Home Assistant - MQTT
26 August, 2018
21:36
RFLink-ESP, MQTT-mode
In the MQTT mode, RFLink-ESP communicates with an Home Automation program fully through the MQTT broker. In that case the serial port is used for debugging.
If an RF sequence is detected as valid by RFLink-ESP, it sends the information through the MQTT-broker:
If the Home Automation program sends a command through the MQTT-broker, RFLink checks if the message is valid, then it performs the action and sends a response back to the Home Automation program.
If RFLink-ESP is set to MQTT-mode, you can watch the serial line to see what the topic and payloads from the different switches are. Here the serial ouput is shown when 4 different switches are pressed:
From here it's easy to implement the Home Assistant counterpart, a few examples :
Button | Configuration.yaml | Home Assistant |
To activate the broker component |
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A simple Lamp Switch, Based on the second button in the above list
https://www.home-assistant.io/components/switch.mqtt/
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A Blind Cover, Based on the last button in the above list
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If we look at the communication on the MQTT bus, we can see the following traffic:
Line 1: Home Assistant commands to turn the light on
Line 2: RFLink-ESP acknowledges that the command is valid and executed (this will update the state of the icons in Home Assitant)
Line 3: Home Assistant commands to turn the light off
Line 4: RFLink-ESP acknowledges that the command is valid and executed
Line 5: Another remote control has turned the light on, this is the message to Home Assistant to change the state
Line 6: Another remote control has turned the light off
Sensors via MQTT
MQTT berichten worden goed ontvangen,
JSON parts kunnen worden onderscheiden
MQTT | Configuration.yaml | HomeAssistant |
huis/verdieping0/kamer1/CO3 { " CO2" :222, "CO3" : 3234, "CO4":111} |
- platform: mqtt state_topic: "huis/verdieping0/kamer1/CO3" name: "CO3b" sensors: CO3: unit_of_measurement: 'ppm' # value_template: "{{ value_json['CO3'] }}" value_template: > { "CO3": {{ value_json.CO3 }} } |
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- platform: mqtt state_topic: "huis/verdieping0/kamer1/CO3" name: "CO3c" sensors: CO4: unit_of_measurement: '%' # value_template: "{{ value_json['CO4'] }}" value_template: > { "CO4": {{ value_json.CO4 }} } |
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Template:
https://www.home-assistant.io/docs/configuration/templating/
https://www.home-assistant.io/docs/mqtt/processing_json/
Screen clipping taken: 28-Aug-18, 21:43
Screen clipping taken: 28-Aug-18, 21:43
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