v0.2.0

Highlights

• 3-Step Config Flow — Discovery, confirmation, and connection test displaying HW version, FW version, and serial number during setup
• Persistent BLE connection with automatic reconnect (replaces connect-per-poll)
• Auto device model detection from BLE manufacturer data (C4 Air, NP2 Air, LP2 Air, K4, 608PD, …)

Features

• Binary sensors for battery inserted (plug) and slot error (problem) per slot
• Beep switch to toggle the charger alarm tone on/off
• New sensors: Internal Resistance (mOhm), RSSI (dBm), Last Seen (timestamp), Energy Charged (Wh)
• Live charge timer — "Charging Since" as timestamp sensor with real-time frontend updates
• Slot status "empty" distinguishes between an empty slot and a slot with an idle battery
• Options flow for configurable poll interval (10–300s, default: 10s)
• Internationalization via translations/en.json with translation_key + has_entity_name

Improvements

• One-time hardware/firmware info fetch via AF02 characteristic after connect
• Slot sensors as sub-devices with via_device pointing to the main charger
• BLE packet parsing extracted into dedicated parser.py module
• Shared device info helpers in helpers.py (DRY)
• async_create_background_task() for proper lifecycle management
• capacity_done / energy_done changed from TOTAL_INCREASING to MEASUREMENT
• Switch fix: async_set_alarm_tone() as public API on the coordinator

Documentation

• README with sensor tables, setup guide, and BLE protocol description
• Screenshots: Config Flow, Device Overview, Slot Detail