Battery charging logic (operator)

[archerindigo]

While the battery is on the NFC reader of the charger box, the operator should update the battery level every second and send the level to the charger box and the electric box.

Once a fully charged battery is present on the charging platform of the electric box, the operator should resume the control room's power and enable next puzzle.

[archerindigo]

Current design for charging platform:

• Battery level from 0 to 100
• When a battery is placed on the charging platform, the battery level will increase by 10% every ~0.5s, until 100%
  • Battery level will be shown on the LCD
• When the battery is not detected, a default message will be shown ("Place the battery on the platform to charge!") instead of the battery level

For battery level indicator design, please refer to #34

[archerindigo]

MQTT update of battery level is also done in #44. No major update of the charging logic is expected for now.

Operator does not necessary to record the battery level. MQTT can retain the last battery level message.