nrf52840 Battery Service电池服务搭建步骤

1. 1. 1. UUID:  180F
      2. Characteristics
         1. Name:  Battery Level
            1. UUID:  2A19
            2. Type:  uint8
            3. Properties:  Read, Notify
            4. Permissions
               1. Read:  None required
            5. Description

The battery level of the device, expressed as an integer percentage from 0 to 100设备的电池电量，表示为0到100的整数百分比

2.battery level 定义到