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by marttt666
Sat Aug 08, 2026 3:45 pm
Forum: General Discussion
Topic: ESP32-S3 GPIO0 stuck at 0.65V and enters download mode
Replies: 1
Views: 9

ESP32-S3 GPIO0 stuck at 0.65V and enters download mode

Hello,

My ESP32-S3 enters download mode on every boot:

rst:0x1 (POWERON),boot:0x22 (DOWNLOAD(USB/UART0))
waiting for download

GPIO0 measures about 0.65V with a multimeter, with nothing connected to the board.

Could a 0.65V reading indicate a damaged GPIO0 or leakage/short on the pin? What is the ...

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