![]() One simple solution to try is manual reset described below, and if it does not help you can find more details about possible issues in Troubleshooting.Įsptool.py resets ESP32 automatically by asserting DTR and RTS control lines of the USB to serial converter chip, i.e., FTDI or CP210x (for more information, see Establish Serial Connection with ESP32). One of the reasons might be issues encountered by esptool.py, the utility that is called by the build system to reset the chip, interact with the ROM bootloader, and flash firmware. ![]() ![]() ![]() ![]() If you run the given command and see errors such as “Failed to connect”, there might be several reasons for this.
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