To help anyone else facing the same problem, I bumped into this issue whilst trying to use up some ESP32 S2's on a project.
The reason is simply that there are some strapping pins that are defined in the manual, they are IO0, IO45 and IO46. These control how the ESP32 boots up.
IO45 controls the ...
Search found 2 matches
- Sat Jul 12, 2025 1:34 pm
- Forum: Hardware
- Topic: ESP32 S2 flashes but monitor shows invalid header: 0xffffff0f error
- Replies: 7
- Views: 31522
- Thu Nov 09, 2023 7:15 pm
- Forum: Hardware
- Topic: i2c clock speed reduction when failing to communicate to a slave
- Replies: 3
- Views: 4393
Re: i2c clock speed reduction when failing to communicate to a slave
I too have had this problem and I reported it at the Espressif Github page as a bug, issue 8480, see
https://github.com/espressif/arduino-esp32/issues/8480
I didn't find this page though, until earlier today. Like those on this forum, the problem has been identified as impacting ESP32-S2, but not ...
https://github.com/espressif/arduino-esp32/issues/8480
I didn't find this page though, until earlier today. Like those on this forum, the problem has been identified as impacting ESP32-S2, but not ...