this paper, the data transmission control system
uses two single-serial-ported ATMEL AT89C51 microcontrollers as the controlling core.
Proposed System:
A new method is introduced in GPRS data transmission control system design, which is
to employ two microcontrollers as control core. Firstly introduced the GPRS data transmission
system, and then gave a new GPRS data transmission control system hardware schematic design
and software flow chart design. Compared to systems using single microcontroller, ARM control
core, the advantage of the new data transmission control system is presented. The master

2. microcontroller is connected with current and voltage sensors. The sensors were used to find the
faults in the microcontroller. The data will be monitored on both in local PC as well as in server.
The master controller sends data to local PC and sends same data to the slave microcontroller.
The device is controlled both from PC as well as from Server.
BLOCK DIAGRAM:
Robot Section:
Power supply
Power supply
Max232
LCD
Microcontroller
Microcontroller
AT89C51
AT89C51
Master
Slave
Max232
PC
GPRS
Modem
Relay
Device
Comparator
Current and
Voltage
Sensor

3. Control and Monitoring Section:
Power supply
GPRS Modem
Hardware Requirements:
 AT89C51 Microcontroller
 GPRS Modem
 Comparator
 Max232
 Current sensor
 Voltage sensor
 Relay Driver
 LCD
Software Used:

Keil Compiler

Embedded C

VB
Max232
PC

4. Advantages:


Cost efficient technique.
Remote monitoring Application