Homie Eingang

config.json

{
    "HOST": "x.x.x.x",
    "PORT": 1883,
    "KEEPALIVE": 10,
    "USERNAME": "",
    "PASSWORD": "",
    "CA_CERTS": "",
    "DEVICE_ID": "eingang",
    "DEVICE_NAME": "Eingang Lampe und Kamera",
    "TOPIC": "homie"
}

eingang.py

#!/usr/bin/env python

# install deps:
# apt-get install python-pip python-dev
# pip install wiringpi
#
import time
import homie
import logging
import wiringpi as wpi
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

PIN_SERVO = 18
PIN_LAMP = 23

wpi.wiringPiSetupGpio()
wpi.pinMode(PIN_LAMP, wpi.GPIO.OUTPUT)
wpi.pinMode(PIN_SERVO, wpi.GPIO.PWM_OUTPUT)
wpi.pwmSetMode(wpi.GPIO.PWM_MODE_MS)
wpi.pwmSetClock(192)
wpi.pwmSetRange(2000)

Homie = homie.Homie("config.json")
switchNode = Homie.Node("lampe", "ESH:Light")
servoNode = Homie.Node("kamera", "ESH:Temperature")

def angleHandler(mqttc, obj, msg):
    # in-range: 0-100 out-range: 70-270 (was 50-250)
    percent = int(msg.payload.decode("UTF-8"))
    angle = percent * 2 + 70
    if angle < 50 or angle > 270:
        logger.error("Invalid value: %s", angle)
        return
    logger.info("Servo: %s", angle)
    wpi.pwmWrite(PIN_SERVO, angle)
    Homie.setNodeProperty(servoNode, "percent", percent, True)

def switchOnHandler(mqttc, obj, msg):
    payload = msg.payload.decode("UTF-8").lower()
    if payload == 'true' or payload == 'on':
        logger.info("Switch: ON")
        wpi.digitalWrite(PIN_LAMP, 1)
        Homie.setNodeProperty(switchNode, "value", "true", True)
    else:
        logger.info("Switch: OFF")
        wpi.digitalWrite(PIN_LAMP, 0)
        Homie.setNodeProperty(switchNode, "value", "false", True)


def main():
    Homie.setFirmware("eingang", "1.1.0")
    Homie.subscribe(switchNode, "value", switchOnHandler)
    Homie.subscribe(servoNode, "value", angleHandler)
    
    Homie.setup()
    logger.info("Ready.")

    Homie.setNodeProperty(switchNode, "itemtype", "Switch")
    Homie.setNodeProperty(switchNode, "$type", "ESH:Light")
    Homie.setNodeProperty(servoNode, "itemtype", "Number")
    Homie.setNodeProperty(servoNode, "$type", "ESH:Temperature")
    Homie.setNodeProperty(servoNode, "min", "0")
    Homie.setNodeProperty(servoNode, "max", "100")

    while True:
        time.sleep(1)

if __name__ == '__main__':
    try:
        main()
    except (KeyboardInterrupt, SystemExit):
        logger.info("Quitting.")