I’ve been working on a high-voltage project using the Arduino Nano ESP32, but unfortunately, I didn’t take proper safety precautions. As a result, the board seems to be bricked. When I connect the board to my PC, it’s not recognized (doesn’t show up in Device Manager). Two LEDs near the USB-C connector turn on: one green and one orange. Pressing the RST button has no effect.
Troubleshooting Steps I’ve Tried:
Resetting the board by bridging the B1 and GND pins also the RST and GND pins, by doing so the LED near the RST button turns green, but nothing happens.
Also checked different USB cables and ports to rule out connection issues.
Is there anything else I can do to check if the damage is reversible? Could the ESP32 chip itself be damaged, and is there a way to confirm that?
Resetting the board by bridging the B1 and GND pins also the RST and GND pins, by doing so the LED near the RST button turns green, but nothing happens.
Hello @djidjibidji, sorry to hear this. Unfortunately if that fails, there's little else to try.
The RGB LED turns green because the B1 line is actually the green signal for the LED, so nothing "smart" is involved.
LEDs turning on at all also means 3V3 is present, so the power supply is reasonably OK.
The steps you mention cause the CPU to enter the ROM bootloader at startup and identify via USB, if connected; no additional components are involved.
If you are sure you did the sequence properly (short B1+GND, press and release the reset button, remove B1+GND short) and it still is not recognized by the PC, the CPU most probably went to ${happier_place}.
. Thank you for your answer.