lorawan/receiver/ttn-receiver.py

62 lines
1.7 KiB
Python
Raw Normal View History

2016-10-10 13:27:55 +00:00
# node.py
# Simple Python client to show node activity from ttn MQTT brooker with credentials
# Author: R.Schimmel
# www.schimmel-bisolutions.nl
# first install paho.mqtt.client: pip install paho-mqtt
#
import paho.mqtt.client as mqtt
import psycopg2
import json
import base64
import os
#Call back functions
# gives connection message
def on_connect(client,userdata,rc):
print("Connected with result code:"+str(rc))
# subscribe for all devices of user
client.subscribe('+/devices/+/up')
# gives message from device
def on_message(client,userdata,msg):
myjson = msg.payload.decode('utf-8')
mydict = json.loads(myjson)
deveui = mydict['dev_eui']
payload = base64.b64decode(mydict['payload']).decode('utf-8')
print("{}: {}".format(deveui, payload))
insert_json("ttn", myjson, payload, deveui)
def on_log(client,userdata,level,buf):
print("message:" + msg)
print("userdata:" + str(userdata))
def insert_json(provider, data, payload='', deveui=''):
try:
conn = psycopg2.connect("dbname=lorawan")
cursor = conn.cursor()
cursor.execute("insert into packets values (DEFAULT, DEFAULT, %s, %s, %s, %s)", (provider, data, payload, deveui))
cursor.connection.commit()
conn.close()
except Exception as e:
print("DB Insert failed: %s" % e)
if __name__ == '__main__':
mqttc= mqtt.Client()
mqttc.on_connect=on_connect
mqttc.on_message=on_message
print("Connecting to ttn")
username=os.environ['ttn_user']
password=os.environ['ttn_password']
mqttc.username_pw_set(username, password)
mqttc.connect("staging.thethingsnetwork.org",1883,10)
# and listen to server
print("Listening via mqtt")
run = True
while run:
mqttc.loop()