I2C expanders, or ADCs will give you plenty of pins for whatever project you have in mind. All these require extra components, though. Enter the ExtraCore library for Arduino, a software library ...

The I2C/TWI pins on the Micro are on D2 and D3. For Arduino beginners, these two boards are nearly interchangeable, especially when used in simple circuits like the Arduino's built-in examples.

The Arduino Nano and Raspberry Pi Pico have distinct ... MISO, and SCK), and one I2C/TWI (pins A4 and A5 as SDA and SCL). The Pico, however, doubles these numbers. It offers two UARTs: the first ...

An Arduino isn’t worth very much unless it can ... The ESP’s dedicated I2C pins are on GPIO 21 and 22 for data and clock respectively. Some I2C implementations will use the microcontroller ...