Sonoff Tasmota with BME280

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Hello, together.
I have a problem with the representation of some devices.
I would like to select the data bme280 from sonoff with tasmota about mqtt.
What do I have to do in gets put around to these data to have?

Hey @Thrusty
You need install msg broker (eg. Mosquitto) and pimatic-mqtt plugin.
Then just add the MqttSensor device.

    {
      "attributes": [
        {
          "name": "BME280.pressure",
          "topic": "tasmota/topic/for/pressure",
          "type": "number",
          "unit": "hPa",
          "acronym": "p",
          "messageMap": {}
        },
        {
          "name": "BME280.Humidity",
          "topic": "tasmota/topic/for/humidity",
          "type": "number",
          "unit": "%",
          "acronym": "rH",
          "messageMap": {}
        }
      ],
      "xAttributeOptions": [],
      "id": "bme280",
      "name": "bme280",
      "class": "MqttSensor"
    }

@wutu Thanks for the Hint.
I will test it in the evening.
I have mqtt allready installed and its running with any sonoff’s. But without sensors.

Hello, over again,
unfortunately, does not function with me. Possibly it lies in topic.
this shows the Console of the Sonoff me here:

@Thrusty Hi, pls show your device config and data from tasmota in text form.

Now it seems to work.
Exactly with the settings from @wutu
Unfortunately, with problems. I have BME280.Temperature added.

Anyhow my Mosquito system seems to be dirty.
Are the queries limited to the broker?
A new start of Mosquito has not helped.
Where from this mistake can come.

@Thrusty This is most common in the collision of two identical ClientIDs. Look into the log from Mosquitto.

stop Mosquitto
sudo /etc/init.d/mosquitto stop
run in the foreground
sudo /usr/sbin/mosquitto -v -c /etc/mosquitto/mosquitto.conf

@wutu In the Mosquitto log I can read this:

 Socket error on client pimatic_b5c082a7, disconnecting.
1506146198: New connection from 127.0.0.1 on port 1883.
1506146198: New client connected from 127.0.0.1 as pimatic_b5c082a7 (c1, k60).
1506146198: Empty subscription string from 127.0.0.1, disconnecting.
1506146198: Socket error on client pimatic_b5c082a7, disconnecting.
1506146200: New connection from 127.0.0.1 on port 1883.
1506146200: New client connected from 127.0.0.1 as pimatic_b5c082a7 (c1, k60).
1506146200: Empty subscription string from 127.0.0.1, disconnecting.
1506146200: Socket error on client pimatic_b5c082a7, disconnecting.
1506146201: New connection from 127.0.0.1 on port 1883.

@Thrusty Do you miss a topic on some device?
Then it is necessary to restart Pimatic.

@wutu Unfortunately, a new start has not repaired the mistake.
Now I have completely extinguished the MQTTSensor Device and the mistake is away. However, unfortunately, this is not the solution.

Now I have it.
I have anew provided the MQTTSensor Device. And then every sensor individually added.
Now it seems to work.

Many thanks for the help. Sometimes one needs a shove in the right direction.