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[randomuser123]

Re: [JSON](Zigbee und ein undefined)

Hi,
I recently bought a zigbee2tasmota device. I managed to set it up with the iobroker.sonoff adapter which allows me to read zigbee sensor values nicely.
But with the sonoff adapter I can not send control commands, for example to turn on a light or a socket.
To do that I understand that I have to send a mqtt command, but that is not possible with the sonoff adapter (afaik).
I can use another mqtt client, but then I don't have the feature of the sonoff adapter that splits up the mqtt json string into separate iobroker objects :-/

Here's what I would like to achieve:

• receive tasmota mqtt messages and split them up into separate objects
• send an mqtt command to tasmota. Ideally by setting for example "myFancyMqtt.0.ZigbeeLight.power = true" will send the appropriate command to my zigbee2tasmota device that will turn on the ZigbeeLight.

Is there any out-of-the-box solution available as of 2023?

[randomuser123]

Maybe this script https://forum.iobroker.net/topic/48945/tasmota-steckdosen-per-mqtt-javascript-direkt-ansteuern/23 can help, but I don't want to modify a script every time I add a new zigbee device...

[randomuser123]

Ok, I finally had time to find a solution. Thanks to chatGPT :-)

The zigbee2tasmota device is connected to a "regular" mqtt client in iobroker (not the sonoff adapter). When a zigbee message arrives it gets forwarded via mqtt to my iobroker as a json string.
My script parses that json and creates separate states for each of the key:value pairs in the json.

For sending commands I automatically add an additional state "PowerSet" to devices that have a "Power" state. When I update the PowerSet state, a script creates a json string and writes it into the "mqtt.0.cmnd.ZigbeeGateway.ZbSend" state (see https://tasmota.github.io/docs/Zigbee/#sending-device-commands)

The advantage of this approach is that I have nothing to do on the iobroker side when I add new zigbee devices, they are handled automatically.

That's it :-) Seems to work well so far. Here's the script in case anyone has a similar problem with zigbee2tasmota:

// ############## user config

// where the mqtt messages arrive
const zigbee2tasmotaSensorObjectId = 'mqtt.0.tele.ZigbeeGateway.SENSOR';
// where the states of the zigbee devices should appear
const zbBaseFolder = '0_userdata.0.zigbee2tasmota';
// ZbSend state, see https://tasmota.github.io/docs/Zigbee/#sending-device-commands
const zbsendObjId = 'mqtt.0.cmnd.ZigbeeGateway.ZbSend';

// ############## end user config

const regexPowerSetStr = `${zbBaseFolder}\\..*PowerSet$`;
const regexPowerSet = new RegExp(regexPowerSetStr);

// receive
on(zigbee2tasmotaSensorObjectId, (obj) => {
  const jsonString = obj.state.val;
  const jsonData = JSON.parse(jsonString);

  // log(`Received JSON string: ${jsonString}`);

  function createObjectsRecursively(parent, data) {
    for (const key in data) {
      const obj = data[key];
      const stateName = `${parent}.${key}`;

      if (typeof obj === 'object') {
        createObjectsRecursively(stateName, obj);
      } else {
        let value = obj;

        // custom handling of special data types
        if (key.toLowerCase() == 'time') {
          value = new Date(obj);
          log("found time")
        }

        // Check if the state already exists. If it does, just update the value.
        // If it does not exist (-> new zigbee device), create the states.
        if (!existsState(stateName)) {
          // If the state does not exist, create it and set the value
          createState(stateName, value, {
            name: key,
            type: typeof value,
            role: "value",
            read: true,
            write: true
          });
          log(`Created state ${stateName}`);

          // create additional state to set a new value that will be sent to the zigbee device.
          // If I use the normal "Power" state, I am afraid it will trigger the zbSend command 
          // everytime it gets updated from the zigbee device itself.
          if (stateName.endsWith("Power")) {
            let powerSetStateName = stateName + "Set"
            createState(powerSetStateName, !!value, {
              name: key + "Set",
              type: "boolean",
              role: "value",
              read: true,
              write: true
            });
            log(`Created state ${powerSetStateName}`);
          }
          // potentially add more custom handling for dimmer values, etc
          
        } else {
          setState(stateName, value);
        }
        // log(`set state ${parent}.${key} with value ${value}`);
      }
    }
  }

  createObjectsRecursively(zbBaseFolder, jsonData);
});

// send power on/off
on(regexPowerSet, (obj) => {
  const objId = obj.id;

  // probably regex is not needed and we can just take .Device or .Name

  // Define a regular expression to match the substring between "ZbReceived" and "PowerSet"
  const regex = /ZbReceived\.(.*?)\.PowerSet/;

  // Use the regular expression to extract the substring
  const match = objId.match(regex);

  if (match) {
    const zbname = match[1];

    let newValue = obj.state.val;
    let zbsendstring = "\{\"Device\": \"" + zbname + "\"\,\"Send\"\:\{\"Power\"\: "+newValue+"\}}"
    log("zbsend: " + zbsendstring)

    setState(zbsendObjId, zbsendstring)

  } else {
    log(`The substring between "ZbReceived" and "PowerSet" not found in ${objId}`);
  }
});

PS: sending zigbee commands is only supported for power on/off. I don't have any zigbee devices that have dimmer or hue values or anything else. I guess the script can be adapted to work with those kind of devices, too.