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#!/usr/bin/env python3
''' Listen for mqtt-events, and trigger for some '''
import os
import json
from datetime import datetime
import paho.mqtt.client as mqtt
from common import dbi
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']
# 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):
name = msg.topic.split('/')[1]
data = json.loads(msg.payload)
if name.startswith('tmp') and 'temperature' in data and 'humidity' in data:
sql = "INSERT INTO mqtt_temps (name, temperature, humidity, battery, linkquality, voltage, time) VALUES(%s,%s,%s,%s,%s,%s,%s)"
values = (name, data['temperature'], data['humidity'], data['battery'], data['linkquality'], data['voltage'], datetime.utcnow())
elif name == 'HAN' and 'current' in data:
sql = "INSERT INTO mqtt_han (name, current, power, voltage, linkquality, time) VALUES(%s,%s,%s,%s,%s,%s)"
values = (name, data['current'], data['power'], data['voltage'], data['linkquality'], datetime.utcnow())
else:
return
dbi(sql, values, verbose=True)
# 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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