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.

More often than not, an IoT master device uses the SPI (serial peripheral interface) and I 2 C (inter-integrated circuit) protocols to exchange data with EEPROMs or sensors that are operating in slave ...

The Raspberry Pi craze is a little over five years old, and it shows no sign of stopping. What began as a stripped-down, uber-cheap, credit-card sized PC meant to teach programming to children has ...