表 2. The relation of BLE distance and signal strength.
BLE 距离与信号强度关系
| 手表的距离/m | RSSI/dBm | 数据同步情况 |
| 1 | – 46 | 正常更新 |
| 3 | – 57 | 正常更新 |
| 5 | – 72 | 更新有卡顿 |
| 7 | –108 | 更新卡顿严重 |
| 10 | --- | 断开连接 |
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