A fancy keyboard….. At last a clickety keyboard. A Razer Blackwidow V3 mechanical keyboard. I’m not a gamer, but i like the clickety sounds. RGB leds are always nice to play with.

One of the nice things about razer is the Linux support!

Some nice links:

https://github.com/openrazer/openrazer

https://openrazer.github.io/

Even several python scripts can be found, but no MQTT.
So made a fast ‘n simple hack to control my keyboard with mqtt/nodered.

When someone is at the frontdoor, my keyboard changes from white to red.

Below a node-red example

My python code:

import paho.mqtt.client as mqttClient
import time
import os
import subprocess
import json

def on_connect(client, userdata, flags, rc):
    if rc == 0:
        print("Connected to broker")
        global Connected
        Connected =True
    else:
        print("Connection failed")

def on_message(client, userdata, message):
    subprocess.Popen(["razer-cli", "-c", message.payload])

Connected = False

broker_address = "your.mqtt.brokerip.here"
port = 1883
#user = "user"
#password = "password"
client = mqttClient.Client("mqttrazer")
#client.username_pw_set(user, password=password)
client.on_connect = on_connect
client.on_message = on_message

client.connect(broker_address, port=port)
client.loop_start()

while Connected != True:
    time.sleep(0.1)

client.subscribe('razer/in')

try:
    while True:
        time.sleep(1)

except KeyboardInterrupt:
    print ("exiting")
    client.disconnect()
    client.loop_stop()