@kimot No, it is an obvious mistake, I am very sorry. Maybe it is becouse the code in master branch is very old, the newest is not yet on github, but the developement branch is quite new. I am going to fix this soon.
Thank you both for your answers.
With so many parameters to play with, it was not easy to understand what was wrong.. But I think I finally got a way do get my hardware working
Here are my findings :
I thought I got RFM73 version of NRF24-like radios. They look like like here and here.
After checking and connecting all VCC and GND together, switch radios and arduinos... I got them suddenly working with Mysensors development librairies, then back to silence without apparent reason...
Indeed like @mark_venn suggested, I went back to stable librairies and try so set a static ID. Worked well... until it went back to silence again !
Then, following @mfalkvidd advice, I realised that flashing the eeprom_clear sketch solved my all my problems !
My summary :
Ensure that your 3.3V power supply is strong enough.
Ensure that your arduino, radios and sensors are sharing the same GND and VCC.
Use development librairies from github
Flash eeprom_clear before flashing your mysensor sketches
Then gatewaySerial and relayActuator should be able to communicate "out of box", mean you'll monitor some lines like this on the gateway serial : 0;255;3;0;9;read: 0-0-0 s=255,c=3,t=15,pt=0,l=2,sg=0:
Thanks again for your help, now I can start to play
Thank you so much, scalz.
That solved my problem.
Just soldered them and now it works.
It really seems the arduino needs a good wired connection in order to work.
Hi @chey, no, with the pro minis and MySensors lib I couldn't get less.
Didn't measure with yet another multimeter though...
My battery sensors are working now for about a year and the battery levels are between 65% and 70%.
The sensor furthest from the gateway is at 65% and the 3 others at 70%.
Not bad I think.
https://forum.mysensors.org/topic/11499/checking-mechanical-locked-doors-by-a-battery-based-windows-door-sensor-node