All Questions
Tagged with bluetooth-lowenergy gatt
474
questions
0
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1
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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
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20
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BlueNRG2 Primary Services increase
I am using BLUENRG-2 (STEVAL-IDB008V1M) and I have created new 4 custom primary services but only 3 are visible at a time. Is there any way to increase its count?
I tried initialising all 4 services ...
- 11
1
vote
1
answer
232
views
Example BLE GATT Server using C++
I'm trying to create BLE GATT services on my Raspberry Pi 4 using C++. Have searched for a while but wasn't able to find useful hints/examples.
More details:
I'm able to create GATT services and ...
- 13
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28
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Android bluetooth GATT connection limit per OS
I have observed 7 simultaneous connections max on the Google Pixel6 Pro. I have observed at least 8 simultaneous connections on the S23 (I have only 8 devices that utilize GATT).
I would like to ...
- 1,061
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52
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File transfer to Android/iOS device with BLE/NFC but no custom app
I have a scenario where I need a user with a generic mobile device (no custom apps installed) to be able to retrieve a PDF off of a BLE- and NFC-enabled device (nRF5340) running Zephyr RTOS, in an ...
- 4,330
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76
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How to configure AOSP for a Bluetooth Chip without BLE Support (e.g., CC2564) on Android 8.0?"
I'm currently working on integrating a Bluetooth chip, specifically the CC2564, into an Android Open Source Project (AOSP) environment running Android 8.0. The Bluetooth stack I'm utilizing is ...
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2
answers
57
views
Why do we get ERROR_GATT_WRITE_REQUEST_BUSY error while writing to characteristic if i enable notifications like in the below code?
object CHatServer{
private fun setupGattService(): BluetoothGattService {
//......
val rrepCharacteristic = BluetoothGattCharacteristic(
RREP_UUID,
...
- 21
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20
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Add BLE descriptors using mbed os
I’m wondering how I could get my characteristic discriptor display as in the picuture.
I have tried to set up the Gatt Characteristic as code below
Discription(
0x2A29, // attribute type
...
- 91
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0
answers
155
views
Reading and writing vendor-specific BLE characteristic values
I have tried several tools to programmatically read and write BLE characteristic values. I am having difficulty with all that I have tried.
I used the Python bleak libary on a Raspberry Pi 4B running ...
- 103
0
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106
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Throughput for GATT read, write, and notify
All BLE devices use GATT
in which device #1 basically reads and writes device #2's "characteristics".
Additionally, #2 can notify #1 regarding a characteristic change.
On this GATT stack, I ...
- 297
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72
views
How do I make a GATT server's read characteristic editable?
Im working on making a GATT server that can be connected to by a client application, that will eventually send data to said client. the way I understand it, is that the only value the client can see ...
- 1
1
vote
0
answers
36
views
Simultaneous BLE GATT Client & Server issue on when client initiates disconnect
I am working on the app for a dedicated device running Android.
The app starts GATT Server with a custom service and characteristics in order to provide communication between current device and ...
- 1,597
0
votes
1
answer
148
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BLE Cycle Trainer Write Characteristic UUID 2AD9 - How to adjust resistance based on what's happening in game?
Hello overflow friends,
I'd be eternally grateful if one of the resident BLE geniuses on this forum wouldn't mind helping me. I've been trying to build a little cycling game in c# and so far I've ...
0
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0
answers
265
views
Python Bleak write_gatt_char fails after Bleak update
My Python/Bleak/BleakClient code calls write_gatt_char with my custom UUID and a string of bytes.
This works fine with Bleak version 0.19.0 but fails with version 0.21.1 with the error message: "...
- 71
1
vote
0
answers
247
views
C#, BLE, BT5.0 - GetGattServicesAsync hangs forever. Why and is this a known issue?
I had to implement a bluetooth low energy interface in an older Software for the communication with Bluetooth devices. It's a WPF application targeting .NET Framework 4.8. To access the Windows....
- 11