This looks really good :) Does it work with Vera only or can Domoticz work?

@olaeke Oh sorry I didnt see that you replied! I mean Can I use a cable from a cat5 cable?

Edit: Used a piece of cat5 wire and it works great!

I must also thank you for your 433node sketch and .h file. It is working so well with 3x Nexa 433mhz switches (150 sek for 3 switches) :)

Edit 2: The 433 transmitter should not be powered by usb - > arduino - > 433 transmitter. I had a very low rate of success until i powered it with a wallplug.

@Dan-S. Thanks for your investigation! I made the changes and it seems to work well!

About the high pitch sound I mentioned earlier; I changed NEO_KHZ400.

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, NEO_PIN, NEO_GRB + NEO_KHZ400);

to

NEO_KHZ800

This removed the annoying high pitch sound :D