MQTT autodiscovery

[Piacco]

I’m using pv2mqtt to read out my APsystems solar panels via MQTT autodiscovery. The output is shown below. I receive all values in Domoticz except for the Wh value.
I don't know why the Wh value isn’t showing up in Domoticz an how can I fix this?

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{
  "device": {
    "identifiers": [
      "xxxxxxxx"
    ],
    "manufacturer": "APsystems",
    "model": "DS3",
    "name": "Inverter xxxxxxxx",
    "sw_version": "V2284"
  },
  "device_class": "energy",
  "enabled_by_default": true,
  "force_update": true,
  "name": "Energy",
  "state_class": "total_increasing",
  "state_topic": "pv2mqtt/inverter/xxxxxxxx",
  "unit_of_measurement": "kWh",
  "unique_id": "pv2mqtt_xxxxxxxx_WH",
  "value_template": "{{ value_json.WH / 1000 | round(3) }}"
}

Output of the mqtt topic

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{"AphA": 0.17, 
"AphB": null, 
"AphC": null, 
"PhVphA": 232.0, 
"PhVphB": null, 
"PhVphC": null, 
"W": 8.0, 
"VA": 40.7, 
"VAr": 40.0, 
"WH": 470.0, 
"PF": 0.196, 
"Hz": 50.0, 
"TmpCab": 17.0, 
"TmpSnk": null, 
"TmpTrns": null, 
"TmpOt": null}

[waltervl]

Probably because there are calculations in the value template. Domoticz does not support that.

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"value_template": "{{ value_json.WH / 1000 | round(3) }}"

For Domoticz this probably would be enough:

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  "unit_of_measurement": "Wh"
"value_template": "{{ value_json.WH }}"

[Piacco]

I can't change the template, so this has to be done with node red or are there other solutions?

[waltervl]

Or ask pv2mqtt to change the config topic. Or modify the application yourself.
You can send your own modified config topic with for example MQTT explorer or mosquito_pub to test what is the correct config topic

[waltervl]

When I look in the file pv2mqtt.py the config topic is hardcoded so you can change it yourself to test.
https://github.com/MartijnVdS/pv2mqtt/b ... pv2mqtt.py

[Piacco]

Tanks, I've changed the pv2mqtt.py and rebuild the container, the value is now send to Domoticz, I've only contvert it from Wh to kWh, so this can be done with DzVents.

[waltervl]

You shouldnt. Domoticz needs Wh values, not kwh. Domoticz does the calculation to kwh for you.
So change the value template and the unit of measure as I already explained.

[Piacco]

I’ll have a closer look at it tomorrow, but this is how Domoticz is receiving the values.
These are day value's, this must be 0,474kWh 0,816kWh and 0,937kWh

Domoticz.JPG (19.7 KiB) Viewed 230 times

[waltervl]

You because you did not do what I advised......
Change into the pv2mqtt.py config topic

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"unit_of_measurement": "Wh"
"value_template": "{{ value_json.WH }}"

[Piacco]

Oops, my reading skills are not the best! You were right—I've switched it to 'Wh' and voilà, the values are finally behaving. Thanks again!"

[Piacco]

The device is showing up as General kWh, Electricity (instant and counter), these device needs two value's instant and counter, how do i get the instant value into the device? The value instant W is available.

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{
  "device": {
    "identifiers": [
      "xxxxxxx"
    ],
    "manufacturer": "APsystems",
    "model": "DS3",
    "name": "Inverter xxxxxxx",
    "sw_version": "V2284"
  },
  "device_class": "power",
  "enabled_by_default": true,
  "force_update": true,
  "name": "Power",
  "state_class": "measurement",
  "state_topic": "pv2mqtt/inverter/xxxxxxx",
  "unit_of_measurement": "W",
  "unique_id": "pv2mqtt_xxxxxxx_W",
  "value_template": "{{ value_json.W }}"
}

[waltervl]

I have no Idea how the counter value should be added with MQTT autodiscover.

[FlyingDomotic]

Neither me... but if you can't find a way with MQTT Autodiscovery, yo may have a look at https://github.com/FlyingDomotic/domoti ... per-plugin.
An example of MqttMapper configuration file could be:

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"My KWh counter" : {
		"topic": "pv2mqtt/inverter/xxxxxxxx",
		"type": "248", "subtype": "1", "switchtype": "0",
		"mapping": {"item": "W;WH"}
}