if you find a way to make it work, pls share the project

@Nca78 Yes, I was actually thinking using DIP switch (or even more easy to read thumbwheel switch) to give a unique ID to each node! As soon as I receive the extra radio modules I ordered, I'll test that. @Grubstake I'm afraid you're right! But it's ok to have just a few days of battery life. As I wrote, it might be often disassembled and reassembled.

Welcome to the MySensors community @garnser ! The getting started guide has good recommendations to get you started. The ir example lists which parts you'll need for ir communication. The motion detection example lists which parts you'll need to detect motion. I suggest you read the entire getting started guide, since it most likely will save you a lot of time. The forum has lots of extended discussion on both ir and motion, but I recommend that you start small and get the basic examples working before you extend. If anything is unclear, just ask away

@m26872 The link is helpful and I understand now. Thanks

@dias I want a code with 2 relays and 2 pir You got to get started coding then If you bump into problem you can ask questions here.