It is simply to control the keypad, just only use ‘read’ system call, the
subsequently section therefore only discusses how to control the RFID
module.
3-5-2 Controlling the RFID Module
To control the RFID module, a user needs to use the following
commands to RFID reader.
1. Read a block:
Request: 0x1B, ‘r’, block number
Response: 0x1B, data byte-count, RspData
0x1B, 0x05, “Fail!”
EX: Request: 0x1B, ‘r’, 0x01
Response: 0x1B, 0x05, 0x00, 0x01, 0x02, 0x03, 0x04
2. Write a block:
Request: 0x1B, ‘w’, block number, data
Response: 0x1B, 0x05, “Done!”
0x1B, 0x05, “Fail!”
EX: Request: 0x1B, ‘w’, 0x01, 0x01, 0x02, 0x03, 0x04
Response: 0x1B, 0x05, “Done!”
3. Read UID:
Request: 0x1B, ‘i’
Response: 0x1B, data byte-count, RspData
0x1B, 0x05, “Fail!”
EX: Request: 0x1B, ‘i’
Response: 0x1B, 0x0E, 0x0F, 0x79, 0x66, 0x47, 0x01, 0x00,
0x00, 0x07, 0xE0, 0x00, 0x00, 0x3F, 0x03, 0x87
4. Change the baud rate:
Request: 0x1B, ‘B’, 0x00 (4800bps)
0x1B, ‘B’, 0x01 (9600bps)
0x1B, ‘B’, 0x02 (14400bps)
0x1B, ‘B’, 0x03 (19200bps)
0x1B, ‘B’, 0x04 (28800bps)
0x1B, ‘B’, 0x05 (38400bps)
54
