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https://codeberg.org/Freeyourgadget/Gadgetbridge
synced 2024-11-11 20:49:25 +01:00
Handle BT issues with discovered characteristics
It occurred to me that onServicesDiscovered() was called multiple times whenever I connected to my Mi Band 2. Either the band actually sent the characteristics in multiple chunks or Android itself notified multiple times. So we gracefully handle this by - updating the list of characteristics - *not* initializing the device again when it *is* already initialized or at least initializing.
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@ -12,10 +12,13 @@ import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Map;
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import java.util.Objects;
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import java.util.Set;
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import java.util.UUID;
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import nodomain.freeyourgadget.gadgetbridge.Logging;
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import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
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import nodomain.freeyourgadget.gadgetbridge.service.AbstractDeviceSupport;
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import nodomain.freeyourgadget.gadgetbridge.service.btle.actions.CheckInitializedAction;
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import nodomain.freeyourgadget.gadgetbridge.service.btle.profiles.AbstractBleProfile;
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@ -33,12 +36,13 @@ import nodomain.freeyourgadget.gadgetbridge.service.btle.profiles.AbstractBlePro
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*/
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public abstract class AbstractBTLEDeviceSupport extends AbstractDeviceSupport implements GattCallback {
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private BtLEQueue mQueue;
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private HashMap<UUID, BluetoothGattCharacteristic> mAvailableCharacteristics;
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private Map<UUID, BluetoothGattCharacteristic> mAvailableCharacteristics;
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private final Set<UUID> mSupportedServices = new HashSet<>(4);
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private Logger logger;
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private final List<AbstractBleProfile<?>> mSupportedProfiles = new ArrayList<>();
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public static final String BASE_UUID = "0000%s-0000-1000-8000-00805f9b34fb"; //this is common for all BTLE devices. see http://stackoverflow.com/questions/18699251/finding-out-android-bluetooth-le-gatt-profiles
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private final Object characteristicsMonitor = new Object();
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public AbstractBTLEDeviceSupport(Logger logger) {
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this.logger = logger;
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@ -166,11 +170,13 @@ public abstract class AbstractBTLEDeviceSupport extends AbstractDeviceSupport im
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* @see #addSupportedService(UUID)
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*/
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public BluetoothGattCharacteristic getCharacteristic(UUID uuid) {
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synchronized (characteristicsMonitor) {
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if (mAvailableCharacteristics == null) {
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return null;
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}
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return mAvailableCharacteristics.get(uuid);
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}
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}
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private void gattServicesDiscovered(List<BluetoothGattService> discoveredGattServices) {
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if (discoveredGattServices == null) {
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@ -178,7 +184,7 @@ public abstract class AbstractBTLEDeviceSupport extends AbstractDeviceSupport im
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return;
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}
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Set<UUID> supportedServices = getSupportedServices();
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mAvailableCharacteristics = new HashMap<>();
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Map<UUID, BluetoothGattCharacteristic> newCharacteristics = new HashMap<>();
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for (BluetoothGattService service : discoveredGattServices) {
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if (supportedServices.contains(service.getUuid())) {
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logger.debug("discovered supported service: " + BleNamesResolver.resolveServiceName(service.getUuid().toString()) + ": " + service.getUuid());
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@ -192,7 +198,11 @@ public abstract class AbstractBTLEDeviceSupport extends AbstractDeviceSupport im
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intmAvailableCharacteristics.put(characteristic.getUuid(), characteristic);
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logger.info(" characteristic: " + BleNamesResolver.resolveCharacteristicName(characteristic.getUuid().toString()) + ": " + characteristic.getUuid());
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}
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mAvailableCharacteristics.putAll(intmAvailableCharacteristics);
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newCharacteristics.putAll(intmAvailableCharacteristics);
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synchronized (characteristicsMonitor) {
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mAvailableCharacteristics = newCharacteristics;
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}
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} else {
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logger.debug("discovered unsupported service: " + BleNamesResolver.resolveServiceName(service.getUuid().toString()) + ": " + service.getUuid());
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}
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@ -224,6 +234,11 @@ public abstract class AbstractBTLEDeviceSupport extends AbstractDeviceSupport im
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@Override
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public void onServicesDiscovered(BluetoothGatt gatt) {
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gattServicesDiscovered(gatt.getServices());
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if (getDevice().getState().compareTo(GBDevice.State.INITIALIZING) >= 0) {
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logger.warn("Services discovered, but device state is already " + getDevice().getState() + " for device: " + getDevice() + ", so ignoring");
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return;
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}
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initializeDevice(createTransactionBuilder("Initializing device")).queue(getQueue());
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}
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