ELEKTOR UNO R4 board overtrumps Arduino Uno - Elektor (blog)

Elektor (blog)

ELEKTOR UNO R4 board overtrumps Arduino Uno Elektor (blog) The modified Wire and SPI libraries for the second I2C and SPI ports will allow you to use all familiar debugging options and assembler support in Atmel Studio 7 for the Arduino together with this new 328PB board. PWM on pin 2 requires special attention.