Hello @sundberg84, I already considered this idea but my node have been running perfectly for two days before failed. So I think, power consideration are not the problem. I can trigg on and off my shutters many and many times without problem.

@flylowgofast great! Thanks for reporting back :)

thanks to all your contributions, it becomes clear for me.

Hello Anticimex, It's a very good news ! I already produce the software to communicate between 4 nodes. But It seems to be simple to change for MySensors. I think it will be better for the futur. I will earn lot of time. Thank you for your informations