Light powered by MODBUS switch

Configuration
1

Hi Guys,

I have a Modbus board of switches and want to use them in a variety of applications. It worked before when I tried to describe the light in a simple statement with the Modbus as a hub to call, but I want to make it a bit more modular, defining the light function through the switch. So, I thought to do something like:

modbus:
  - name: swbf2
    type: tcp
    host: swb-f2
    port: 17000

switch:
  - platform: modbus
    scan_interval: 5
    coils:
    - name: switch1
      hub: swbf2
      coil: 0
      slave: 0
      command_on: 1
      command_off: 0
      verify_state: true

light:
  - platform: switch
    name: GuestRoom_MainLight
    entity_id: switch.switch1

I see that am getting the following error:
2021-06-16 16:48:57 ERROR (MainThread) [homeassistant.components.switch] Error while setting up modbus platform for switch
Traceback (most recent call last):
File “/home/homeassistant/lib/python3.8/site-packages/homeassistant/helpers/entity_platform.py”, line 250, in _async_setup_platform
await asyncio.shield(task)
File “/home/homeassistant/lib/python3.8/site-packages/homeassistant/components/modbus/switch.py”, line 25, in async_setup_platform
for entry in discovery_info[CONF_SWITCHES]:
TypeError: ‘NoneType’ object is not subscriptable

I see that the HA is trying to communicate to the modbus server, just okay, and it keeps the connection running. Any ideas?

Thanks in advance,
Regards Matt

2

It’s switches instead of switch!!!

switches:

  • platform: modbus
    scan_interval: 5
    coils:
    • name: switch1
      hub: swbf2
      coil: 0
      slave: 0
      command_on: 1
      command_off: 0
      verify_state: true
3

Jakke17,

Thanks a lot man! I will try it out as soon as I will get the power into the module. I am new to the HA and was following the documentation, where the example is:

 sensor:
   - platform: mqtt
     state_topic: "home/bedroom/temperature"
     name: "MQTT Sensor 1"
   - platform: mqtt
     state_topic: "home/kitchen/temperature"
     name: "MQTT Sensor 2"
   - platform: rest
     resource: "http://IP_ADDRESS/ENDPOINT"
     name: "Weather"
 
 switch:
   - platform: vera

Why the difference? Any other things like this I need to be aware of?

Cheers

4

If you are using/upgrading to Home Assistant version 2021.7, make sure to change your format according to Modbus - Configuring Platform Switch - otherwise it will break.

5

Good morning Ardy,

Just to clarify, these (-s)'es are specific to the modbus implementation and in the rest of HA it is still plan switch, light, etc., correct?

Thank you,
Regards

6

The link that I posted previously is only for Modbus Integration. To configure other integration, I suggest you refer to the current documentation in case something changes in the recent updates.

1 Like
7

Thank you Ardy!