Port expanding HAT for the Raspberry Pi
Introduction By development of a new version of our heating control, I was dealing with several ideas like designing a new microcontroller pcb, using an ESPXY-device or the most luxurious solution using a Raspberry Pi board. All three solutions open three different grades of performance, effort and possibilities for further ideas. In the past I spend several months of playing with self designed AVR microcontroller boards. These boards are communicating and interacting through a self-constructed ISM1 network and I’m proudly able to say: “Since I have installed them, they had worked all the time.” ...