android-bluetooth

I am currently developing Android BLE, and encounters a lot of problems with the Android BLE stacks.. My development tool is Samsung Galaxy J with Android 4.3. I want to know how can I read a characteristics from the BLE and the write the characteristics (is like i verify what data I have received, and then I send another data using the BLE) and I have serious problem understanding how the Android BLE callbacks works, I dont understand these 5 functions...and the manual is not clear, can anyone good soul explain in simple form??? onCharacteristicWrite onCharacteristicRead

My goal: To detect all nearby bluetooth devices(phones, headsets etc.) from my Android application. Here's a nice example from developer.android.com which discovers the bluetooth devices nearby along with the list of already paired devices. My situation: I had two bluetooth headsets turned on and they were not being detected after a successful bluetooth scan! So I dig into the problem and somewhere found that the bluetooth headset needs to be switched to pairing mode in case of being detected by android. To switch the headsets in pairing mode, I had to long press the power button while turning

My app can be controlled by normal headset. It simply overrides "onKeyDown". But key events from bluetooth headset are not captured - why? Or how to capture bluetooth key events? the "log cat" shows the following if i press button on headset: Bluetooth AT recv(3043): AT+VGS=15 AudioPolicyManagerBase(13654): FM radio recording off AudioService(2261): sendVolumeUpdate, isKeyguardLocked...Not to update Volume Panel. VolumePanel(2261): change volume by MSG_VOLUME_CHANGED VolumePanel(2261): onVolumeChanged(streamType: 6, flags: 0) VolumePanel(2261): Call setChangeSeekbarColor(false) i also tried to

I've got a simple iOS app which displays the proximity of the Bluetooth LE beacons it detects using such expressions as "immediate", "near" etc. and I need to write something similar on Android. I've followed the tutorial at Android developer and I'm able to list detected devices and now want to estimate the distance/proximity - this is where it's become a problem. According to this SO thread it's just a handful of mathematical calculations. However, they require me to provide a txPower value. According to this tutorial by Dave Smith (and cross-referencing with this Bluetooth SIG statement ),

I've got a working app using CoreBluetooth to communicate between an iPad (central) and iPhone (peripheral). I have one service that has two characteristics. I have a Nexus 7 running the latest Android 4.3 with BTLE support. Android is a bit late to jump on the BTLE bandwagon but it appears they are approaching it similarly to how iOS did, where initially they only support acting as a central with the peripheral mode coming in a later version. I can load the sample Android BTLE app and browse for nearby peripherals. With my iPhone advertising as a peripheral I can see the value from

I have created a Bluetooth Activity class in the android app, which works fine for all the Bluetooth functionalities like: scanning, pairing, connecting, sending and receiving data. The real problem is when the Activity is destroyed. Bluetooth is disconnecting. how can I make Bluetooth connection throughout the app. and I want to send data to the Bluetooth from other activities. Help me to implement this in an easy way? public class BTActivity extends AppCompatActivity { ArrayList<BluetoothDevice> devices = new ArrayList<>(); BluetoothAdapter mBluetoothAdapter; BluetoothDevice mBluetoothDevice

I'm working on a BluetoothLE sensor device, for which I need to form a one-to-many broadcast of data. As per the spec, peripherals may only have a single master, and due to limitations of the chip and stack I'm designing on, a master can only have three slaves. From what I understand, Android cannot become a BLE slave anyway, so having my device as a master is not an option. Both the BT4 spec and manufacturer documentation talk about another mode of operation, referred to as Broadcast mode. In broadcast mode, a connection is never made, and the application data is transmitted as part of the