The Arduino Nano itself is the most basic and oldest of the group, and just like its many iterations, ... and their A4 and A5 pins both double as SDA and SCL pins for I2C/TWI communication.

On the Nano, you can access one UART (pins D0 and D1 as RX and TX), one SPI (pins D10 to D13 as SS, MOSI, MISO, and SCK), and one I2C/TWI (pins A4 and A5 as SDA and SCL). The Pico, however ...

The power of Espressif’s ESP32-S3 meets Arduino’s unmatched customer experience, documentation and community — all in the compact form factor of the Nano. Provides support for both ...