kc868-A6 relay module RS485 communication

[Joseph.o]

hello,
i want to connect the kc868-A6 with a 8 input 8 output rs485 relay.
is there any source code that can use it or start with?

[admin]

if you want extend relay by this board, you can write arduino code for RS485.
just write code for modbus. A6 work as "MASTER", your relay board is "SLAVE".