The Goal is to "MySeonsorize" Light-Switches in a existing building-circurit. Without change the Design and smallest effort as possible.

This Node is build based on a ATmega328p and a NRF24L01-SMD Module.

• works as local switch, also if the mysensors network not available
• including enclosure fits the european switch socket (60mm)
• no sound, lights are switched by a AQH SSD Relais (1.2 A max)
• the output is secured by a changeable fuse
• input is protected by a varistor
• reuse the most mechanical parts from original
• enclosure is 3d printable
• exposes FTDI and ISP Headers

This enclosure fits for GIRA System 55 switches. And can be adapted for other Vendors. The project is hosted on GitHub, feel free to contribute for other Vendor or Series.

Building:

• the PCB comes partly assebled from factory

• You have to solder the backside components

• print the enclosure

• Programm and test the Node

• disassemble the original switch

• combine the Parts

• assble the Node

• finished