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 I2C (inter-integrated circuit) protocols to exchange data with EEPROMs or sensors that are operating in slave ...

Jeff's been involved in the IT industry since before the Internet and spent more than 20 years working in technical support, system administration, network administration, and consulting roles. He ...

First, the new Pi 3 Model A+. This is a scaled-down and lower cost version of the Pi 3 Model B+. In the most important functional areas it is identical to the Pi3 B+: it has a 1.4GHz 64-bit quad-core ...