Mi Band 3配对和获取数据（心率，步数等）问题

Question

Tried pairing Mi Band with GATT services and characteristics, no response from band. Issue same for both android and iOS. Only works with Mi Fit official app.

Neither updating nor notifying the updates for any of the characteristics except battery,Date, other info.

Note:- Tried services/characteristics -

• FF0F
• 2A37
• 2A39
• 0000180d-0000–1000–8000–00805f9b34fb
• 0000fee0–0000–1000–8000–00805f9b34fb
• 0000009–0000–1000–8000–00805f9b34fb

Answer 1

You will need to authenticate the app before start fetch data. The steps are:

1. Enable notification for auth characteristics "0009
2. Send 18 bytes to the auth characteristics
3. Once notified {0x10, 0x01, 0x01}, write another request that sends the first two bytes in (2)
4. Once notified {0x10, 0x02, 0x01}, write another request that sends bytes with AES encrypted
5. One notified {0x10, 0x03, 0x01}, you can proceed with other actions like fetching data.

There are several tutorials available like this one .