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* e.g. to e.g., and proper case for Home Assistant * Instructions how to -> Instructions on how to
43 lines
1.3 KiB
Markdown
43 lines
1.3 KiB
Markdown
---
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layout: page
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title: "JSON MQTT Device Tracker"
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description: "Instructions on how to use JSON MQTT to track devices in Home Assistant."
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date: 2017-04-12 20:41
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sidebar: true
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comments: false
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sharing: true
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footer: true
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logo: mqtt.png
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ha_category: Presence Detection
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ha_version: 0.44
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ha_iot_class: depends
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---
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The `mqtt_json` device tracker platform allows you to detect presence by monitoring an MQTT topic for new locations. To use this platform, you specify a unique topic for each device.
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To use this device tracker in your installation, add the following to your `configuration.yaml` file:
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```yaml
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# Example configuration.yaml entry
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device_tracker:
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- platform: mqtt_json
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devices:
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paulus_oneplus: location/paulus
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annetherese_n4: location/annetherese
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```
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Configuration variables:
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- **devices** (*Required*): List of devices with their topic.
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- **qos** (*Optional*): The QoS level of the topic.
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This platform receives JSON formatted payloads containing GPS information, for example:
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```json
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{"longitude": 1.0,"gps_accuracy": 60,"latitude": 2.0,"battery_level": 99.9}
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```
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Where `longitude` is the longitude, `latitude` is the latitude, `gps_accuracy` is the accuracy in meters, `battery_level` is the current battery level of the device sending the update.
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`longitude` and `latitude` are required keys, `gps_accuracy` and `battery_level` are optional.
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