The fan has been working normally so far as the only actuator through an 8-channel relay module, and I want to add a 12V peristaltic pump, but my ESP32 does not want to upload the code at all. The relay has a separate 5V power supply. Where am I making a mistake? Thank you.
I have moved your topic to a more appropriate category as you posted in a category that specifically says not to post there. I see you have been warned about selecting an appropriate category before so this time I have given you a 2 day rest from the forum. Please take the time to familiarise yourself with the forum rules.
Show the errors received during your attempts to upload the code... in a code block for best reading. Also, show your full sketch and a drawing of your project wiring.
