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.

Happy Pi Day! Isn't Pi Day one of the best holidays all year? For last year's Pi Day, I determined a value of pi without even using a circle. How can you top that? I can top it by using pi to find pi.

A key question for any IoT system is how fast can it operate? In this context we need a rough idea how fast GPIO Zero can toggle GPIO lines. Notice that this question depends not just on GPIO Zero, ...

More often than not, an IoT master device uses the SPI (serial peripheral interface) and I2C (inter-integrated circuit) protocols to exchange data with EEPROMs or sensors that are operating in slave ...