ieee 2012 projects for m tech btech ece eee embedded systems@ srcembedded solutions- hyderabad. web:www.srcembedded.com, ph-8297 313 858 mail:srcembedded@gmail.com

1. A HYBRID WIRED/WIRELESS NETWORKING
INFRASTRUCTURE FOR GREENHOUSE MANAGEMENT
Introduction:
In this paper, the problems related to the management of a farm made up of several
greenhouses are discussed. The management of this kind of farms requires data acquisition in
each greenhouse and their transfer to a control unit which is usually located in a control room,
separated from the production area. At present, the data transfer between the greenhouses and the
control system is mainly provided by a suitable wired communication system, such as a fieldbus.
In such contexts, even though the replacement of the wired system with a fully wireless one can
appear very attractive, a fully wireless system can introduce some disadvantages. A solution
based on a hybrid wired/wireless network, where Controller Area Network and ZigBee protocols
are used, is presented along with all the related problems that this integration involves. A suitable
multiprotocol bridge has been implemented.
Existing System:
In existing method, the data transfer between the greenhouses and the control system is
mainly provided by a suitable wired communication system, even though the replacement of the
wired system with a fully wireless one can appear very attractive, a fully wireless system can
introduce some disadvantages. Hence we propose this system.
Proposed System:
The system to be controlled is made up of several greenhouses distributed in a field. Each
greenhouse is used for the production of several kinds of plants, which can vary according to the
season and to the requests from the market. Each greenhouse is equipped with sensor which
performs all the activities requested for the correct growth of plants. Sensors are mainly used for
the measurement of temperature and humidity, which represent two key parameters inside the
greenhouse. In this project consists of two slave node and one master node, the communication

2. between the master and slave nodes are using CAN protocol. And communication between the
master node and monitoring section is zigbee wireless technology. The sensor values are sensed
by slave nodes using corresponding sensor, slave nodes are sent sensor information to master
node using two wired communication CAN protocol. The master controller sends sensor value to
monitoring section using zigbee wireless technology. Using .NET application the sensor data’s
are updated with PC. If any abnormality occur means master send control instruction to slave
node the control environment condition by switch on the DC motor or exhaust fan to maintain
green house environment.

3. Block Diagram:
Greenhouse Environment:

4. PIC16F877A
CAN Controller
Master Node
CAN Transceiver
CANH
CAN
Bus
CANL
CAN Transceiver
CAN Transceiver
CAN Controller
CAN Controller
Slave No.1
Slave No.2
PIC16F877A
PIC16F877A
PIC16F877A
PIC16F877A
Temperature
Sensor
Relay
Relay
DC Motor
Exhaust Fan
Humidity
Sensor

5. Monitoring Section:
Power
Supply
Max 232
Hardware Requirements:

PIC16F877A Microcontroller

CAN controller

CAN Transceiver

Zigbee

Temperature sensor

Humidity Sensor.

DC motor
Software Requirements:

Embedded C.

MPLAB or CCS compiler.
Advantages:

Highly reliable.

Fast communication

Noise free communication
PC