@mfalkvidd you'r right, i was in a hurry , so i forgoted using my brain!!
the update was with domoticz and i have to check this way.
Thank.

Thank you both of you,
i done a mix :
i setup a watchdog using istransportready and i added a capacitor to the NRF24 (i know i had to but i haden't done it yet, so now it's done).
for now, it seems working, i'll post a feedback in few days.
Bye,
Eric.

Ok! I did not know.
I was doing a try on my node and turned off my gateway.
tomorrow i will do it again and with the gateway!
i'll will send you a feedback.
Thank you so much for your answers and your availability,

Eric,

Hi,
it works perfectly, you were so right from the beginning.
I took a wrong way because of the compilation success without loop() and setup() function in my sketch.
Anyway, my project works fine and thank you again.

@eric007 I think I found by myself: using events to manage my installation.