Thank you for your reply
I didn't find any 5V output of the esp32, I guess that you mean I could use the 3,3V output of esp32?
I did not link the GND of the esp32 with the arduino one, I tested it and nothing change.
I tested the apa102 led stripe with fastled on arduino and, I did not have that I wanted, but the led swith on, whereas that with esp32 and micropython_dotstar all led stay off...
I am sure that the problem is the interface between chair and keyboard, but I don't know where I missed