m1gin 144

gatttool -b 8C:CE:FD:56:B2:85 -I

[8C:CE:FD:56:B2:85][LE]> connect

Attempting to connect to 8C:CE:FD:56:B2:85
Connection successful

list services:


attr handle: 0x0001, end grp handle: 0x0004 uuid: 00001801-0000-1000-8000-00805f9b34fb
attr handle: 0x0005, end grp handle: 0x000d uuid: 00001800-0000-1000-8000-00805f9b34fb

list characteristics:


handle: 0x0002, char properties: 0x20, char value handle: 0x0003, uuid: 00002a05-0000-1000-8000-00805f9b34fb
handle: 0x0006, char properties: 0x02, char value handle: 0x0007, uuid: 00002a00-0000-1000-8000-00805f9b34fb

read uuid and get handle and value:

[8C:CE:FD:56:B2:85][LE]> char-read-uuid 00000001-0000-1000-8000-00805f9b34fb

handle: 0x0031 value: 01

read value by handle:

[8C:CE:FD:56:B2:85][LE]> char-read-hnd 0x0031

Characteristic value/descriptor: 01

send characteristic value (request):

char-write-req 0x0016 0000

Characteristic value was written successfully

send characteristic value (no response):



bluetooth info 8C:CE:FD:56:B2:85

Device 8C:CE:FD:56:B2:85 (public)
Name: Redmi Smart Band 2 B285
Alias: Redmi Smart Band 2 B285
Appearance: 0x00c2
Paired: yes
Bonded: yes
Trusted: no
Blocked: no
Connected: yes
LegacyPairing: no
UUID: SDP (00000001-0000-1000-8000-00805f9b34fb)
UUID: Generic Access Profile (00001800-0000-1000-8000-00805f9b34fb)
UUID: Generic Attribute Profile (00001801-0000-1000-8000-00805f9b34fb)
UUID: Human Interface Device (00001812-0000-1000-8000-00805f9b34fb)
UUID: Xiaomi Inc. (0000fdab-0000-1000-8000-00805f9b34fb)
UUID: Xiaomi Inc. (0000fe95-0000-1000-8000-00805f9b34fb)
ServiceData Key: 0000fe95-0000-1000-8000-00805f9b34fb
ServiceData Value:
10 59 82 2a 00 85 b2 56 fd ce 8c .Y.*...V...
ServiceData Key: 0000fdab-0000-1000-8000-00805f9b34fb
ServiceData Value:
01 01 ..

bluetoothctl pair 8C:CE:FD:56:B2:85

Attempting to pair with 8C:CE:FD:56:B2:85
[CHG] Device 8C:CE:FD:56:B2:85 Connected: yes
[CHG] Device 8C:CE:FD:56:B2:85 Bonded: yes
[CHG] Device 8C:CE:FD:56:B2:85 UUIDs: 00000001-0000-1000-8000-00805f9b34fb
[CHG] Device 8C:CE:FD:56:B2:85 UUIDs: 0000fe95-0000-1000-8000-00805f9b34fb
[CHG] Device 8C:CE:FD:56:B2:85 ServicesResolved: yes
[CHG] Device 8C:CE:FD:56:B2:85 Paired: yes
[NEW] Primary Service (Handle 0x0000)
Generic Attribute Profile
[NEW] Characteristic (Handle 0x0000)
Service Changed
[NEW] Descriptor (Handle 0x0000)
Client Characteristic Configuration
[NEW] Primary Service (Handle 0x0000)
Xiaomi Inc.
Pairing successful
[CHG] Device 8C:CE:FD:56:B2:85 Appearance: 0x00c2

useful tools:

  • nRF Connect (Android)
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