73 lines
1.9 KiB
Python
73 lines
1.9 KiB
Python
# node.py
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# Simple Python client to show node activity from ttn MQTT brooker with credentials
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# Author: R.Schimmel
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# www.schimmel-bisolutions.nl
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# first install paho.mqtt.client: pip install paho-mqtt
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#
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# Enhanced for lorawan in Digital Glarus by Nico Schottelius (nico.schottelius -at- ungleich.ch)
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#
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import paho.mqtt.client as mqtt
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import psycopg2
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import json
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import base64
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import os
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import logging
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import lorautil
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log = logging.getLogger(__name__)
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#Call back functions
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# gives connection message
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def on_connect(client,userdata,rc):
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print("Connected with result code:"+str(rc))
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# subscribe for all devices of user
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client.subscribe('+/devices/+/up')
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# gives message from device
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def on_message(client,userdata,msg):
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myjson = msg.payload.decode('utf-8')
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mydict = json.loads(myjson)
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deveui = mydict['dev_eui']
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try:
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payload = base64.b64decode(mydict['payload']).decode('utf-8')
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except UnicodeDecodeError as e:
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log.info("Cannot decode packet as utf-8")
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payload = mydict['payload']
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log.info("Message received: {}: {}".format(deveui, payload))
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lorautil.db_insert_json("ttn", myjson, payload, deveui)
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lorautil.db_notify("ttn", payload, deveui)
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def on_log(client,userdata,level,buf):
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log.debug("message:" + msg)
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log.debug("userdata:" + str(userdata))
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def on_disconnect(client, userdata, rc):
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log.debug("reconnecting...")
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client.reconnect()
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if __name__ == '__main__':
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logging.root.setLevel(logging.DEBUG)
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mqttc= mqtt.Client()
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mqttc.on_connect=on_connect
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mqttc.on_message=on_message
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mqttc.on_disconnect=on_disconnect
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print("Connecting to ttn")
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username=os.environ['ttn_user']
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password=os.environ['ttn_password']
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mqttc.username_pw_set(username, password)
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mqttc.connect("staging.thethingsnetwork.org",1883,10)
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# and listen to server
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log.info("Listening via mqtt")
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run = True
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while run:
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mqttc.loop()
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