ESP8266 Community Forum

schufti wrote:that sounds like bad wiring (ground routing) and decoupling of the motor circuit.

That's very probable. Taking into account my huge knowledge of electronics, my wiring could be incorrect. Where can I find necessary information about wirings?

maybe you post a photo from your installation and we try to work out strategic points/measures.

schufti wrote:maybe you post a photo from your installation and we try to work out strategic points/measures.

Sir, I'd be very grateful!
Look, here is the schema that I have.

(The image's http address is https://drive.google.com/file/d/1EVlmei ... sp=sharing)

You have Vcc and Gnd reversed on the connections for the transistor of the optocoupler and R1. Hopefully that is just an error in the schematic.