98 lines
2.8 KiB
Python
98 lines
2.8 KiB
Python
import time
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import board
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import adafruit_dht
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import psutil
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import random
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from paho.mqtt import client as mqtt_client
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name = 'test'
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broker = '192.168.0.196'
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port = 1883
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tempTopic = "home/office/climate/temp"
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humidTopic = "home/office/climate/humid"
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username = 'mqtt'
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password = 'falrenforbreakfast'
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client_id = f'python-mqtt-office-{random.randint(0, 1000)}'
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#Function Definitions
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def connect_mqtt():
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def on_connect(client, userdata, flags, rc):
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if rc == 0:
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print("Connected to MQTT Broker!")
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else:
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print("Failed to connect, return code %d\n", rc)
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client = mqtt_client.Client(client_id)
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client.username_pw_set(username, password)
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client.on_connect = on_connect
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client.connect(broker, port)
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return client
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def getValues(sensor):
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#While loop to try sensor again if it fails, seems to happen occasionally
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result = None
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while result is None:
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try:
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temp = sensor.temperature
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humidity = sensor.humidity
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#convert to Farenheit
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temp = (temp * 1.8) + 32
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#Round the decimals
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temp = round(temp, 2)
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#print("Temperature: {}*F Humidity: {}% ".format(temp, humidity))
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result = 1
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return temp, humidity
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except RuntimeError as error:
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print(error.args[0])
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time.sleep(2.0)
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def publish(client, temp, humidity):
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#Publish Temp Results
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tempMsg = '{{ "temperature": "{}" }}'.format(temp)
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#tempMsg = temp
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result = client.publish(tempTopic, tempMsg)
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status = result[0]
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if status == 0:
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#print(f"Send `{tempMsg}` to topic `{tempTopic}`")
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pass
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else:
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print(f"Failed to send message to topic {tempTopic}")
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#Publish Humid Results
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humidMsg = '{{ "humidity": "{}" }}'.format(humidity)
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result = client.publish(humidTopic, humidMsg)
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status = result[0]
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if status == 0:
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#print(f"Send `{humidMsg}` to topic `{humidTopic}`")
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pass
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else:
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print(f"Failed to send message to topic {humidTopic}")
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while True:
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#We first check if a libgpiod process is running. If yes, we kill it!
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for proc in psutil.process_iter():
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if proc.name() == 'libgpiod_pulsein' or proc.name() == 'libgpiod_pulsei':
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proc.kill()
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#D20 is the pin number, DHT11 is the sensor type
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sensor = adafruit_dht.DHT11(board.D20)
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#Run functions
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client = connect_mqtt() # Connect to Broker
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client.loop_start() #Start loop
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temp, humidity = getValues(sensor)
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getValues(sensor)
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publish(client, temp, humidity)
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time.sleep (300.0)
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client.loop_stop() #Stop loop
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client.disconnect() # Disconnect
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