KC868-A16 work with relay board by RS485 modbus in ESPHome

[admin]

how to wire? why not let 4pcs of A16 board all connect to your router by network cable?

[Dario]

how to wire? why not let 4pcs of A16 board all connect to your router by network cable?

RS485. Maybe its the wrong method, but I would like to make them communicate even when the network might be down. 1 can be connected straight to a HA server.

[admin]

ok, if you want to add 4pcs A16 board on one modbus , just need to add "modbus_controller_id", here is example of use 2pcs A16 board:

modbus_controller:
- id: a16a
address: 1
modbus_id: modbus1
update_interval: 3s

modbus_controller:
- id: a16b
address: 1
modbus_id: modbus1
update_interval: 3s

switch:

- platform: modbus_controller
modbus_controller_id: a16a
name: 'modbus-switch1'
address: 0 # 0:relay1 1:relay2 ......
register_type: coil
bitmask: 1

- platform: modbus_controller
modbus_controller_id: a16b
name: 'modbus-switch1'
address: 0 # 0:relay1 1:relay2 ......
register_type: coil
bitmask: 1