Blue Tooth Low Energy Scanner for Android written in scala

android-scala-ble

Blue Tooth Low Energy Scanner for Android written in scala

Overview

This project serves to wrap up some common functionality regarding scanning for a BLE sensor device.
Right now the code is simple and to the point. Install a filter (device name, mac address) and then start scanning for devices.

Features

I will try to keep adding to this list as I go. For now here is a short list of features:

• Scan for a BLE sensor devices
  • Filter device list
• Callback function to report device and signal strength

Example Usage

class MainActivity extends Activity with BleDeviceScanner{
  // Notice the "with BleDeviceScenner"
  // ...

  @Override
    protected override def onCreate(savedInstanceState: Bundle) = {
      // ... normal android init
      initBleScanner(this)

      val bscan = findViewById( R.id.bscan ).asInstanceOf[Button]
        bscan.setOnClickListener(new View.OnClickListener {
          override def onClick(v: View) = {         
             val filter = {
                d: BluetoothDevice =>
                    d.getName() != null     // You could filter by device name or address here..                                    
              }
              startScanWithFilter(filter){
                di: BleDeviceInfo =>  // This ia a callback with the located device 
                  Log.d(TAG,"Found device[%s] with signal stregth: %s".format(di.getBluetoothDevice.getAddress, di.getRssi) )
              }             
          }
        })

    }

}

Example Projects

Was used in a hackathon to try to do accurate indoor positioning. We ended up having to make a ton of modifications since the TI Sensor Tag can not be used to accuratly interpolate position.

Here is a screen shot TODO://