Get light status over MQTT

Configuration
1

Hi!

I try to configure the MQTT connection between Home Assistant and HomeGenie. HomeGenie is the MQTT server, and publish 1 light switch. I can see the communication between each other with MQTT.fx program. So I can figure out, how can I control the light switch from Home Assitant. It works fine. This is the config:

light:

  • platform: mqtt
    name: “teszt light”
    state_topic: “hg_master/HomeAutomation.NetworkRelays/1/event”
    command_topic: “ha_master/MQTT.Listeners/hg_master/command”
    state_value_template: “{{ value_json.Value }}”
    qos: 0
    payload_on: “{ ‘Domain’: ‘HomeAutomation.NetworkRelays’, ‘Address’ : ‘1’, ‘Command’ : ‘Control.On/undefined’ }”
    payload_off: “{ ‘Domain’: ‘HomeAutomation.NetworkRelays’, ‘Address’ : ‘1’, ‘Command’ : ‘Control.Off/undefined’ }”
    optimistic: true

I’d like to read the light status. The topic is:

mqtt status
mqtt status1910×1022 135 KB

And the value:

{“Name”:“Status.Level”,“Value”:"0",“Description”:“”,“FieldType”:“”,“UpdateTime”:“2017-08-08T17:31:21.784735Z”,“NeedsUpdate”:false}

If the Value = 0 the light is off, if Value = 1, the light is on.
How can I read the light status (on/off) from this topic?

2

Hi!

Can somebody help to me? I can’t figure out, how can I read the switch state :frowning:

Thanks!

3

I believe the MQTT Template Light will do what you need, but I have never used it so this is something of a guess

light:
  - platform: mqtt_template
    command_topic: "ha_master/MQTT.Listeners/hg_master/command"
    command_on_template: "{ ‘Domain’: ‘HomeAutomation.NetworkRelays’, ‘Address’ : ‘1’, ‘Command’ : ‘Control.On/undefined’ }"
    command_off_template: "{ ‘Domain’: ‘HomeAutomation.NetworkRelays’, ‘Address’ : ‘1’, ‘Command’ : ‘Control.Off/undefined’ }"
    state_topic: "hg_master/HomeAutomation.NetworkRelays/1/event"
    state_template: "{{ value_json.Value }}"

I’m not sure about the state_template resulting in 0 or 1 though. For the mqtt_light you have to add

    payload_off: 0
    payload_on: 1

but they aren’t listed as parameters for the template light, so I don’t know if that will work.

Edit 2:
You might be able to do something like

    state_template:
{% if value_json.Value == 1 -%}
"on"
{% else -%}
"off"
{% endif -%}

but this is way beyond my templating experience.

4

Thanks for your help!

I try your suggestion, but unfortunately it can’t read light state. Control works fine.
My config:

light:
  - platform: mqtt_template
    name: "teszt light"
    command_topic: "ha_master/MQTT.Listeners/hg_master/command"
    command_on_template: "{ 'Domain': 'Relays.NetworkRelays1', 'Address' : '2', 'Command' : 'Control.On/undefined' }"
    command_off_template: "{ 'Domain': 'Relays.NetworkRelays1', 'Address' : '2', 'Command' : 'Control.Off/undefined' }"
    state_topic: "hg_master/Relays.NetworkRelays1/2/event"
    state_template: >-
      {% if value_json.Value == "1" %}"ON"
      {% else %}"OFF"
      {% endif %}
    payload_on: "ON"
    payload_off: "OFF"
    optimistic: true

I try payload on=1, payloadon=“1”, payload on=“ON”, payload on=ON, and value_json.Value==1, value_json.Value==“1”, but nothing change :frowning:

5

In the log I received this message:

2017-08-22 09:28:40 WARNING (MainThread) [homeassistant.components.light.mqtt_template] Invalid state value received

6

Unfortunately the mqtt_template not working well. But I figured out the other solution. In HomeGenie, I modify the MQTT program. Added the “state” topic which return the same parameter as the command topic.

payload_on: { ‘Domain’: ‘Relays.NetworkRelays1’, ‘Address’ : ‘1’, ‘Command’ : ‘Control.On/undefined’ }
payload_off: { ‘Domain’: ‘Relays.NetworkRelays1’, ‘Address’ : ‘1’, ‘Command’ : ‘Control.Off/undefined’ }

So in this case it works fine with simple mqtt component.

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