Controller for a DC 12V 2 Channel Serial Port RS232 Relay Board

The code for this is slowing being released in several different languages and flavours...

• C
• Cpp
• Qt Cpp
• Python

Device:

https://www.flyrobo.in/dc-12v-2-channel-serial-port-rs232-relay-module-board https://www.amazon.com.au/WQBYCBC-Universal-2-Channel-Professional-Portable/dp/B0BYKFJJGJ/

Information from manufactor:

This is DC 12V 2 Channel Serial Port RS232 Relay Module Board

Features:

• Interface: DB9 Female
• Easy to operate
• It supports 5V or 9-12V input voltage
• Improved stability, with a capacitor filter circuit.
• Serial instructions are single-byte instructions

• 2 Channel Relay Module;
• 2 Power input: DC 12V(8.5-13.5V).
• PC:Serial ports RS232 Control Relay;
• Power indicator : LED lights;
• Output indication : relay output with LED indicators,easy to see working status of the relay;
• Communication protocol: UART protocol communication, baud rate 9600kpbs, 8 data bits, one stop bit, no parity. Each data frame contains eight bytes. Two-way data transmission.
• Baud rate 9600kbps, 8 data bits, one stop bit, no parity. Each data frame contains eight bytes.
• PCB Size : 71x47mm

Control commands

Reading status(reading the status of the relay (on/off))

0x55 0x56 0x00 0x00 0x00 0x00 0x00 0xAB

Relay open (issue this command,Relay open,COM connect to NO)

Channel 1 : 0x55 0x56 0x00 0x00 0x00 0x01 0x01 0xAD

Channel 2 : 0x55 0x56 0x00 0x00 0x00 0x02 0x01 0xAE

Relay close (issue this command, Relay close, COM disconnect NO, and COM connect to NC)

Channel 1 : 0x55 0x56 0x00 0x00 0x00 0x01 0x02 0xAE

Channel 2 : 0x55 0x56 0x00 0x00 0x00 0x02 0x02 0xAF

Relay toggle(Relay status reversal, if COM connect to NO, this commands will Disconnect COM to NO and Reverse COM connect to NC, and vice versa)

Channel 1 : 0x55 0x56 0x00 0x00 0x00 0x01 0x03 0xAF

Channel 2 : 0x55 0x56 0x00 0x00 0x00 0x02 0x03 0xB0

Relay momentary(Relay COM connect to NO,disconnect after 200MS)

Channel 1 : 0x55 0x56 0x00 0x00 0x00 0x01 0x04 0xB0

Channel 2 : 0x55 0x56 0x00 0x00 0x00 0x02 0x04 0xB1

Once issue a command, will have return fame,7th byte of return fame mean the status of Relay.

Return command

Return relay open(return this command,mean COM connect to NO)

Channel 1 : 0x33 0x3C 0x00 0x00 0x00 0x01 0x01 0x71

Channel 2 : 0x33 0x3C 0x00 0x00 0x00 0x02 0x01 0x72

Return relay close(return this command,mean COM disconnect NO , and COM connect to NC)

Channel 1 : 0x33 0x3C 0x00 0x00 0x00 0x01 0x02 0x72

Channel 2 : 0x33 0x3C 0x00 0x00 0x00 0x02 0x02 0x73