Questions tagged [bluetooth]

Bluetooth is a global open wireless technology standard for exchanging data over short distances (using short wavelength radio transmissions) from fixed and mobile devices, creating personal area networks (PANs) with high levels of security.

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How to build an iOS app that can communicate with each other?

I am building a POS system that required to use iPads. Cashier will use 1 iPad to make order, and customer on the other side would have another iPad showing the order and amount. The problem is we ...
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How to notify GATT characteristic to send new sensor value to GATT client (custom BLE service)

I'm trying to notify a GATT characteristic where an external BLE GATT client has registered to (pure BLE / no mobile device lib). I can successfully register for notify with my external GATT client (...
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Splitting input and output (microphone and speakers)

As far as I understand it, today I have two Bluetooth profiles to choose from, for mobile applications: Speaker Profile or Hands Free Profile. What I would like to do, it have my application remote ...
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How do I send data from a python app to my laptop on the click of a button [on hold]

So basically I have a GUI on my phone developed with Kivy, and I want to be able to send data, based on the input from my GUI to, my laptop over Bluetooth or via a usb. So firstly I want to adjust ...
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regarding Raspberry pi 3 b+ Bluetooth host dowan

Most of the time I am getting problem while Bluetooth communication between Raspberrypi3 b+ inbuilt Bluetooth with hC05, it showing host down, then again I have to rerun the program until is connect. ...
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Can't perform any operations over object in javascript

I have two functions as given below. getRawData() and getBTRawData() getBTRawData() just gets the data from Bluetooth from a phone getRawData() gets the return value from getBTRawData() and tries ...
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Expect script - expecting 2 conditions and extracting a MAC add from bluetoothctl

I'm working off a raspberry pi zero w with bluetooth on board. Currently I can use bluetoothctl to manually do what I want but I'm trying to automate this so the rpi can be left alone to do this task ...
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Need my app to connect with my device BLE

I working with CC2640 and my custom APP. I have a problem that I haven't been able to solve for a couple of days. In practice, I do not risk connecting my BLE device to the APP when I use the paired. ...
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Send Data from device running Flutter to Arduino

I'm making a Flutter app that communicates with an Arduino via bluetooth to switch a relay. I have seen the two available packages for this (flutter_bluetooth_serial 0.0.5 and flutter_blue 0.5.0) and ...
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Arduino, receive byte array via bluetooth from Xamarin

I created Xamarin Android app to connect via bluetooth with arduino and modula HC-06. It works fine, but now I want to send data to arduino. I'm sending string from Android using: byte[] buffer = ...
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ELM327 Bluetooth communication issue

I made an Android app to communicate with an ELM327 OBD-II dongle via bluetooth. When I test the app with a bluetooth serial terminal (CoolTerm / macOS) the app is receiving and sending data without ...
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Bluetooth start discovery not giving results

This is my first app in Android. I am very new to Android and Java. I am kind of expert in iOS/ObjC though. I am learning by doing. So I jumped straight into making an app to connect to a bluetooth ...
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arrayAdapter does not shows available bluetooth device in ListView?

Android newbie here. I followed this video closely for it's part one and two. This video teach me how to make an apps that can scan nearby Bluetooth device and shows them and I personally thinks that ...
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Android Application get killed after screen locked for some time

I am developing an android application involving recording data in bytes into file in phone storage from an external device that is connected via bluetooth.I need the application to continuosly run ...
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Ellysis Bluetooth Sniffing Apple Airpods

I'm trying to determine how Apple Airpods pair and connect as seamlessly as they do, but I couldn't find any in-depth technical explanation so I embarked on a journey to figure it out for myself. I ...
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Printing a logo in android studio from bluetooth MTP-3 printer

I am trying to print my customers logo in Bluetooth POS printer MTP-3 If any one can do this please help me to write this code..
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Switching audio to speaker doesn't stay

When I have my airpods connected, switching audio to speaker doesn't stay.This code works in all states except when airpods are connected. var err: Error? = nil let session = AVAudioSession....
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how to integrate socket mobile scanner with android app and retrieve results

I need to integrate socket mobile Bluetooth scanner on my android app.. i tried there SDK they prescribed in their site https://docs.socketmobile.com/capture/java/en/latest/getting-started.html but ...
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pyBluez - how to stop bluetooth socket accept() call?

i use python and pyBluez lib to build a bluetooth server, code as below: import bluetooth socket = bluetooth.BluetoothSocket(bluetooth.RFCOMM) socket.bind(("", bluetooth.PORT_ANY)) socket.listen(1) ...
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why when I run my VirtualBox, my Bluetooth connection with headphones broke up?

when I run the VirtualBox (even without running virtual machines) connection with my headphones broke up. I looked at configurations of VirtualBox but didn't find any important settings referring to ...
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2 way Socket communication over bluetooth

Is there any way to make communication with 2 RBI over bluetooth using python Socket? Do you have some tips how I can do it? Should I use multithreading? Right now I'm using this lib -> https://...
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Unable to Initialize Bluetooth adapter inside Broadcast receiver

In my application inside broadcast adapter at bluetooth on event, I am getting pair devices List and then checking every Device's name separately if any device contain specific sub String then try to ...
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Check Bluetooth Connection Status on Python3, Windows 10

I've gone through python bluetooth - check connection status and multiple other posts, but they seem dedicated to anything other than Windows. How would I be able to check if a Bluetooth device on ...
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Android: How to test a Bluetooth/BTLE implementation without a peer device

I have a rather complex and messy AndroidBluetoothAdapter application that supports communicating with SPP, HDP, and BTLE health devices. Testing it is a nightmare as I can only do it with real ...
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Bluetooth connection - Bluetooth Profiles and Bluetooth Classes

I have an application that changes the messages between 2 devices on Bluetooth. The application work on 2 mobile phones devices, but it crashes on another device. This another device is a device form ...
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Bluetooth service to run on multiple activities

What kind of service is required when implementing a bluetooth service over multiple activites while exchanging data between two devices? When I switch between activities connection is lost. Research ...
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1answer
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Mock a bluetooth device

I have to mock a bluetooth device that would first pair with an Android device and then send predefined data to an Android app. I have no access to source code of the app, but I managed to get ...
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Will BT 4.2 in Classic Mode connect to BT 2.1+EDR?

I am having a BT dual mode EVK which can operate in BT 4.2 LE and Classic as well. I want to check if this module would connect/ be compatible with my BT access point which is of BT 2.1+EDR. Thank ...
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Arc Semantic Issue: No visible @interface for 'CSRGaia' declares the selector 'getUserEQ:'

I'm working on a react-native project that requires some native modules. One of them is a Bluetooth module that allows me to access some CSRGaia methods. Ultimately, I want to be able to read the eq ...
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Bluetooth Low Energy paired vs unpaired communication

As I understand it, Bluetooth Low Energy communication can be established with or without pairing. This is in the context of mobile development, Android more specifically but I believe iOS is more or ...
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Capture media events (play/pause/previous/next) from bluetooth source possible?

I have a bluetooth speaker connected to my Windows tablet. I plan on creating a NodeJS application, which can listen for events coming from the speaker, such as play/pause, previous, next, and so on. ...
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How to track devices enabled with GPS/Bluetooth without internet and cellular network?

I have a problem statement where i am trying to build a system which can keep track of devices connected to it. The connection be through GPS or Bluetooth. Could you please let me know if there is a ...
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Android bluetooth sends data swapped when writing after long pause

My app is sending some data via bluetooth socket using Serial Port Profile, and the other device is Microchip's BM78 module. Everything is working fine except one very particular case when testing ...
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Connecting Raspberry Pi to Unity via Bluetooth

I want to connect my Raspberry Pi to unity via Bluetooth (I am writing an app that in the future will use the phone to connect to the Pi via Bluetooth). How do I do that ? I was not able to find the ...
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Android - Detect if other users of my app are nearby

I'm working on an Android app that needs to detect if other users of the app are close to each other (lets say within the same room or Bluetooth range). The app needs to be able to detect this without ...
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HSP and HFP profiles for hands-free telephony

I am attempting to implement hands-free telephony on my board, I successfully connected my android phone to the board via bluetooth module in phone and media audio sharing mode. The chip i use is ...
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iOS app development for a classic bluetooth device

We are developing an android and ios mobile app for a hardware device. We have to read files generated from the device and move it to mobile app. The device is not a low energy device. It's a ...
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How to open application using paired bluetooth device's data in broadcast Receiver

My application is use obd scanner(which is provide bluetooth interface) for get car data. I want to add one feature in this application which is app should be open itself whenever car's obd(already ...
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Changing pixel count of LED strip via Bluetooth

I have a working mobile app that can control the color of a ws2801 RGB LED stip remotely using Bluetooth. The app will send text to a Raspberry Pi and a python script will read and apply the changes. ...
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Android bluetooth reconnect fails

I am connecting to a HC05 bluetooth module and communicating with an arduino, and that is working pretty well. But I have encountered a problem. Sometimes it is impossible to connect to the ...
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1answer
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Check if bluetooth adapter is connected to a wearable device

I'm developing an android app and I need to know when Bluetooth is connected with a wearable device. I tried to use a method with a Bluetooth adapter, but without good results. How can I program this ...
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How to show an alert when turn off bluetooth in Swift app?

The question could be duplicated, but I have tried a lot of code and it wasn't work. I have read about CBCentralManagerOptionShowPowerAlertKey option and the possibility to show an alert to go ...
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How to use UART services on BLE Android app?

I am designing an app that connects to micro:bit via Bluetooth LE and transmits some information. I have handled the connection between The app and the micro:bit, but I cannot send information. When I ...
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Send string to Arduino via bluetooth

I'm trying to develop an app in Xamarin which sends simple strings to a HC-06 on my Arduino. Since cross-platform only offers Bluetooth Low-Energy, I only want to create an Android app in the first ...
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How do the 4.x/5.x Linux kernel and udev expose button-press events on Bluetooth headsets?

I have a Plantronics M70 Bluetooth headset that, like most headsets, includes a "feature" button. When connected to a smartphone, this is usually used to initiate a call. I want to use it to ...
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python bluetooth inquiry script doesn't work on Ubuntu

I have a Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode) plugged in a usb port of a Lenovo Ideapad 100 (laptop doesn't provide integrated Bluetooth service) . I dual boot Windows 7 and Ubuntu ...
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Unable to maintain BLE connection - BlueZ Linux <-> iOS

Setup: I'm running BlueZ 5.48 on an embedded Linux platform, with the Python example-gatt-server as a peripheral. I enable advertising with hciconfig hci0 leadv 0. I am trying to connect using nRF ...
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Banana PI M2+ Android 7.0: BLE work but doesn’t complete the pairing

I installed on BPI M2+ an Android 7 Nougat, as the operating system. I tried to use Bluetooth and this works correctly as I was also able to send photos from an Android phone. So far everything is ...
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facing diffculties while running real time graph in android

I'm new to android world. I'm trying to make an Android application to plot a real time graph using the values obtained by an Arduino sent via Bluetooth using the HC-06 module using MPAndroid Chart ...
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How to obtain the data of the Bluetooth device currently connected?

What is the most effective way to obtain the data (name, address mac etc) of the bluetooth device, currently linked? I have reviewed all BluetoothAdapter methods, and I do not find any that return ...

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