Yes, it is a board with usb connector and 5v to 3.3v regulator but I don't use the later. I have a external 3.3v regulator and I power the board directly with it. When I connect a usb to monitor the serial port, I send 5v at the same time than my external 3.3v power. Those ''meet'' each other on the...

Hi, From the spec I found for this board, each relay need 65mA @ 3V to work. The 3.3v pin of the ESP can't provide 4x65mA + some current for the logic pin triggerring. What you need to do is the following: 1- power the relay with a external 3.3v power supply. 2- limit the logic current provide by ea...

Hi. First post here. I power a ESP32 directly on the 3.3v pin. To avoid conflicting power (5v usb vs 3.3v PSU), I disconnect the 3.3v pin to flash the device and to monitor data on the serial monitor in the arduino IDE. Now I would like to monitor the data from my device while keeping the 3.3v pin c...