Implement gps tracking from LoRa Device

Configuration
1

I am struggling with adding a gps tracker to my hass.

Here is the json i am trying to extract data from:

{
  "channel": 0,
  "from": 621159684,
  "hops_away": 0,
  "id": 448070162,
  "payload": {
    "altitude": 457,
    "latitude_i": 16734000,
    "longitude_i": 400646000,
    "precision_bits": 32,
    "time": 1715343672
  },
  "rssi": -48,
  "sender": "!f71f0920",
  "snr": 10.25,
  "timestamp": 1715343672,
  "to": 4294967295,
  "type": "position"
}

This is my current code:

mqtt:
  sensor:
    - name: "LoRa_hesttest"
      state_topic: "msh/EU_433/2/json/LongFast/!f71f0920"
      value_template: >
        "latitude": {{ value_json['payload'].latitude_i }},
        "longitude": {{ value_json['payload'].longitude_i }}

  device_tracker:
    - name: "Hest"
      state_topic: "msh/EU_433/2/json/LongFast/!f71f0920"
      value_template: >
        "latitude": {{ value_json['payload'].latitude_i }},
        "longitude": {{ value_json['payload'].longitude_i }}

and here is the results i get so far:

Skjermbilde
Skjermbilde926×205 12.4 KB

I can read the fictive latitude and longitude on the test sensor i’ve created, but i cannot for the life of me translate it into a useable tracker.

2

The value_template defines the state of the entity and that’s not a valid state for a Device tracker.

I don’t use MQTT much, but I think you will want to use json_attribute_topic in this case.

3

I’ve tried with the json_attributes_topic, but since the json sends the lat and long as latitude_i and longitude_i, the device tracker does not read it correctly…

4

If changing that isn’t an possible, another option would be to set up an automation with an MQTT trigger that calls the device_tracker.see service.