Skeleton for inlife scale (#352)

android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothFactory.java

@@ -86,6 +86,9 @@ public class BluetoothFactory {
             // Trisa Body Analyze 4.0, aka Transtek GBF-1257-B
             return new BluetoothTrisaBodyAnalyze(context);
         }
+        if (deviceName.equals("000FatScale01")) {
+            return new BluetoothInlife(context);
+        }
         return null;
     }
 }

android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothInlife.java

@@ -0,0 +1,93 @@
+/* Copyright (C) 2018 Erik Johansson <erik@ejohansson.se>
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, either version 3 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package com.health.openscale.core.bluetooth;
+
+import android.bluetooth.BluetoothGatt;
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.content.Context;
+
+import com.health.openscale.core.datatypes.ScaleMeasurement;
+import com.health.openscale.core.utils.Converters;
+
+import java.util.UUID;
+
+import timber.log.Timber;
+
+public class BluetoothInlife extends BluetoothCommunication {
+    private final UUID WEIGHT_SERVICE = BluetoothGattUuid.fromShortCode(0xfff0);
+    private final UUID WEIGHT_MEASUREMENT_CHARACTERISTIC = BluetoothGattUuid.fromShortCode(0xfff1);
+    private final UUID WEIGHT_CMD_CHARACTERISTIC = BluetoothGattUuid.fromShortCode(0xfff2);
+
+    public BluetoothInlife(Context context) {
+        super(context);
+    }
+
+    @Override
+    public String driverName() {
+        return "Inlinfe";
+    }
+
+    @Override
+    protected boolean nextInitCmd(int stateNr) {
+        switch (stateNr) {
+            case 0:
+                setNotificationOn(WEIGHT_SERVICE, WEIGHT_MEASUREMENT_CHARACTERISTIC,
+                        BluetoothGattUuid.DESCRIPTOR_CLIENT_CHARACTERISTIC_CONFIGURATION);
+                break;
+            default:
+                return false;
+        }
+
+        return true;
+    }
+
+    @Override
+    protected boolean nextBluetoothCmd(int stateNr) {
+        return false;
+    }
+
+    @Override
+    protected boolean nextCleanUpCmd(int stateNr) {
+        return false;
+    }
+
+    @Override
+    public void onBluetoothDataChange(BluetoothGatt bluetoothGatt, BluetoothGattCharacteristic gattCharacteristic) {
+        final byte[] data = gattCharacteristic.getValue();
+
+        if (data == null || data.length != 14) {
+            return;
+        }
+
+        if (data[0] != (byte)0x02 || data[data.length - 1] != (byte)0xaa) {
+            Timber.d("Wrong start or end byte");
+            return;
+        }
+
+        if (data[1] != (byte)0xdd) {
+            Timber.d("Measurement not done yet");
+            return;
+        }
+
+        float weight = Converters.fromUnsignedInt16Be(data, 2) / 10.0f;
+
+        ScaleMeasurement measurement = new ScaleMeasurement();
+        measurement.setWeight(weight);
+
+        addScaleData(measurement);
+    }
+}