- turn off:
- station is on longer than 1 hour
- if transformer temperature is > 50°C. Transformer external temp max: 40°C
- station is not handled for 5 minutes. Handling events:
- turning knob
- pressing knob
- toggling sleep/remove signals
- watchdog triggered
- instant when remove signal
- after 0...1-minute when sleep signal
- Soldering temperature
- Sleep time