78 lines
2.5 KiB
Python
78 lines
2.5 KiB
Python
"""
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Support for GPS tracking MQTT enabled devices.
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For more details about this platform, please refer to the documentation at
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https://home-assistant.io/components/device_tracker.mqtt_json/
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"""
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import json
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import logging
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import voluptuous as vol
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from homeassistant.components import mqtt
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from homeassistant.core import callback
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from homeassistant.components.mqtt import CONF_QOS
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from homeassistant.components.device_tracker import PLATFORM_SCHEMA
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import homeassistant.helpers.config_validation as cv
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from homeassistant.const import (
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CONF_DEVICES, ATTR_GPS_ACCURACY, ATTR_LATITUDE,
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ATTR_LONGITUDE, ATTR_BATTERY_LEVEL)
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DEPENDENCIES = ['mqtt']
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_LOGGER = logging.getLogger(__name__)
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GPS_JSON_PAYLOAD_SCHEMA = vol.Schema({
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vol.Required(ATTR_LATITUDE): vol.Coerce(float),
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vol.Required(ATTR_LONGITUDE): vol.Coerce(float),
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vol.Optional(ATTR_GPS_ACCURACY): vol.Coerce(int),
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vol.Optional(ATTR_BATTERY_LEVEL): vol.Coerce(str),
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}, extra=vol.ALLOW_EXTRA)
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PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(mqtt.SCHEMA_BASE).extend({
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vol.Required(CONF_DEVICES): {cv.string: mqtt.valid_subscribe_topic},
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})
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async def async_setup_scanner(hass, config, async_see, discovery_info=None):
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"""Set up the MQTT JSON tracker."""
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devices = config[CONF_DEVICES]
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qos = config[CONF_QOS]
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for dev_id, topic in devices.items():
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@callback
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def async_message_received(topic, payload, qos, dev_id=dev_id):
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"""Handle received MQTT message."""
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try:
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data = GPS_JSON_PAYLOAD_SCHEMA(json.loads(payload))
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except vol.MultipleInvalid:
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_LOGGER.error("Skipping update for following data "
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"because of missing or malformatted data: %s",
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payload)
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return
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except ValueError:
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_LOGGER.error("Error parsing JSON payload: %s", payload)
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return
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kwargs = _parse_see_args(dev_id, data)
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hass.async_create_task(async_see(**kwargs))
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await mqtt.async_subscribe(
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hass, topic, async_message_received, qos)
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return True
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def _parse_see_args(dev_id, data):
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"""Parse the payload location parameters, into the format see expects."""
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kwargs = {
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'gps': (data[ATTR_LATITUDE], data[ATTR_LONGITUDE]),
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'dev_id': dev_id
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}
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if ATTR_GPS_ACCURACY in data:
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kwargs[ATTR_GPS_ACCURACY] = data[ATTR_GPS_ACCURACY]
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if ATTR_BATTERY_LEVEL in data:
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kwargs['battery'] = data[ATTR_BATTERY_LEVEL]
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return kwargs
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