bluetooth – Page 7 – Tarik Billa

Get MAC address of bluetooth low energy peripheral in iOS

April 17, 2023 by Tarik

CBPeripheral’s identifier property will serve your purpose, available from a still-unconnected device in CBCentralManager’s didDiscoverPeripheral delegate method: – (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI CBPeripheral *peripheral … NSUUID* serverId = [peripheral identifier]; I have a half dozen LE devices I’m experimenting with, including multiple sets of identical devices. I just confirmed that across … Read more

Difference between close() and disconnect()?

April 15, 2023 by Tarik

With disconnect() you can later call connect() and continue with that cycle. Once you call close() you are done. If you want to connect again you will have to call connectGatt() on the BluetoothDevice again; close() will release any resources held by BluetoothGatt.

Where is the bluetooth/bluetooth.h located in Linux?

April 15, 2023 by Tarik

You need to install libbluetooth-dev package for compiling your code sudo apt-get install libbluetooth-dev That should install the bluetooth header files.

Bluetooth in react-native

April 12, 2023 by Tarik

Update (with disclaimer): Since I gave the original answer, things have changed. In my company (Polidea) since we realised there is no very good library for React Native for BT we developed and fully open-sourced (permissive licence) our own solution. It’s based on two RX-based Android and iOS native libraries and we wrote a common … Read more

Bluetooth sniffer – preferably mac osx

April 11, 2023 by Tarik

Apple publishes an application called PacketLogger. You can download it by going to https://developer.apple.com/download/more/?=for%20Xcode (or if you have Xcode installed, go to Xcode > Open Developer Tool > More developer tools), then loging in with your Apple developer account, search for Additional Tools and download the latest version (or if you have Xcode installed, download … Read more

Programmatically connect to paired Bluetooth device

April 9, 2023 by Tarik

Okay, since this was driving me crazy, I did some digging into the source code and I’ve found a 100% reliable (at least on my Nexus 4, Android 4.3) solution to connect to a paired A2DP device (such as a headset or Bluetooth audio device). I’ve published a fully working sample project (easily built with … Read more

Setting Notifications on Characteristic results in Invalid Handle error

April 6, 2023 by Tarik

I recently run into the same problem. The only solution I found was to restart the bluetooth (turn bluetooth off and turn it back on). In my case, it was a change in the bluetooth device (restarting it in DFU mode) that always caused this problem, so I ended up showing an alert to the … Read more

Multiple bluetooth connection

April 2, 2023 by Tarik

I was searching a way to connect 4 devices with bluetooth and I found the following. http://groups.google.com/group/android-developers/browse_thread/thread/69d7810f6ef9bb7d I’m not sure that this is what you want. But in order to connect more than 2 devices using bluetooth you have to create a different UUID for each device you want to connect. Follow the link to … Read more

How to write to a file in .NET Core?

March 28, 2023 by Tarik

This code is the skeleton I was looking for when I posed the question. It uses only facilities available in .NET Core. var watcher = new BluetoothLEAdvertisementWatcher(); var logPath = System.IO.Path.GetTempFileName(); var logFile = System.IO.File.Create(logPath); var logWriter = new System.IO.StreamWriter(logFile); logWriter.WriteLine(“Log message”); logWriter.Dispose();

Transfer data between iOS and Android via Bluetooth?

March 13, 2023 by Tarik

This question has been asked many times on this site and the definitive answer is: NO, you can’t connect an Android phone to an iPhone over Bluetooth, and YES Apple has restrictions that prevent this. Some possible alternatives: Bonjour over WiFi, as you mentioned. However, I couldn’t find a comprehensive tutorial for it. Some internet … Read more