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Questions tagged [bluetooth-gatt]

The Generic Attribute Profile (GATT) defines the way that two Bluetooth Low Energy (BTLE) devices transfer data back and forth using concepts called Services and Characteristics.

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Which correct flag of autoConnect in connectGatt of BLE?

My goal is to make an auto connection between Bluetooth Low Energy device and phone. I followed the sample code and I found the line // We want to directly connect to the device, so we are setting the autoConnect parameter to false. mBluetoothGatt =…
Jame
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Android 10 BLE connection issue

I am working on an app that is connected to the BLE device using BluetoothGatt. I am successfully able to scan and connect with BLE devices in all devices like Samsung, Pixel, etc. I followed Android official BLE connection guide for scanning and…
Sanjay Kakadiya
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Android BLE Gatt connection change statuses

I have an android app to connect to a BLE device and write to it. I can successfully connect, read and write to it. As a part of testing, we are trying different disconnection scenarios. Sometimes, if BLE device disconnects the connection, I get the…
Ijas Ahamed N
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Is there a list with Bluetooth GATT Services and their description?

I'm looking for a list of Bluetooth GATT Services with a short description of each. I'm developing a BLE Android App and have to choose the best service.
lila
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Bluetooth Appearance Icons

I'm working on firmware for a BLE device and need to define an appearance value. For now, I have chosen a 'Generic Computer'. However, the full list of appearance values…
user3439702
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Battery Level of Bluetooth devices using Java

I am trying build a simple java program which shows battery status of connected Bluetooth devices in windows. see bellow sample image. First I started with BlueCove and realized BlueCove only provides basic information such as address, simple name…
Akila
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How to fix GattStatus: 3 - WriteNotPermitted exception for BLE Xamarin forms application?

I am working on a BLE application. I am able to connect to MI band and get the services through my Xamarin forms BLE app. But when I am trying to write characteristics I am getting exception. I'm getting exception Characteristic does not support…
Judson Abraham
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ios CoreBluetooth connectionEventDidOccur not being called

I have a peripheral device which supports A2DP profile and gatt over BR/EDR. Various gatt services are registered in the sdp record for bluetooth classic. I have developed an Android app to communicate with it successfully as follows : //here scan…
Tiger Wang
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BluetoothGattCallback returns 129 -> GATT_INTERNAL_ERROR for a Beacon, but returns 0 for phones

I call on my bluetooth adapter mBluetoothAdapter.startDiscovery(); which then returns me a list of BluetoothDevices. When I press on 1 of those devices, I do this: mBluetoothGatt = bluetoothDevice.connectGatt(MainActivity.this, false,…
rosu alin
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Trying to create a Gatt Client application for Windows C++ that doesn't fail when connection established

I am using the Windows api Gatt Client BLE for C++, my goal is to connect two devices (but in this case I will try just one) and keep reading and writing data constantly without closing the device at any time. All my devices have one specific…
María Román
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ESP32 acting as BLE server, cannot pair cyclocomputer

I'm trying to create a cycling power service on the ESP32 using PlatformIO and the NimBLE-Arduino library. Connecting, bonding, subscribing to the notifications and receiving the power data all work when the client is the nRF Connect Android app,…
gsoros
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How do you build a BLE app when you don't have access to the official GATT XML files?

To build a BLE app, you need service UUID the service's characteristic UUIDs the characteristic's permissions (read / write / notify ...) If you are sending any data, you need to know the value type (uint8_t, uint16_t ...) For an instance, if it…
kukrt
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Web-Bluetooth error "GATT operation not authorized" occurs on Windows only

I have been working with web-bluetooth for the past several months on iOS and ChromeOS without any problems. But today, I tried to run some of my examples on Windows for the first time, and to my surprise, most of the things I had implemented didn't…
Albert
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bluez and service/characteristics cache issue with Android

I have some trouble to communicate through BLE between an Android mobile application and a custom embedded device. The embedded device is peripheral and used a custom GATT profile define with Bluez. Everything is working fine. The problem is that…
ArthurLambert
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Documentation for Fluoride bluetooth stack

I'm working on BLE using Fluoride stack which is open-source. Is there any documentation or any notes that would help me to understand the architecture of Fluoride stack? Any help regarding this would be appreciated.
Pavan Hr
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