94 lines
2.2 KiB
Python
94 lines
2.2 KiB
Python
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#!/usr/bin/python
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import sys, string, time, atexit
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import paho.mqtt.client as mqtt
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# ---- Configuration START ----
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topic = 'neues-haus/keller/tele/werkstatt/'
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mqttBroker = '192.168.0.11'
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mqttPort = 1883
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mqttuser = 'werkstatt-pi'
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mqttpasswort = 'h#st0$HYWq1Z2*'
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valuesFile = '/opt/1wire/output'
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maxDataAge = 300 # [s]
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minTemp = -10.0 # [°C], for simple sanity check
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maxTemp = 35.0 # [°C], for simple sanity check
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debug = True
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# ---- Configuration END ----
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# MQTT init
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def on_connect(client, userdata, flags, rc, properties):
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if rc != 0:
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print("Connection to MQTT broker failed with rc = ", rc)
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try:
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client = mqtt.Client(mqtt.CallbackAPIVersion.VERSION2, 'werkstatt-pi')
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client.username_pw_set(mqttuser, mqttpasswort)
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client.on_connect = on_connect
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client.connect(mqttBroker, port=mqttPort)
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client.loop_start()
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except:
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print('Connection to MQTT broker failed')
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sys.exit()
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# Function definitions
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def exit_handler():
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client.publish(topic + 'LWT', 'Offline', 0, True)
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def getValues():
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values = {}
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with open(valuesFile,"r") as f:
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for line in f:
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if debug:
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print('line = ' + line)
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splitted = line.split('=')
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if len(splitted) == 2:
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values[splitted[0].strip()] = splitted[1].strip()
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return values
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def publishMetrics():
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payload = '{ "timestamp": "' + values['Timestamp'] + '"'
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for key in ['LuftTemp', 'WasserTemp', 'BodenTemp']:
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if key in values and float(values[key]) >= minTemp and float(values[key]) <= maxTemp:
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payload = payload + ', "' + key + '": "' + values[key] + '"'
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if debug:
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print(key + ' = ' + values[key] + ' °C')
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payload = payload + ' }'
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if debug:
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print('payload = ' + payload)
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client.publish(topic + 'SENSOR', payload)
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# Main
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client.publish(topic + 'LWT', 'Online', 0, True)
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atexit.register(exit_handler)
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while(1):
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values = getValues()
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if not 'Timestamp' in values:
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continue
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dataAge = int(time.time() - int(values['Timestamp']))
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if debug:
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print('Data age = ' + str(dataAge) + ' seconds')
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if dataAge > maxDataAge:
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continue
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publishMetrics()
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time.sleep(60)
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