I am also experiencing this and I don't think it is limited to boot, it also seems to high during flashing (the entire time of the flash).
This is definitely a bit unsafe IMHO. I don't think this is fixed by the efuse either....
Are there known-safe GPIOs that stay low during boot and flash (and ...
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- by kev_rm
- Sun Jan 11, 2026 3:34 pm
- Forum: ESP32 Arduino
- Topic: ESP32-S3 GPIO 39~42 (JTAG) during early boot stages
- Replies: 4
- Views: 2781
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