![import com.mbientlab.metawear.api.characteristic;
//< Setup callback for receiving device information
mwCtrllr.addDeviceCallback(new DeviceCallbacks() {
@Override
public void receivedGATTCharacteristic(GATTCharacteristic characteristic,
byte[] data) {
Log.i("ExampleActivity", String.format("%s= %s", characteristic.toString(),
new String(data));
}
@Override
public void receivedRemoteRSSI(int rssi) {
log.i("ExampleActivity", String.format("RSSI= %d dBm", rssi));
}
});
//< Read characteristics from the device information service
//< GATT characteristics are from the DeviceInformation enum
mwCtrllr.readDeviceInfo();
//< Read battery level from the battery service
//< GATT characteristics are from the Battery enum
mwCtrllr.readBatteryLevel();
//< Read RSSI value
mwCtrllr.readRemoteRSSI();
mwController.addModuleCallback(new MechanicalSwitch.Callbacks() {
@Override
public void pressed() {
if (saviours != null && saviours.getCount() > 0) {
Toast.makeText(getActivity(), "button pressed", Toast.LENGTH_SHORT).show();
sendText(true);
} else {
Toast.makeText(getActivity(), R.string.error_no_contact, Toast.LENGTH_SHORT).show();
}
}
})
Switch Callback](https://image.slidesharecdn.com/t3coverbio-150629172201-lva1-app6891/85/The-Software-Developers-Guide-to-Prototyping-Wearable-Devices-26-320.jpg)
The Software Developers Guide to Prototyping Wearable Devices
- 1. T3 Session 4/16/2015 11:00 AM "The Software Developers Guide to Prototyping Wearable Devices" Presented by: Lance Gleason Polyglot Programming Inc. Brought to you by: 340 Corporate Way, Suite 300, Orange Park, FL 32073 888-‐268-‐8770 ·∙ 904-‐278-‐0524 ·∙ sqeinfo@sqe.com ·∙ www.sqe.com
- 2. Lance Gleason Polyglot Programming Inc. Lance Gleason has been a computer nut ever since his dad bought him a computer when he was a kid. After getting a BS and MS in Computer Science, he worked on a number of large projects as a Java developer and architect for companies like Kodak, CNN, and GE. These days he is the CEO and founder of Polyglot Programming LLC. which focuses on Ruby, mobile and wearable software development. Lance regularly speaks about Ruby/wearable development at conferences around the world and is the co-organizer of the Atlanta Sensors and Startups Meetup, Ruby DCamp ZA, and Rubyfuza (the only Ruby conference in Africa). He is known to practice interspecies pair (purr) programming with his orange tabby, Allie, and when he’s not writing code, you will find him diving with sharks, trekking through Chernobyl, sampling wine, cheering on the Springboks or perfecting his biltong recipe. Follow Lance on Twitter @lgleasain.
- 11. Cons • Impossible to create a at scale prototype • Many extensions overkill for wearables
- 12. Pros • Inexpensive • Available GPS Module • Low Power • Aduino Based • Lots of Support Cons • No easy way to integrate Bluetooth or Wifi • Requires a physical connection to get data • Things like an accelerometer require a separate component
- 15. Features • Bluetooth Support • Robust API for Android and IOS • Built in Sensors (temperature, accelerometer etc.) • Built in support for rechargeable batteries Specs • ! Nordic Semiconductor nRF51822 BLE SoC • ! 2.4 GHz transceiver • ! ARM®Cortex™-M0 32 bit processor • ! 256 kB flash program memory • ! 16 kB RAM • ! 8/9/10 bit ADC
- 16. Specs Continued • Accelerometer • Temperature Sensor • Push Button Switch • Bright LED • Driver for vibration motor • micro usb chargable • I2C bus, and support for 4 digital/analog and 4 digital pins
- 17. Cons • Really Small • Tough to write custom drivers • Proprietary
- 18. Bluetooth • Same Frequency range as 2.4 Gigahertz Wifi • 79 Channels VS 13 • Less Throughput
- 19. Bluetooth LE • Always off • Less Throughput • Often lower transmit power • Designed for low data low power Applications
- 20. IOS • IPad 3rd Generation or better • Iphone 4S or greater
- 21. Android • Bluetooth 4.0 supported radio • Android 4.3 or greater
- 23. repositories { ivy { url "http://ivyrep.mbientlab.com" layout "gradle" } } compile 'com.mbientlab:metawear:1.5.3' Include the Repo <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <service android:name="com.mbientlab.metawear.api.MetaWearBleService" /> <!-- Other application info --> </application> Update The Manifest
- 24. package com.example.metawear; import com.mbientlab.metawear.api.MetaWearBleService; import android.app.Activity; import android.content.ServiceConnection; public class ExampleActivity extends Activity implements ServiceConnection { private MetaWearBleService mwService= null; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //< Bind the MetaWear service when the activity is created getApplicationContext().bindService(new Intent(this, MetaWearBleService.class), this, Context.BIND_AUTO_CREATE); } @Override public void onDestroy() { super.onDestroy(); //< Unbind the service when the activity is destroyed getApplicationContext().unbindService(this); } @Override public void onServiceConnected(ComponentName name, IBinder service) { //< Get a reference to the MetaWear service from the binder mwService= ((MetaWearBleService.LocalBinder) service).getService(); } //< Don't need this callback method but we must implement it @Override public void onServiceDisconnected(ComponentName name) { } } public class ExampleActivity extends Activity implements ServiceConnection { @Override protected void onResume() { super.onResume(); registerReceiver(MetaWearBleService.getMetaWearBroadcastReceiver(), MetaWearBleService.getMetaWearIntentFilter()); } @Override protected void onPause() { super.onPause(); unregisterReceiver(MetaWearBleService.getMetaWearBroadcastReceiver()); } } Nofifications via Activity
- 25. private final string MW_MAC_ADDRESS= "EC:2C:09:81:22:AC"; private MetaWearController mwCtrllr; public void onServiceConnected(ComponentName name, IBinder service) { mwService= ((MetaWearBleService.LocalBinder) service).getService(); final BluetoothManager btManager= (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE); final mwBoard= btManager.getAdapter().getRemoteDevice(MW_MAC_ADDRESS) mwCtrllr= mwService.getMetaWearController(mwBoard); } //< Connect to the board the object is controlling mwCtrllr.connect(); ///< Close the Bluetooth connection mwCtrllr.close(); Instantiate and Connect private DeviceCallbacks dCallbacks= new DeviceCallbacks() { @Override public void connected() { Log.i("ExampleActivity", "A Bluetooth LE connection has been established!"); } @Override public void disconnected() { Log.i("ExampleActivity", "Lost the Bluetooth LE connection!"); } }; ///< Register the callback, log message will appear when connected mwController.addDeviceCallback(dCallbacks); ///< Remove the callback, no feedback for when a ble connection is made mwController.removeDeviceCallback(dCallbacks); Registering Callbacks
- 26. import com.mbientlab.metawear.api.characteristic; //< Setup callback for receiving device information mwCtrllr.addDeviceCallback(new DeviceCallbacks() { @Override public void receivedGATTCharacteristic(GATTCharacteristic characteristic, byte[] data) { Log.i("ExampleActivity", String.format("%s= %s", characteristic.toString(), new String(data)); } @Override public void receivedRemoteRSSI(int rssi) { log.i("ExampleActivity", String.format("RSSI= %d dBm", rssi)); } }); //< Read characteristics from the device information service //< GATT characteristics are from the DeviceInformation enum mwCtrllr.readDeviceInfo(); //< Read battery level from the battery service //< GATT characteristics are from the Battery enum mwCtrllr.readBatteryLevel(); //< Read RSSI value mwCtrllr.readRemoteRSSI(); mwController.addModuleCallback(new MechanicalSwitch.Callbacks() { @Override public void pressed() { if (saviours != null && saviours.getCount() > 0) { Toast.makeText(getActivity(), "button pressed", Toast.LENGTH_SHORT).show(); sendText(true); } else { Toast.makeText(getActivity(), R.string.error_no_contact, Toast.LENGTH_SHORT).show(); } } }) Switch Callback
- 27. .addModuleCallback(new Accelerometer.Callbacks() { @Override public void shakeDetected(MovementData moveData) { shakeCounts.getAndIncrement(); if (!setTimerTask.get()) { resetTask= new TimerTask() { @Override public void run() { shakeCounts.set(0); setTimerTask.getAndSet(false); } }; timer.schedule(resetTask, RESET_DELAY); setTimerTask.getAndSet(true); } if (shakeCounts.get() == MAX_SHAKES) { resetTask.cancel(); setTimerTask.getAndSet(false); shakeCounts.getAndSet(0); if (saviours != null && saviours.getCount() > 0) { sendText(false); } else { Toast.makeText(getActivity(), R.string.error_no_contact, Toast.LENGTH_SHORT).show(); } } } }); Shake Callback
- 29. Example Code Available at https://github.com/lgleasain/Metawear-Android-SOS Twitter @lgleasain Github lgleasain www.lancegleason.com www.polyglotprogrammincinc.com lgleason@polyglotprogramminginc.com