esp8266 wroom-02 mains switch and optoisolated input
@Jose_Luis_TurBoss Which module did you use - looks like a ESP8266 integrated with PSU and mains switch on the same board?
@John_Seymour
is a diy pcb here is the kicad project https://github.com/TurBoss/ESP-MAINS-SWITCH there is a input part and output no psu included