Flow of the demo of AUTOMATIC RAILWAY GATE CONTROL
1)Power supply should be given to both the boards. Reset
both boards. On the transmitter side on reset a message "Rail gate
cntrl" will appear on the LCD.
2)The IR present at the entry side is first cut indicating
that the train is arriving. The transmitter side will transmit the data 01 to
the receiver side. Once the receiver receives the data it rotates the stepper
motor in clockwise direction indicating that the gate is closed.
3)Meanwhile at the transmitter end the tag attached to the
train is swiped against an RFID reader and the details of the train is messaged
to the pre defined number through GSM modem.
4)The exit side IR is connected with the receiver side and
once the exit side IR is cut the stepper motor rotates in aticlockwise
direction indicating that the gate is opened.
5)After the exit side IR is cut then only the entry side IR
can be cut again to indicate the arrival of other train.
Transmitter side
1)The entry side IR is connected to the PORT 3^7.
2)The relay is connected to the PORT 1^7. If relay is made
as 1, then it switches to the UART connected to the RFID reader. If relay is
made 0 then it switches to the UART connected to the GSM MODEM. (Default UART
is the one which is connected to the RFID reader).
3)The encoder used at the transmitter end is HT12E.
a)The
TE pin of HT12E is connected to the PORT 2^4, the data pins of the HT12E is
connected to the port pins PORT 2^0, 2^1, 2^2, 2^3. The encoder is a 4 bit
encoder.
4)The LCD data pins are connected to port pins P1^2, P1^3,
P1^4, P^5. The RS pin of the LCD is connected to P1^0 and EN pin of the LCD is
connected to P1^1.
VERY IMPORTANT: At the transmitter side program, in
"uart.c" file in LINE 42 change the phone number to which the message
has to be sent and dump the code to the transmitter side board using RS232
cable.
5)For Tag number "10829126" message will be sent
as "Express train-16209"(16209 is just a random number to tell the train
number) and for Tag number "10819181" message will be sent as
"Passenger train-16600" and for any other cards it will send message
as "Goods train-11100".
Receiver side
1)The exit side IR is connected to the PORT 3^7.
2)The decoder used is HT12D.
a)The
VT pin of the HT12D is connected to the port 0^4 and the data lines of the
HT12D are connected to the port pins P0^0, P0^1, P0^2, P0^3. The decoder is a 4
bit decoder.
3)The stepper motor is connected to port pins P2^4, P2^5,
P2^6, P2^7.
4)There is NO NEED to change the code at the receiver side
and hence NO NEED to dump any program at the receiver side.
