Jannis
3fc25c083b
The BMS only allows one simultaneous BLE connection. Keeping a persistent connection blocked the mobile app from connecting at all. Changes: - BmsBluetoothHandler: replace connect()/disconnect()/request() public API with a single poll() method that owns the full connect→read→disconnect lifecycle. Connection is held only for the duration of one data fetch. - Coordinator: gutted connection-state management — _async_update_data now just calls handler.poll() and processes results. No reconnect loop needed. - Poll interval defaults: 15s default, 10s min, 300s max. The BLE connect overhead (~2s) makes sub-10s intervals impractical. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
30 lines
1.1 KiB
Python
30 lines
1.1 KiB
Python
"""Constants for the Xiaoxiang Smart BMS integration."""
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DOMAIN = "xiaoxiang_bms"
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CONF_ADDRESS = "address"
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CONF_POLL_INTERVAL = "poll_interval"
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DEFAULT_POLL_INTERVAL = 15 # seconds — each poll does a full BLE connect/disconnect
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MIN_POLL_INTERVAL = 10 # below this the BMS has no breathing room between polls
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MAX_POLL_INTERVAL = 300
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# GATT UUIDs (Xiaoxiang BMS UART-over-GATT)
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UART_SERVICE_UUID = "0000ff00-0000-1000-8000-00805f9b34fb"
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RX_CHAR_UUID = "0000ff01-0000-1000-8000-00805f9b34fb" # BMS → HA (notify)
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TX_CHAR_UUID = "0000ff02-0000-1000-8000-00805f9b34fb" # HA → BMS (write)
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# Request frames: [0xDD, 0xA5, CMD, 0x00, CHK_HI, CHK_LO, 0x77]
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CMD_GENERAL = bytes([0xDD, 0xA5, 0x03, 0x00, 0xFF, 0xFD, 0x77]) # pack info
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CMD_CELL = bytes([0xDD, 0xA5, 0x04, 0x00, 0xFF, 0xFC, 0x77]) # cell voltages
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CMD_VERSION = bytes([0xDD, 0xA5, 0x05, 0x00, 0xFF, 0xFB, 0x77]) # hardware version string
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# Frame markers
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FRAME_START = 0xDD
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FRAME_END = 0x77
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# Response command IDs (byte 1 of frame)
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CMD_ID_GENERAL = 0x03
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CMD_ID_CELL = 0x04
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CMD_ID_VERSION = 0x05
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