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import paho.mqtt.client as mqtt
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import json
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import os
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import logging
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from datetime import datetime
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from influxdb import InfluxDBClient
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from dotenv import find_dotenv, load_dotenv
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load_dotenv(find_dotenv())
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SRC_MQTT_HOST = os.getenv("SRC_MQTT_HOST")
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SRC_MQTT_USER = os.getenv("SRC_MQTT_USER")
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SRC_MQTT_PASS = os.getenv("SRC_MQTT_PASS")
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DST_MQTT_HOST = os.getenv("DST_MQTT_HOST")
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DST_MQTT_USER = os.getenv("DST_MQTT_USER")
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DST_MQTT_PASS = os.getenv("DST_MQTT_PASS")
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DST_INFLUX_HOST = os.getenv("DST_INFLUX_HOST")
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DST_INFLUX_USER = os.getenv("DST_INFLUX_USER")
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DST_INFLUX_PASS = os.getenv("DST_INFLUX_PASS")
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DST_INFLUX_DB = os.getenv("DST_INFLUX_DB")
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OT_TOPIC="owntracks/tobru/dragino"
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OT_TID="dragino"
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def on_connect_ttn(client, userdata, flags, rc):
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logging.info("connected to ttn %s - %s", SRC_MQTT_HOST, str(rc))
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client.subscribe("+/devices/+/up")
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def on_connect_ot(client, userdata, flags, rc):
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logging.info("connected to ot %s - %s", DST_MQTT_HOST, str(rc))
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def on_publish_ot(client, userdata, rc):
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logging.info("published data to ot - %s", str(rc))
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# The callback for when a PUBLISH message is received from the server.
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def on_message_ttn(client, userdata, msg):
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data = json.loads(msg.payload)
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logging.info("message from ttn received for %s - #%s", data["dev_id"], data["counter"])
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logging.info("received via gw %s", data["gateways"][0]["gtw_id"])
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if data["payload_fields"]["latitude"]:
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# transform received data into OwnTracks format
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ot_data = json.dumps({
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"_type": "location",
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"lat": data["payload_fields"]["latitude"],
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"lon": data["payload_fields"]["longitude"],
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"batt": data["payload_fields"]["batV"],
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"t": "p",
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"tid": OT_TID,
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"tst": int(datetime.timestamp(datetime.now())),
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})
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# publish to owntracks
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logging.info("publishing data to owntracks")
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client_ot.publish(OT_TOPIC,ot_data)
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# write to influxdb
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logging.info("writing data to influxdb")
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influxdb.write_points(
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[
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{
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"measurement": "dragino",
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"tags": {
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"device": "lgt92",
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},
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"fields": {
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"bat": data["payload_fields"]["batV"],
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"pitch": data["payload_fields"]["pitch"],
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"roll": data["payload_fields"]["roll"],
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"lat": data["payload_fields"]["latitude"],
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"lon": data["payload_fields"]["longitude"],
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"alarm": int(data["payload_fields"]["alarm"]),
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}
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}
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]
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)
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else:
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logging.info("no GPS data present")
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logging.info("data processing done")
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logging.basicConfig(
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level=logging.INFO,
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format='%(asctime)s - %(message)s',
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datefmt='%Y-%m-%d %H:%M:%S %Z'
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)
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# Prepare InfluxDB
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influxdb = InfluxDBClient(
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host=DST_INFLUX_HOST,
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port=443,
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database=DST_INFLUX_DB,
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username=DST_INFLUX_USER,
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password=DST_INFLUX_PASS,
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ssl=True,
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verify_ssl=True,
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)
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# Prepare MQTT
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client_ttn = mqtt.Client()
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client_ttn.on_connect = on_connect_ttn
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client_ttn.on_message = on_message_ttn
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client_ttn.username_pw_set(SRC_MQTT_USER,SRC_MQTT_PASS)
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client_ttn.tls_set()
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client_ttn.connect(SRC_MQTT_HOST, 8883, 60)
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client_ot = mqtt.Client()
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client_ot.on_connect = on_connect_ot
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client_ot.on_publish = on_publish_ot
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client_ot.username_pw_set(DST_MQTT_USER,DST_MQTT_PASS)
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client_ot.tls_set()
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client_ot.connect(DST_MQTT_HOST, 8883, 60)
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try:
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# Connect to MQTT and react to messages
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client_ot.loop_start()
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client_ttn.loop_forever()
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except KeyboardInterrupt:
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client_ot.disconnect()
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client_ot.loop_stop()
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client_ttn.disconnect()
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client_ttn.loop_stop()
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logging.info("tschuess")
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