V3S 在使用蓝牙命令连接的时候，报错。
rfcomm bind /dev/rfcomm0 E0:A6:70:8C:A3:02 Can't open RFCOMM control socket: Protocol not supported 离线
找到原因了，是因为在内核配置的时候，没有选中相关的协议。
--- Bluetooth subsystem support │ │
│ │ [*] Bluetooth Classic (BR/EDR) features │ │
│ │ <*> RFCOMM protocol support │ │
│ │ [*] RFCOMM TTY support │ │
│ │ <*> BNEP protocol support │ │
│ │ [*] Multicast filter support │ │
│ │ [*] Protocol filter support │ │
│ │ <*> HIDP protocol support │ │
│ │ [*] Bluetooth High Speed (HS) features │ │
│ │ [*] Bluetooth Low Energy (LE) features │ │
│ │ [ ] Enable LED triggers │ │
│ │ [ ] Bluetooth self testing support │ │
│ │ [*] Export Bluetooth internals in debugfs │ │
│ │ Bluetooth device drivers ---> 离线
绑定之后能连上发数据吗？
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