@skywatch I've got some 10 µF and 100 µF electrolytic capacitors, and just received a bunch of other various capacitors, ranging from 1 to 470 µF. I haven't tested them for now. But good news ! I also received 3 NRF24L01+ with built in antennas, reset the entire crew of nodes and gateway, and it works like a charm I'm more than happy. Thanks again for all your advices. I'll post some news later, testing the capacitors with NRF24L01+ and antennas. Ciao.