ESP32-C3 GPIO21
GPIO21 / U0TXD
Safe to use
- No boot, flash or radio conflicts known for this pin.
What GPIO21 can do
- Digital input/output
- PWM output (LEDC)
- UART (via GPIO matrix)
All ESP32-C3 pins
GPIO0 · GPIO1 · GPIO2 · GPIO3 · GPIO4 · GPIO5 · GPIO6 · GPIO7 · GPIO8 · GPIO9 · GPIO10 · GPIO18 · GPIO19 · GPIO20 · GPIO21
ESP32 Pinout Studio - free interactive pinout reference. Pin data generated from Espressif's official KiCad libraries. esp32pin.com