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Arduino Nano ESP32 pinout

Every Arduino Nano ESP32 pin with its capabilities (digital, PWM, ADC, I2C, SPI, UART) and the wiring gotchas that bite. The Nano form factor with an ESP32-S3 inside: WiFi, Bluetooth LE and tons of flash. 3.3 V logic — NOT 5 V tolerant.

ESP32-S3 @ 240 MHz, WiFi + BLELogic: 3.3 VPro in app

Arduino Nano ESP32 pinout diagram

3.3 V logic despite the Nano footprint; B0/B1 are boot-mode pins. Download SVG

Pin	Capabilities	Watch out
D0 (RX)	DigitalUART RX
D1 (TX)	DigitalUART TX
D2	DigitalInterrupt
D3	DigitalPWM
D4	DigitalPWM
D5	DigitalPWM
D6	DigitalPWM
D7	DigitalPWM
D8	DigitalPWM
D9	DigitalPWM
D10	DigitalSPI CS
D11	DigitalSPI MOSI
D12	DigitalSPI MISO
D13	DigitalSPI SCK
A0	Analog inDigital
A1	Analog inDigital
A2	Analog inDigital
A3	Analog inDigital
A4 (SDA)	DigitalI2C SDA
A5 (SCL)	DigitalI2C SCL
A6	Analog inDigital
A7	Analog inDigital
3V3	Power out 3.3V
VBUS	Power 5V from USB
VIN	Power in 6–21V
GND	Ground

Arduino Nano ESP32 gotchas & notes

3.3 V logic: never feed 5 V into a GPIO. Use a level shifter for 5 V sensors.
Arduino pin names (D0–D13, A0–A7) map onto ESP32-S3 GPIOs — the IDE handles the mapping.
Native USB; supports both Arduino and MicroPython.
Power: 5 V via VBUS/USB, or 6–21 V on VIN.

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