mqtt color temp scale from blue for -15 C° to red for 40 C° via green

mqttTempColorScale.py

# -*- coding: utf-8 -*-

import mosquitto

def on_connect(client, userdata, rc):
        client.subscribe("vw/temp/1")

def on_message(client, userdata, msg):
        rgb = colorWheel(scaleTempToColor(float(msg.payload)))
        client.publish("vw/neo/color", ','.join(str(x) for x in rgb))

def scaleTempToColor(temp):
        # (-15|170) und (40|0)
        return temp * -34 / 11 + 1360 / 11

def colorWheel(wheelPos):
        wheelPos = 255 - int(round(wheelPos));
        if(wheelPos < 85):
                return [255 - wheelPos * 3, 0, wheelPos *3]
        if(wheelPos < 170):
                wheelPos -= 85
                return [0, wheelPos * 3, 255 - wheelPos * 3]
        wheelPos -= 170
        return [wheelPos * 3, 255 - wheelPos * 3, 0]

client = mosquitto.Mosquitto()
client.on_connect = on_connect
client.on_message = on_message

client.connect("mqtt", 1883, 60)

client.loop_forever()