What is max relay and switch (on/off) not button we can connect to esp8266 i try 4 but i have only 3 working and i can't find another that working afrer reboot. When i use some pins for on/off whitch ...

Command USB switch (f.ex. https://www.amazon.de/gp/product/B07WMG6LB7) using an ESP8266 NodeMCU. Switching is achieved by pulling down one of the pins on NodeMCU to ...