While the Raspberry Pi has very good support for an I2C bus, a lot of very cool chips – including the in system programmer for just about every ATtiny and ATmega microcontroller – use an SPI bus.

This library is the combination of 2 legacy libraries that were developed by Mario Gomez and Ondřej Ondryáš. The pirc522 library by Ondřej Ondryáš contained a full package that can be easily installed ...

First of all: It is a good idea to use the pascalio Lib (https://github.com/SAmeis/pascalio) for the hardware components such as SPI, I2C and the GPIOs of the ...