All Questions
Tagged with bluetooth-gatt bluez
31
questions
0
votes
1
answer
34
views
GATTTool fails to read characteristics/attribute for Heart Beat data
I'm trying to read the heart rate data from my Xiaomi Mi Band 8 using BlueZ's gatttool. The heart rate data is found in the characteristic with UUID 0x2a37, which has the property NOTIFY.
However, ...
- 3
2
votes
1
answer
92
views
Bluetooth Pairing via BlueZ in Just Work Mode Fails - Confirm Value Failed
Kernel: Linux 4.9.84 armv7l on board
Bluez: 5.65
Peer: Android 12 & IOS 16.6
Application:
Use btmgmt open bluetooth settings
btmgmt power off
btmgmt connectable on
btmgmt pairable on
btmgmt ...
- 29
-1
votes
2
answers
228
views
How to deal with BlueZ bluetooth instability? [closed]
Background
My team has been trying to implement a bluetooth LE 'api' for a while now. We decided on BLE over legacy Bluetooth due to iOS (one of our client device types) blocking legacy BT for anyone ...
- 368
0
votes
1
answer
676
views
Raspberry Pi Bluetooth: Enable legacy pairing / connection without PIN input
For a few days I'm desperately trying to configure Bluetooth legacy pairing on my Raspberry Pi. Unfortunately I hadn't had any success until today. I tried countless tutorials/posts on several forums ...
- 25
0
votes
1
answer
143
views
bluetoothctl creating gatt server - cant write more than one byte
I've added a service and charecteristic with bluetoothctl (bluez v5.64). I have some issues:
I can only write one byte. attempting write "0x11 0x22" results in
"Unable to write local ...
- 71
0
votes
1
answer
359
views
Linux BlueZ BLE GATT Service encryption + indications
I am setting up a BLE GATT Service using Bluez 5.65 in Linux. I have my own process that I compile together with BlueZ sources. In the makefiles I have added it as another tool. I base my new tool on ...
- 83
0
votes
0
answers
614
views
How to change the supervision timeout of BLE peripheral?
I have a pure C application running on a BLE peripheral that reproduces some of the bluez code.
In le_set_advertising_parameters_cp, I see min_interval and max_interval but I don't see any supervision ...
- 1,869
1
vote
4
answers
3k
views
Trying to understand BLE UUIDs and handles (with bluetoothctl example)
As far as I understand, in BLE, UUIDs are universal IDs that serve to uniquely identify a BLE attribute. They can be 2, 4 or 128 bytes. When they are 2 or 4, the remaining bits until 128 are filled ...
- 2,602
0
votes
1
answer
453
views
[Linux][Bluez][Bluetooth] Failed to re-connect after forgetting while using NoInputNoOutput with bluetooth agent
System is running below:
Bluez_version: 5.65
Linux Kernel version: 5.15.77-3
In this case let's call the system that's having the issue is called DUT
Steps to reproduce(Scenario):
Set the bluetooth ...
- 109
0
votes
1
answer
375
views
How to Automatically Re-Connect Bluetooth HID over GATT (HOG) Device when BlueZ Plugin "hog" is Disabled
Linux 5.10, BlueZ 5.55
I have a remote control which implements Bluetooth LE. If I use the default Bluetooth daemon, I am able to pair and trust using bluetoothctl. If the connection is lost after a ...
- 147
0
votes
1
answer
540
views
Python bluez dbus: Custom GATT server how to notify int16 Value changed
I'm building a custom BLE GATT Server with Python. I took the original bluez example server and added a Temperature (0x2a6e) characteristic.
From the documentation, it should be a single field '...
- 981
0
votes
0
answers
131
views
Best practice for designing GATT server service
How would you design a GATT server service that will be used for getting long-string information? What is the best practice for that? I saw some implementations used two characteristics one uses the ...
- 1
0
votes
0
answers
59
views
Detect bluetooth FW hang in bluez stack
I am trying to implement an application using bluez.
The issue is :
If sometimes the Bluetooth controller Firmware goes into bad state, my application hangs.
There is no way to recover, except through ...
- 161
1
vote
2
answers
279
views
How to specify AdressType in bluez device-api?
I'm trying to connect a LE device to my Linux laptop through a python script. Nevertheless, the device address must be specified as "random" for the connection to happen, and the examples ...
2
votes
1
answer
2k
views
Receiving ERR UNLIKELY when doing a Write With Response
I have written an application in C using Bluez that implements a peripheral (a GATT server). I managed to advertise and make my peripheral work. Reading a characteristic works fine, notifying works ...
