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The missing part of Espressif’s reset circuit

qsantos · published 2 July 2025

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How to use “real” UART Read at the source ↗

Arduino’s Automatic Reset Read at the source ↗

Linux always toggles DTR & RTS Read at the source ↗

Espressif’s Automatic Reset Read at the source ↗

Talking to Espressif’s Bootloader Read at the source ↗

The ESP32-S2 reset pin Read at the source ↗

Reproducing Espressif’s reset circuit Read at the source ↗

Transistors in reverse and redundant circuits Read at the source ↗

The serial TX path seems to be down Read at the source ↗

https://www.espressif.com/sites/default/files/documentation/ESP-Prog_V2.1_reference_design_r1.0.zip

espressif.com

https://dl.espressif.com/dl/schematics/ESP32-S2-SAOLA-1_V1.1_schematics.pdf

dl.espressif.com

https://www.espressif.com/sites/default/files/documentation/esp32-s2_datasheet_en.pdf

espressif.com

https://hydraraptor.blogspot.com/2021/08/esp32-auto-program-fix.html

hydraraptor.blogspot.com

https://github.com/espressif/esptool/issues/136

github.com

https://community.hiveeyes.org/t/power-supply-for-the-esp32/1859

community.hiveeyes.org

https://kazulog.fun/dev/esp32-auto-bootloader/

kazulog.fun

https://qsantos.fr/2025/07/06/overanalyzing-a-minor-quirk-of-espressifs-reset-circuit/

qsantos.fr