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Pebble 2: React to MTU notifications, fixes LE for older pebbles also

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It seems that setting the MTU on older pebbles does not work, so just use what we can use.
Maybe old pebbles need setMTU() which only works on Android 5+, we could use that conditionally...
This commit is contained in:
Andreas Shimokawa 2016-11-18 23:36:27 +01:00
parent 51fa31aa66
commit 4dc085de57
2 changed files with 19 additions and 7 deletions
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16
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/pebble/ble/PebbleGATTClient.java
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@ -15,6 +15,7 @@ import java.util.UUID;
import nodomain.freeyourgadget.gadgetbridge.util.GB; import nodomain.freeyourgadget.gadgetbridge.util.GB;
import static android.bluetooth.BluetoothGattCharacteristic.FORMAT_UINT16;
import static android.bluetooth.BluetoothGattCharacteristic.PROPERTY_WRITE; import static android.bluetooth.BluetoothGattCharacteristic.PROPERTY_WRITE;
@ -32,15 +33,17 @@ class PebbleGATTClient extends BluetoothGattCallback {
private final String mBtDeviceAddress; private final String mBtDeviceAddress;
private final BluetoothDevice mBtDevice; private final BluetoothDevice mBtDevice;
private final Context mContext; private final Context mContext;
private final PebbleLESupport mPebbleLESupport;
private boolean oldPebble = false; private boolean oldPebble = false;
private boolean doPairing = true; private boolean doPairing = true;
private boolean removeBond = false; private boolean removeBond = false;
private BluetoothGatt mBluetoothGatt; private BluetoothGatt mBluetoothGatt;
PebbleGATTClient(Context context, BluetoothDevice btDevice) { PebbleGATTClient(PebbleLESupport pebbleLESupport, Context context, BluetoothDevice btDevice) {
mContext = context; mContext = context;
mBtDevice = btDevice; mBtDevice = btDevice;
mPebbleLESupport = pebbleLESupport;
mBtDeviceAddress = btDevice.getAddress(); mBtDeviceAddress = btDevice.getAddress();
} }
@ -54,7 +57,13 @@ class PebbleGATTClient extends BluetoothGattCallback {
LOG.info("onCharacteristicChanged() unexpected device: " + gatt.getDevice().getAddress() + " , expected: " + mBtDeviceAddress); LOG.info("onCharacteristicChanged() unexpected device: " + gatt.getDevice().getAddress() + " , expected: " + mBtDeviceAddress);
return; return;
} }
LOG.info("onCharacteristicChanged()" + characteristic.getUuid().toString() + " " + GB.hexdump(characteristic.getValue(), 0, -1)); if (characteristic.getUuid().equals(MTU_CHARACTERISTIC)) {
int newMTU = characteristic.getIntValue(FORMAT_UINT16, 0);
mPebbleLESupport.setMTU(newMTU);
LOG.info("Pebble requested MTU = " + newMTU);
} else {
LOG.info("onCharacteristicChanged()" + characteristic.getUuid().toString() + " " + GB.hexdump(characteristic.getValue(), 0, -1));
}
} }
public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) { public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
@ -141,8 +150,7 @@ class PebbleGATTClient extends BluetoothGattCallback {
if ((characteristic.getProperties() & PROPERTY_WRITE) != 0) { if ((characteristic.getProperties() & PROPERTY_WRITE) != 0) {
characteristic.setValue(new byte[]{1}); characteristic.setValue(new byte[]{1});
gatt.writeCharacteristic(characteristic); gatt.writeCharacteristic(characteristic);
} } else {
else {
LOG.info("This seems to be some <4.0 FW Pebble, reading pairing trigger"); LOG.info("This seems to be some <4.0 FW Pebble, reading pairing trigger");
gatt.readCharacteristic(characteristic); gatt.readCharacteristic(characteristic);
} }

10
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/pebble/ble/PebbleLESupport.java
View File

@ -19,6 +19,7 @@ public class PebbleLESupport {
private PebbleGATTClient mPebbleGATTClient; private PebbleGATTClient mPebbleGATTClient;
private PipedInputStream mPipedInputStream; private PipedInputStream mPipedInputStream;
private PipedOutputStream mPipedOutputStream; private PipedOutputStream mPipedOutputStream;
private int mMTU = 20;
public PebbleLESupport(Context context, final String btDeviceAddress, PipedInputStream pipedInputStream, PipedOutputStream pipedOutputStream) { public PebbleLESupport(Context context, final String btDeviceAddress, PipedInputStream pipedInputStream, PipedOutputStream pipedOutputStream) {
@ -37,7 +38,7 @@ public class PebbleLESupport {
mPebbleGATTServer = new PebbleGATTServer(this, context, btDevice); mPebbleGATTServer = new PebbleGATTServer(this, context, btDevice);
mPebbleGATTServer.initialize(); mPebbleGATTServer.initialize();
mPebbleGATTClient = new PebbleGATTClient(context, btDevice); mPebbleGATTClient = new PebbleGATTClient(this, context, btDevice);
mPebbleGATTClient.initialize(); mPebbleGATTClient.initialize();
} }
@ -83,13 +84,16 @@ public class PebbleLESupport {
} }
} }
void setMTU(int mtu) {
mMTU = mtu;
}
private class PipeReader extends Thread { private class PipeReader extends Thread {
int mmSequence = 0; int mmSequence = 0;
private boolean mQuit = false; private boolean mQuit = false;
@Override @Override
public void run() { public void run() {
int MTU = 339 - 3;
byte[] buf = new byte[8192]; byte[] buf = new byte[8192];
int bytesRead; int bytesRead;
while (!mQuit) { while (!mQuit) {
@ -113,7 +117,7 @@ public class PebbleLESupport {
int payloadToSend = bytesRead + 4; int payloadToSend = bytesRead + 4;
int srcPos = 0; int srcPos = 0;
while (payloadToSend > 0) { while (payloadToSend > 0) {
int chunkSize = (payloadToSend < (MTU - 1)) ? payloadToSend : MTU - 1; int chunkSize = (payloadToSend < (mMTU - 4)) ? payloadToSend : mMTU - 4;
byte[] outBuf = new byte[chunkSize + 1]; byte[] outBuf = new byte[chunkSize + 1];
outBuf[0] = (byte) ((mmSequence++ << 3) & 0xff); outBuf[0] = (byte) ((mmSequence++ << 3) & 0xff);
System.arraycopy(buf, srcPos, outBuf, 1, chunkSize); System.arraycopy(buf, srcPos, outBuf, 1, chunkSize);