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#!/usr/bin/env python3
import os
import sys
import json
import psycopg2
import paho.mqtt.client as mqtt
mqtt_server = os.environ['el_mqtt_server']
mqtt_port = int(os.environ['el_mqtt_port'])
keepalive = int(os.environ['el_mqtt_keepalive'])
mqtt_topic = os.environ['el_mqtt_topic']
pg_db = os.environ['el_pg_db']
pg_host = os.environ['el_pg_host']
pg_user = os.environ['el_pg_user']
pg_pass = os.environ['el_pg_pass']
pg_table = "mqtt_temps"
# The callback for when the client receives a CONNACK response from the server.
def on_connect(client, userdata, flags, rc):
print("Connected with result code "+str(rc))
# Subscribing in on_connect() means that if we lose the connection and
# reconnect then subscriptions will be renewed.
client.subscribe(mqtt_topic)
# The callback for when a PUBLISH message is received from the server.
def on_message(client, userdata, msg):
if msg.topic.startswith('zigbee2mqtt/tmp'):
#print("TMP!! - " + msg.topic.split('/')[1])
data = json.loads(msg.payload)
if 'temperature' in data and 'humidity' in data:
values = (msg.topic.split('/')[1], data['temperature'], data['humidity'], data['battery'], data['linkquality'], data['voltage'])
print(values)
todb(values)
# Write values to database
def todb(values):
conn = psycopg2.connect(database=pg_db, host=pg_host, user=pg_user, password=pg_pass)
cur = conn.cursor()
try:
cur.execute("INSERT INTO " + pg_table + " (name, temperature, humidity, battery, linkquality, voltage) VALUES(%s,%s,%s,%s,%s,%s)", values)
conn.commit()
except (Exception, psycopg2.Error) as error:
conn.rollback()
print("Error while connecting to PostgreSQL", error)
raise error
finally:
cur.close()
conn.close()
# mqtt
client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message
client.connect(mqtt_server, mqtt_port, keepalive)
# Blocking call that processes network traffic, dispatches callbacks and
# handles reconnecting.
# Other loop*() functions are available that give a threaded interface and a
# manual interface.
client.loop_forever()
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