ESP32 Forum

Hi, I want to ask about ESP32, especially about connecting ESP32 to WiFi.

I previously had no problem connecting ESP32 to WiFi or mobile hotspot, as long as the power source of ESP32 is obtained from USB. The problem is when the power source is not using USB, such as a power supply, ESP32 cannot connect to WiFi.

I have also tried using ESP8266, and the results are quite satisfactory. With or without using USB, ESP8266 can connect to WiFi. But a different thing happens with ESP32 as I explained earlier.

Has anyone experienced this before? If anyone knows something about this, please help me.

Are you sure the ESP32 boots up properly? You can try to press 'reset' to see if it works then. Also, what hardware (devboard, module, pcb, ...) are you using?

What ESP32 board are you using? It sounds like perhaps the power supply circuit, necessary for converting an outside voltage to 3.3v for the EPS32, has a problem.

The ESP32 uses 3.3v, not 5v. So, 'something' must be doing the voltage conversion. If this is a custom board, make sure you have the proper reset circuit. Look at the electrical specs. I have seen myself that if you don't use the reset circuit, the ESP32 will not power up correctly. What happens is solely based on the input voltage due to the slew rate of the power supply ramping up.