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Added writing of alarmState to OSD BLE Characteristic - not properly tested yet because I don't have a BLE data source which reads this - but it handles the characteristic not existing properly without crashing.

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This commit is contained in:
Graham Jones
2024-01-28 20:28:14 +00:00
parent 6cdc245149
commit 7071696d8d
2 changed files with 52 additions and 13 deletions
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61
app/src/main/java/uk/org/openseizuredetector/SdDataSourceBLE.java
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@@ -104,10 +104,10 @@ public class SdDataSourceBLE extends SdDataSource {
public static String CHAR_OSD_WATCH_FW = "000085e9-0004-1000-8000-00805f9b34fb";
public static String CHAR_OSD_ACC_FMT = "000085e9-0005-1000-8000-00805f9b34fb";
// Valid values are 0: 8 bit vector magnitude scaled so 1g=44
public final static int ACC_FMT_8BIT = 0;
public final static int ACC_FMT_16BIT = 1;
public final static int ACC_FMT_3D = 3;
public static String CHAR_OSD_STATUS = "000085e9-0006-1000-8000-00805f9b34fb";
public static String SERV_INFINITIME_MOTION = "00030000-78fc-48fe-8e23-433b3a1942d0";
public static String CHAR_INFINITIME_ACC_DATA = "00030002-78fc-48fe-8e23-433b3a1942d0";
@@ -119,6 +119,7 @@ public class SdDataSourceBLE extends SdDataSource {
// public static String CLIENT_CHARACTERISTIC_CONFIG = "00002902-0000-1000-8000-00805f9b34fb";
private BluetoothGatt mGatt;
private BluetoothGattCharacteristic mOsdChar;
private BluetoothGattCharacteristic mStatusChar;
public SdDataSourceBLE(Context context, Handler handler,
@@ -289,22 +290,25 @@ public class SdDataSourceBLE extends SdDataSource {
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");
Log.i(TAG, "Subscribing to Acceleration Data Change Notifications");
mOsdChar = gattCharacteristic;
setCharacteristicNotification(gattCharacteristic, true);
} else if (charUuidStr.equals(CHAR_OSD_STATUS)) {
Log.i(TAG, "Found OSD Status Characteristic");
mStatusChar = gattCharacteristic;
} else if (charUuidStr.equals(CHAR_OSD_BATT_DATA)) {
Log.v(TAG, "Subscribing to battery change Notifications");
Log.i(TAG, "Subscribing to battery change Notifications");
executeReadCharacteristic(gattCharacteristic);
setCharacteristicNotification(gattCharacteristic, true);
executeReadCharacteristic(gattCharacteristic);
} else if (charUuidStr.equals(CHAR_OSD_WATCH_ID)) {
Log.v(TAG, "Reading Watch ID");
Log.i(TAG, "Reading Watch ID");
executeReadCharacteristic(gattCharacteristic);
} else if (charUuidStr.equals(CHAR_OSD_WATCH_FW)) {
Log.v(TAG, "Reading Watch Firmware Version");
Log.i(TAG, "Reading Watch Firmware Version");
executeReadCharacteristic(gattCharacteristic);
} else if (charUuidStr.equals(CHAR_OSD_ACC_FMT)) {
Log.v(TAG, "Reading Acceleration format code");
Log.i(TAG, "Reading Acceleration format code");
executeReadCharacteristic(gattCharacteristic);
}
}
@@ -314,7 +318,7 @@ public class SdDataSourceBLE extends SdDataSource {
for (BluetoothGattCharacteristic gattCharacteristic : gattCharacteristics) {
String charUuidStr = gattCharacteristic.getUuid().toString();
if (charUuidStr.equals(CHAR_INFINITIME_ACC_DATA)) {
Log.v(TAG, "Subscribing to Infinitime Acceleration Data Change Notifications");
Log.i(TAG, "Subscribing to Infinitime Acceleration Data Change Notifications");
mOsdChar = gattCharacteristic;
mAccFmt = ACC_FMT_3D; // Infinitime presents x, y, z data
setCharacteristicNotification(gattCharacteristic, true);
@@ -324,11 +328,11 @@ public class SdDataSourceBLE extends SdDataSource {
Log.v(TAG, "Battery Data Service Service Discovered");
for (BluetoothGattCharacteristic gattCharacteristic : gattCharacteristics) {
String charUuidStr = gattCharacteristic.getUuid().toString();
Log.v(TAG, "batt char=" + charUuidStr);
Log.i(TAG, "batt char=" + charUuidStr);
if (charUuidStr.equals(CHAR_BATT_DATA)) {
Log.v(TAG, "Subscribing to Battery Data Change Notifications");
Log.i(TAG, "Subscribing to Battery Data Change Notifications");
setCharacteristicNotification(gattCharacteristic, true);
Log.v(TAG, "Reading battery level");
Log.i(TAG, "Reading battery level");
executeReadCharacteristic(gattCharacteristic);
}
}
@@ -337,7 +341,7 @@ public class SdDataSourceBLE extends SdDataSource {
if (foundOsdService) {
mGatt = gatt;
} else {
Log.v(TAG, "device is not offering the OSD Gatt Service - re-trying connection");
Log.i(TAG, "device is not offering the OSD Gatt Service - re-trying connection");
bleDisconnect();
// Wait 1 second to give the server chance to shutdown, then re-start it
mHandler.postDelayed(new Runnable() {
@@ -374,6 +378,32 @@ public class SdDataSourceBLE extends SdDataSource {
}
}
/**
* executeWriteCharacteristic runs the bluetoothGatt writeCharacteristic command to sent the value
* of a given characteristic.
* Because only one BLE operation can be taking place at a time, it may fail, in which case
* the read is re-tried after a 100ms delay.
* @param gattCharacteristic - the characteristic to be read.
* @param valBytes[] - array of bytes to send
* @param nBytes - number of bytes to send.
*/
private void executeWriteCharacteristic(BluetoothGattCharacteristic gattCharacteristic, byte[] valBytes) {
gattCharacteristic.setValue(valBytes);
boolean retVal = mBluetoothGatt.writeCharacteristic(gattCharacteristic);
if (retVal) {
Log.d(TAG, "executeWriteCharacteristic - write initiated successfully");
} else {
Log.d(TAG, "executeWriteCharacteristic - write initiation failed - waiting, then re-trying");
mHandler.postDelayed(new Runnable() {
public void run() {
Log.w(TAG, "Executing delayed write of characteristic");
executeWriteCharacteristic(gattCharacteristic, valBytes);
}
}, 100);
}
}
private boolean permissionsOK() {
if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
@@ -476,6 +506,15 @@ public class SdDataSourceBLE extends SdDataSource {
doAnalysis();
// Re-start collecting raw data.
nRawData = 0;
// Notify the device of the resulting alarm state
if (mStatusChar != null) {
Log.i(TAG,"onDataReceived() - Sending analysis result");
byte[] statusVal = new byte[1];
statusVal[0] = (byte) mSdData.alarmState;
executeWriteCharacteristic(mStatusChar, statusVal);
} else {
Log.i(TAG,"onDataReceived() - mStatusChar is null - not sending result");
}
}
}
} else if (characteristic.getUuid().toString().equals(CHAR_OSD_BATT_DATA)) {