NRF24L01 Transmission Problem

Yes I wll try to change the channels, I use the tmrh20 library and I haven't specify channel for the moment.
Reason:
Screenshot_3.png
See here:
http://tmrh20.github.io/RF24Network/classRF24Network.html

#include <RF24.h>
#include <RF24Network.h>

const uint16_t this_node = 031;

void setup()
{
  radio.begin();
  radio.setDataRate(RF24_250KBPS);
  network.begin(this_node);
}

Why ever not? Isn't it as simple as plugging out the nRF24s and plugging them in somewhere else?

Because it's solder on the PCB. ( Domotiser un appareil grâce à un relai V2 - La domotique DIY

Screenshot_3.png