Yep, this keyboard is another ebay special. I can’t stay away! This is a SafeType™ V801 from probably the early 2000s, although there is no date on it anywhere. I’m basing my guess on the fact that ...
* arduino-cli compile --fqbn arduino:mbed_opta:opta examples/opta_opcua_server -v --build-property compiler.cpp.extra_flags="-DUSE_MODBUS_SENSOR_MD02=1" -u -p /dev ...