The Raspberry Pi Pico board's pinout tells us that there are 2 x SPI, 2 x I2C and 2 x UART. These all work fine as far as my tests have confirmed. Please could we get the pins_arduino.h file updated ...

Marlin is a mix of Arduino pin definitions (pins_arduino.h) and newer PlatformIO pin definitions (fastio.h, fastio_1280.h). This causes problems when some functions expect Arduino pins but are fed PIO ...

There are easy ways of getting more I/O pins for any project; shift registers, I2C expanders, or ADCs will give you plenty of pins for whatever project you have in mind. All these require extra ...

Arduino is very helpful for people who have little knowledge of programming or electronics. The user does not need to understand the hardware or the low level coding of the AVR controller. Arduino is ...