In the Netherlands we have so called KlikAanKlikUit light switches, it usses one way communication on 433,92 MHz.
I use it with a Raspberry PI, a tranceiver and the Domoticz App.
Can I use these light switches with Cayenne?
These switches are easy to buy and nicely prised.
Rob
Hi @uwdroomonzeklus,
Seems there is an Arduino library, so the easiest may be to use an Arduino to bridge them to Cayenne.
Looks like you could also use a RasPi Python client, GitHub - kvanhoorn/klikaanklikuit: python client for KlikAanKlikUit and check out the Cayenne MQTT Python lib GitHub - myDevicesIoT/Cayenne-MQTT-Python: Python Library for Cayenne MQTT API
You can also do it with C or other tools like Mosquito on the RasPi. @adam is our expert here 
Cheers,
Craig
Let me know if you need any help with he MQTT
There are various switches the latest are self-learning. Feel free to take a look at an earlier project of mine “Home Automation with self-learning 433 power switches” including DST and sunset and sunrise.