ESP8266 GPIO2

GPIO2 / U1TXD / I2SO_WS

Use with care - Fine for many uses, but check the warnings below first.

What GPIO2 can do

Digital input/output
PWM output (software)
UART (fixed IO MUX pins)
i2s

Warnings for GPIO2

Strapping pin

Sampled at boot to set boot mode / configuration. Avoid driving it at reset unless you know the required level.

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All ESP8266 pins

GPIO0 · GPIO1 · GPIO2 · GPIO3 · GPIO4 · GPIO5 · GPIO6 · GPIO7 · GPIO8 · GPIO9 · GPIO10 · GPIO11 · GPIO12 · GPIO13 · GPIO14 · GPIO15 · GPIO16 · A0

ESP32 Pinout Studio - free interactive pinout reference. Pin data generated from KiCad's own stock symbol and footprint libraries (Espressif publishes no ESP8266 KiCad data). esp32pin.com