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Continuous reading of heart rate now working

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This commit is contained in:
Graham Jones
2020-08-09 23:43:34 +01:00
parent dc5a43040b
commit 8b46e1b42d
1 changed files with 87 additions and 97 deletions
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172
app/src/main/java/uk/org/openseizuredetector/SdDataSourceBLE.java
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@@ -32,35 +32,25 @@ import android.bluetooth.BluetoothGattDescriptor;
import android.bluetooth.BluetoothGattService;
import android.bluetooth.BluetoothManager;
import android.bluetooth.BluetoothProfile;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.os.Binder;
import android.os.Handler;
import android.os.IBinder;
import android.preference.PreferenceManager;
import android.text.format.Time;
import android.util.Log;
import android.widget.Toast;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.jtransforms.fft.DoubleFFT_1D;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
import java.util.UUID;
/**
* A data source that registers for BLE GATT notifications from a device and
* waits to be notified of data being available. */
* waits to be notified of data being available.
*/
public class SdDataSourceBLE extends SdDataSource {
private String TAG = "SdDataSourceBLE";
private BluetoothManager mBluetoothManager;
@@ -84,9 +74,17 @@ public class SdDataSourceBLE extends SdDataSource {
public final static String EXTRA_DATA =
"com.example.bluetooth.le.EXTRA_DATA";
public final static UUID UUID_HEART_RATE_MEASUREMENT =
UUID.fromString(GattAttributes.HEART_RATE_MEASUREMENT);
public static String SERV_DEV_INFO = "0000180a-0000-1000-8000-00805f9b34fb";
public static String SERV_HEART_RATE = "0000180d-0000-1000-8000-00805f9b34fb";
public static String SERV_OSD = "xxxxxxxxxxxxxxxxxxxx";
public static String CHAR_HEART_RATE_MEASUREMENT = "00002a37-0000-1000-8000-00805f9b34fb";
public static String CHAR_MANUF_NAME = "00002a29-0000-1000-8000-00805f9b34fb";
public static String CLIENT_CHARACTERISTIC_CONFIG = "00002902-0000-1000-8000-00805f9b34fb";
public static String CHAR_OSD_ACC_DATA = "xxxxxxxxxxxxxxxxxx";
public final static UUID UUID_HEART_RATE_MEASUREMENT = UUID.fromString(CHAR_HEART_RATE_MEASUREMENT);
public SdDataSourceBLE(Context context, Handler handler,
@@ -115,7 +113,11 @@ public class SdDataSourceBLE extends SdDataSource {
}
Log.i(TAG, "mBLEDevice is " + mBleDeviceName + ", Addr=" + mBleDeviceAddr);
bleConnect();
}
private void bleConnect() {
// Now we have selected a BLE Device, open the bluetooth adapter and connect to it.
if (mBluetoothManager == null) {
mBluetoothManager = (BluetoothManager) mContext.getSystemService(Context.BLUETOOTH_SERVICE);
@@ -146,13 +148,7 @@ public class SdDataSourceBLE extends SdDataSource {
}
/**
* Stop the datasource from updating
*/
public void stop() {
Log.i(TAG, "stop()");
mUtil.writeToSysLogFile("SDDataSourceBLE.stop()");
private void bleDisconnect() {
if (mBluetoothAdapter == null || mBluetoothGatt == null) {
Log.w(TAG, "BluetoothAdapter not initialized");
return;
@@ -164,11 +160,18 @@ public class SdDataSourceBLE extends SdDataSource {
mBluetoothGatt.close();
mBluetoothGatt = null;
super.stop();
}
/**
* Stop the datasource from updating
*/
public void stop() {
Log.i(TAG, "stop()");
mUtil.writeToSysLogFile("SDDataSourceBLE.stop()");
bleDisconnect();
super.stop();
}
// Implements callback methods for GATT events that the app cares about. For example,
@@ -176,21 +179,19 @@ public class SdDataSourceBLE extends SdDataSource {
private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
String intentAction;
if (newState == BluetoothProfile.STATE_CONNECTED) {
intentAction = ACTION_GATT_CONNECTED;
mConnectionState = STATE_CONNECTED;
broadcastUpdate(intentAction);
mSdData.watchConnected = true;
Log.i(TAG, "Connected to GATT server.");
// Attempts to discover services after successful connection.
Log.i(TAG, "Attempting to start service discovery:" +
mBluetoothGatt.discoverServices());
Log.i(TAG, "Attempting to start service discovery:");
mBluetoothGatt.discoverServices();
} else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
intentAction = ACTION_GATT_DISCONNECTED;
mConnectionState = STATE_DISCONNECTED;
Log.i(TAG, "Disconnected from GATT server.");
broadcastUpdate(intentAction);
mSdData.watchConnected = false;
Log.i(TAG, "Disconnected from GATT server - retrying...");
bleDisconnect(); // Tidy up connections
bleConnect();
}
}
@@ -202,86 +203,73 @@ public class SdDataSourceBLE extends SdDataSource {
for (int i = 0; i < serviceList.size(); i++) {
String uuidStr = serviceList.get(i).getUuid().toString();
Log.v(TAG, "Service " + uuidStr);
if (!GattAttributes.lookup(uuidStr,"None").equals( "None")) {
Log.v(TAG,"Service Name="+GattAttributes.lookup(uuidStr,"None"));
List<BluetoothGattCharacteristic> gattCharacteristics =
serviceList.get(i).getCharacteristics();
if (uuidStr.equals(SERV_DEV_INFO)) {
Log.v(TAG, "Device Info Service Discovered");
} else if (uuidStr.equals(SERV_HEART_RATE)) {
Log.v(TAG, "Heart Rate Service Discovered");
for (BluetoothGattCharacteristic gattCharacteristic : gattCharacteristics) {
String charUuidStr = gattCharacteristic.getUuid().toString();
if (charUuidStr.equals(CHAR_HEART_RATE_MEASUREMENT)) {
Log.v(TAG, "Subscribing to Heart Rate Measurement Change Notifications");
setCharacteristicNotification(gattCharacteristic, true);
}
}
} else if (uuidStr.equals(SERV_OSD)) {
Log.v(TAG, "OpenSeizureDetector Service Discovered");
for (BluetoothGattCharacteristic gattCharacteristic : gattCharacteristics) {
String charUuidStr = gattCharacteristic.getUuid().toString();
if (charUuidStr.equals(CHAR_OSD_ACC_DATA)) {
Log.v(TAG, "Subscribing to Acceleration Data Change Notifications");
setCharacteristicNotification(gattCharacteristic,true);
}
}
}
}
broadcastUpdate(ACTION_GATT_SERVICES_DISCOVERED);
} else {
Log.w(TAG, "onServicesDiscovered received: " + status);
}
}
public void onDataReceived(BluetoothGattCharacteristic characteristic) {
// FIXME - collect data until we have enough to do analysis, then use onDataReceived to process it.
if (characteristic.getUuid().toString().equals(CHAR_HEART_RATE_MEASUREMENT)) {
int flag = characteristic.getProperties();
int format = -1;
if ((flag & 0x01) != 0) {
format = BluetoothGattCharacteristic.FORMAT_UINT16;
//Log.d(TAG, "Heart rate format UINT16.");
} else {
format = BluetoothGattCharacteristic.FORMAT_UINT8;
//Log.d(TAG, "Heart rate format UINT8.");
}
final int heartRate = characteristic.getIntValue(format, 1);
Log.d(TAG, String.format("Received heart rate: %d", heartRate));
}
if (characteristic.getUuid().toString().equals(CHAR_OSD_ACC_DATA)) {
Log.v(TAG,"Received OSD ACC DATA");
}
}
@Override
public void onCharacteristicRead(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic,
int status) {
Log.v(TAG,"onCharacteristicRead");
if (status == BluetoothGatt.GATT_SUCCESS) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
onDataReceived(characteristic);
}
}
@Override
public void onCharacteristicChanged(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
Log.v(TAG,"Characteristic "+characteristic.getUuid()+" changed");
onDataReceived(characteristic);
}
};
private void broadcastUpdate(final String action) {
final Intent intent = new Intent(action);
mContext.sendBroadcast(intent);
}
private void broadcastUpdate(final String action,
final BluetoothGattCharacteristic characteristic) {
final Intent intent = new Intent(action);
// This is special handling for the Heart Rate Measurement profile. Data parsing is
// carried out as per profile specifications:
// http://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml
if (UUID_HEART_RATE_MEASUREMENT.equals(characteristic.getUuid())) {
int flag = characteristic.getProperties();
int format = -1;
if ((flag & 0x01) != 0) {
format = BluetoothGattCharacteristic.FORMAT_UINT16;
Log.d(TAG, "Heart rate format UINT16.");
} else {
format = BluetoothGattCharacteristic.FORMAT_UINT8;
Log.d(TAG, "Heart rate format UINT8.");
}
final int heartRate = characteristic.getIntValue(format, 1);
Log.d(TAG, String.format("Received heart rate: %d", heartRate));
intent.putExtra(EXTRA_DATA, String.valueOf(heartRate));
} else {
// For all other profiles, writes the data formatted in HEX.
final byte[] data = characteristic.getValue();
if (data != null && data.length > 0) {
final StringBuilder stringBuilder = new StringBuilder(data.length);
for(byte byteChar : data)
stringBuilder.append(String.format("%02X ", byteChar));
intent.putExtra(EXTRA_DATA, new String(data) + "\n" + stringBuilder.toString());
}
}
mContext.sendBroadcast(intent);
}
/**
* Request a read on a given {@code BluetoothGattCharacteristic}. The read result is reported
* asynchronously through the {@code BluetoothGattCallback#onCharacteristicRead(android.bluetooth.BluetoothGatt, android.bluetooth.BluetoothGattCharacteristic, int)}
* callback.
*
* @param characteristic The characteristic to read from.
*/
public void readCharacteristic(BluetoothGattCharacteristic characteristic) {
if (mBluetoothAdapter == null || mBluetoothGatt == null) {
Log.w(TAG, "BluetoothAdapter not initialized");
return;
}
mBluetoothGatt.readCharacteristic(characteristic);
}
/**
* Enables or disables notification on a give characteristic.
@@ -295,10 +283,12 @@ public class SdDataSourceBLE extends SdDataSource {
Log.w(TAG, "BluetoothAdapter not initialized");
return;
}
Log.v(TAG,"setCharacteristicNotification - Requesting notifications");
mBluetoothGatt.setCharacteristicNotification(characteristic, enabled);
// This is specific to Heart Rate Measurement.
if (UUID_HEART_RATE_MEASUREMENT.equals(characteristic.getUuid())) {
Log.v(TAG,"setCharacteristicNotification - running extra code for heart rate");
BluetoothGattDescriptor descriptor = characteristic.getDescriptor(
UUID.fromString(GattAttributes.CLIENT_CHARACTERISTIC_CONFIG));
descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);