Zepp OS: Improve logging

- Do not log characteristic changes handled by parent class
- Log discovered service names
- Request and log supported config groups

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/HuamiSupport.java

@@ -2272,9 +2272,12 @@ public abstract class HuamiSupport extends AbstractBTLEDeviceSupport implements
     @Override
     public boolean onCharacteristicChanged(BluetoothGatt gatt,
                                            BluetoothGattCharacteristic characteristic) {
-        super.onCharacteristicChanged(gatt, characteristic);
+        if (super.onCharacteristicChanged(gatt, characteristic)) {
+            // handled upstream
+            return true;
+        }
 
-        UUID characteristicUUID = characteristic.getUuid();
+        final UUID characteristicUUID = characteristic.getUuid();
         if (HuamiService.UUID_CHARACTERISTIC_6_BATTERY_INFO.equals(characteristicUUID)) {
             handleBatteryInfo(characteristic.getValue(), BluetoothGatt.GATT_SUCCESS);
             return true;
@@ -2317,7 +2320,10 @@ public abstract class HuamiSupport extends AbstractBTLEDeviceSupport implements
     @Override
     public boolean onCharacteristicRead(BluetoothGatt gatt,
                                         BluetoothGattCharacteristic characteristic, int status) {
-        super.onCharacteristicRead(gatt, characteristic, status);
+        if (super.onCharacteristicRead(gatt, characteristic, status)) {
+            // handled upstream
+            return true;
+        }
 
         UUID characteristicUUID = characteristic.getUuid();
         if (GattCharacteristic.UUID_CHARACTERISTIC_DEVICE_NAME.equals(characteristicUUID)) {

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/zeppos/services/ZeppOsConfigService.java

@@ -107,6 +107,10 @@ public class ZeppOsConfigService extends AbstractZeppOsService {
     @Override
     public void handlePayload(final byte[] payload) {
         switch (payload[0]) {
+            case CMD_CAPABILITIES_RESPONSE:
+                handleCapabilitiesResponse(payload);
+                return;
+
             case CMD_ACK:
                 LOG.info("Configuration ACK, status = {}", payload[1]);
                 return;
@@ -125,7 +129,8 @@ public class ZeppOsConfigService extends AbstractZeppOsService {
     }
 
     @Override
-    public void initialize(TransactionBuilder builder) {
+    public void initialize(final TransactionBuilder builder) {
+        write(builder, CMD_CAPABILITIES_REQUEST);
         requestAllConfigs(builder);
     }
 
@@ -152,6 +157,27 @@ public class ZeppOsConfigService extends AbstractZeppOsService {
         return false;
     }
 
+    private void handleCapabilitiesResponse(final byte[] payload) {
+        final int version = payload[1] & 0xFF;
+        LOG.info("Got config service version={}", version);
+        if (version > 3) {
+            LOG.error("Unsupported config service version {}", version);
+            return;
+        }
+        final int numGroups = payload[2] & 0xFF;
+        if (payload.length != numGroups + 3) {
+            LOG.error("Unexpected config capabilities response length {} for {} groups", payload.length, numGroups);
+            return;
+        }
+
+        for (int i = 0; i < numGroups; i++) {
+            final ConfigGroup configGroup = ConfigGroup.fromValue(payload[3 + i]);
+            LOG.debug("Got supported config group {}: {}", String.format("0x%02x", payload[3 + i]), configGroup);
+        }
+
+        // TODO: We should only request supported config groups
+    }
+
     private boolean sentFitnessGoal = false;
 
     private void handle2021ConfigResponse(final byte[] payload) {

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/zeppos/services/ZeppOsServicesService.java

@@ -72,7 +72,12 @@ public class ZeppOsServicesService extends AbstractZeppOsService {
 
             final AbstractZeppOsService service = getSupport().getService(endpoint);
 
-            LOG.debug("Service: endpoint={} encrypted={} known={}", String.format("%04x", endpoint), encrypted, service != null);
+            LOG.debug(
+                    "Zepp OS Service: endpoint={} encrypted={} name={}",
+                    String.format("%04x", endpoint),
+                    encrypted,
+                    service != null ? service.getClass().getSimpleName() : "unknown"
+            );
 
             if (service != null && encrypted != null) {
                 service.setEncrypted(encrypted);