An Arduino Nano or a Micro might be the best options If a small board sounds like the most appropriate ... On the Nano, the SPI pins are on digital pins D10 to D13, and the I2C/TWI pins are on A4 ...

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 ...

Other features of the Maker Nano RP2040 small board which measures just 49.53mm x 21.08mm in size include support for the Arduino IDE, CircuitPython and MicroPython.