Frequently Asked Questions
What should I watch out for on the ESP32-C3 SuperMini?
GPIO 2, 8 and 9 are strapping pins. GPIO 9 is the BOOT button; keep 8 HIGH at boot. GPIO 18/19 are native USB D-/D+. Using them breaks USB flashing and serial. ADC2 (GPIO 5) does not work reliably with Wi-Fi. Use GPIO 0-4 for analog. Enable "USB CDC On Boot" in Arduino IDE to see Serial output.
Is the ESP32-C3 SuperMini 5 V tolerant?
No. It uses 3.3 V logic. Putting 5 V on a GPIO pin can damage it; use a voltage divider or level shifter.
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