Android Studio read characteristics faster

Question

I'm trying to develop a simple Wear Os application to receive data from Arduino. I'm using an Arduino Nano 33 BLE and a Smartwatch Fossil.

In my Arduino code I have: characteristic.writeValue(data, DATA_SIZE);. Data is sent every 10 ms, but I can read data every 100ms on Android Studio.

BluetoothGattCallback gattCallback = new BluetoothGattCallback() {
        @Override
        public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
            
            if (newState == BluetoothProfile.STATE_CONNECTED){
                
                gatt.discoverServices();
            }
            else {
                gatt.disconnect();
            }
        }
        @Override
        
        public void onServicesDiscovered(BluetoothGatt gatt, int status) {
           
            BluetoothGattCharacteristic characteristic = gatt.getService(ARDUINO_SERVICE_UUID).getCharacteristic(IMU_DATA_UUID);
            gatt.setCharacteristicNotification(characteristic,true);
            BluetoothGattDescriptor descriptor = characteristic.getDescriptor(CLIENT_CHARACTERISTIC_CONFIG_UUID);
            descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
            gatt.writeDescriptor(descriptor);
        }
        @Override
       
        public void onCharacteristicChanged(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic) {
            gatt.readCharacteristic(characteristic);
        }
        @Override
        public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
            super.onCharacteristicRead(gatt, characteristic, status);
            //here will should receive data
            byte[] data = characteristic.getValue(); // Get the stored value for this characteristic.
            System.out.println(System.currentTimeMillis());
          
        }
    };

question from:https://stackoverflow.com/questions/66049986/android-studio-read-characteristics-faster

Answer 1

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