I have added the C5 capacitor (on the "My Slim 2AA node"), and replaced the nrf24 from my GW with a NRF24L01+PA+LNA.
It's way better
So far, no problem .. I will keep you updated in the following days
Anyway, thanks for your help
What type of sensors are they? Do they act like simple "switches" or what kind of signal do they offer on the output?
For the door, I assume they are like reed switch (with magnet fixed on the door itself)
For the movement ... I don't know !