The main concern was to find a good combination of price, power and availability. The market is filled with cheap with IoT chips and single board computers.
Raspberry Pi Zero W
The hardware for my product had to be affordable. For the CPU I originally started the prototyping using a Raspberry Pi zero W the Wi-Fi version. My first PCB was based on this board. I used 90-degree SMD dual pin headers to connect the raspberry pi to the PCB. I went with SMD pin headers so I could keep the other side of the PCB clean and flush for the LCD-s.



Continue reading