I think I found the problem. It was indeed a power supply issue. The LDO that I had the 3.3V pin hooked up to was dodgy, so it browned out when WiFi.begin() was called and there was a sudden demand for current. I hooked the circuit to a scope and discovered that. Funny everything was OK when the CP2...

I removed the UMH3N module from the board, which is providing signal for EN and IO0. No difference. I could read stuff from sensors, and write output by flashing LEDs. But the moment I call WiFi.begin(), the board resets. I am supplying 3.3V to the board via 18660 + HT7833 LDO. Everything works grea...

Could you please elaborate? What do you mean by the auto-reset circuit?

The reset button still works though..

I have been banging my head on this for a few days now, and need some fresh perspective on this problem. Basically, I am using a ESP32 D1 Mini dev board, and programming it using Arduino. I removed the CP2104 UART module using a hot air gun to see how much power I can save without it. After removing...