I think I wired properly (VCC to 5V - GND to GND and D1 for data). I was thinking if I toggle data wire I should see a change and the fan should start or stop. I was wrong? I loaded wled on xiao esp32 C3 and an usermode which activate multirelay. Put the D1 pin on the usermode and nothing… I tried a level shifter same behaviour - nothing. Any other advice …