One example is the widespread adoption of Arduino Opta, a secure, easy-to-use micro PLC with Industrial IoT capabilities, which launched in February and is already used by hundreds of U.S. customers.

He didn’t make up a wiring diagram, but in the code comments [Steve’s] laid out the connections as follows: Arduino 8 to GBA SO Arduino 9 to GBA SI Arduino 10 to GBA SD Arduino 11 to GBA SC ...