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    Connect Sonoff running Tasmota

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    • R
      ragflyer last edited by

      Tasmota is a popular open firmware for the Sonoff switches. It features a MQTT interface and I thought it would be good to connect it to Mycontroller.
      I couldn't configure Tasmota to publish in a Mysensors compatible format.
      Topic is configurable, but the last part and paypload are fixed and would have to be changed in the sourcecode.

      Messages of Tasmota look like this:

      00:00:08 MQT: mygateway-in/25/1/1/0/2/RESULT = {"POWER2":"OFF"}
      00:00:08 MQT: mygateway-in/25/1/1/0/2/POWER2 = OFF
      00:00:09 MQT: mygateway-in/25/1/1/0/2/RESULT = {"POWER1":"OFF"}
      00:00:09 MQT: mygateway-in/25/1/1/0/2/POWER1 = OFF
      12:00:22 MQT: mygateway-in/25/1/1/0/2/STATE = {"Time":"2018.05.09 12:00:22","Uptime":"0 00:00:15","Vcc":3.499,"POWER1":"OFF","POWER2":"OFF","Wifi":{"AP":1,"SSId":"2.4GHz","RSSI":78,"APMac":"46:..."}}
      12:02:00 MQT: mygateway-in/25/1/1/0/2/UPTIME = {"Time":"2018.05.09 12:02:00","Uptime":"0 00:01:53"}
      12:05:22 MQT: mygateway-in/25/1/1/0/2/STATE = {"Time":"2018.05.09 12:05:22","Uptime":"0 00:05:15","Vcc":3.499,"POWER1":"OFF","POWER2":"OFF","Wifi":{"AP":1,"SSId":"2.4GHz","RSSI":82,"APMac":"46:..."}}

      Any idea what would be the quickest way to make these devices compatible?

      Communication of Tasmota: https://github.com/arendst/Sonoff-MQTT-OTA-Arduino/wiki/MQTT-for-Newbies

      jkandasa 1 Reply Last reply Reply Quote 0
      • jkandasa
        jkandasa @ragflyer last edited by

        @ragflyer topic last character and payload should be parsed with a custom provider. Kindly create a feature request on GitHub Page.

        On the ticket add supporting documents for this ticket. I will work on this when I have time.

        Thank you!

        1 Reply Last reply Reply Quote 0
        • R
          ragflyer last edited by ragflyer

          Found a workaround using Node-Red, for newbies like me this might be helpful:

          Flash Tasmota to your Sonoff,
          set MQTT topic to e.g. sonoff-1234,
          full topic to e.g. /smarthome/%prefix%/%topic%/

          Install Node-Red, add node-red-dashboard.
          Drag a MQTT input, set topic to /smarthome/stat/sonoff-1234/POWER
          Add a switch, uncheck "If msg arrives on input, pass through to output:", let it show state of the input, set on payload to String "ON", off payload to "OFF"
          Add a MQTT output, set topic to /smarthome/cmnd/sonoff-1234/power

          Now you should have a working switch on the Node-Red dashboard, it should always show the state of the sonoff.

          To show the state of the switch in Mycontroller, add a Function and connect it to MQTT input:
          if (msg.payload == "ON") {
          msg.payload = 1;
          } else if(msg.payload == "OFF") {
          msg.payload = 0;
          }
          return msg;

          There is a replace function for message payloads, you could use that instead.
          Connect a MQTT output to the function, set topic to
          mygateway-out/<id>/<child-id>/1/0/2

          This will post the converted on/off message to mysensors format to be read by the mycontroller mqtt gateway.

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