add initial support for Beurer BF500 (#1110)

android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothBeurerBF500.java

@@ -0,0 +1,121 @@
+/* Copyright (C) 2019  olie.xdev <olie.xdev@googlemail.com>
+ *
+ *    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/>
+ */
+
+ /*
+ * Based on source-code by weliem/blessed-android
+ */
+package com.health.openscale.core.bluetooth;
+
+import static com.welie.blessed.BluetoothBytesParser.FORMAT_UINT8;
+
+import android.content.Context;
+
+import com.health.openscale.core.datatypes.ScaleMeasurement;
+import com.health.openscale.core.utils.Converters;
+import com.welie.blessed.BluetoothBytesParser;
+
+import java.util.UUID;
+
+import timber.log.Timber;
+
+public class BluetoothBeurerBF500 extends BluetoothStandardWeightProfile {
+    private static final UUID SERVICE_BEURER_CUSTOM_BF500 = BluetoothGattUuid.fromShortCode(0xffff);
+    private static final UUID CHARACTERISTIC_BEURER_BF500_SCALE_SETTING = BluetoothGattUuid.fromShortCode(0xfff0);
+    private static final UUID CHARACTERISTIC_BEURER_BF500_USER_LIST = BluetoothGattUuid.fromShortCode(0xfff1);
+    private static final UUID CHARACTERISTIC_BEURER_BF500_ACTIVITY_LEVEL = BluetoothGattUuid.fromShortCode(0xfff2);
+    private static final UUID CHARACTERISTIC_BEURER_BF500_TAKE_MEASUREMENT = BluetoothGattUuid.fromShortCode(0xfff4);
+    private static final UUID CHARACTERISTIC_BEURER_BF500_REFER_WEIGHT_BF = BluetoothGattUuid.fromShortCode(0xfff5);
+
+    private String deviceName;
+
+    public BluetoothBeurerBF500(Context context, String name) {
+        super(context);
+        deviceName = name;
+    }
+
+    @Override
+    public String driverName() {
+        return "Beurer " + deviceName;
+    }
+
+    @Override
+    protected int getVendorSpecificMaxUserCount() {
+        return 8;
+    }
+
+    @Override
+    protected void writeActivityLevel() {
+        Converters.ActivityLevel al = selectedUser.getActivityLevel();
+        BluetoothBytesParser parser = new BluetoothBytesParser(new byte[]{0});
+        parser.setIntValue(al.toInt() + 1, FORMAT_UINT8, 0);
+        Timber.d(String.format("setCurrentUserData Activity level: %d", al.toInt() + 1));
+        writeBytes(SERVICE_BEURER_CUSTOM_BF500,
+                CHARACTERISTIC_BEURER_BF500_ACTIVITY_LEVEL, parser.getValue());
+    }
+
+    @Override
+    protected ScaleMeasurement bodyCompositionMeasurementToScaleMeasurement(byte[] value) {
+        ScaleMeasurement measurement = super.bodyCompositionMeasurementToScaleMeasurement(value);
+        float weight = measurement.getWeight();
+        if (weight == 0.f && previousMeasurement != null) {
+            weight = previousMeasurement.getWeight();
+        }
+        if (weight != 0.f) {
+            float water = Math.round(((measurement.getWater() / weight) * 10000.f))/100.f;
+            measurement.setWater(water);
+        }
+        return measurement;
+    }
+
+    @Override
+    protected void requestMeasurement() {
+        BluetoothBytesParser parser = new BluetoothBytesParser(new byte[]{0});
+        parser.setIntValue(0x00, FORMAT_UINT8, 0);
+        Timber.d(String.format("requestMeasurement BEURER 0xFFF4 magic: 0x00"));
+        writeBytes(SERVICE_BEURER_CUSTOM_BF500,
+                CHARACTERISTIC_BEURER_BF500_TAKE_MEASUREMENT, parser.getValue());
+    }
+
+    @Override
+    protected void setNotifyVendorSpecificUserList() {
+        if (setNotificationOn(SERVICE_BEURER_CUSTOM_BF500,
+                CHARACTERISTIC_BEURER_BF500_USER_LIST)) {
+            Timber.d("setNotifyVendorSpecificUserList() OK");
+        }
+        else {
+            Timber.d("setNotifyVendorSpecificUserList() FAILED");
+        }
+    }
+
+    @Override
+    protected synchronized void requestVendorSpecificUserList() {
+        BluetoothBytesParser parser = new BluetoothBytesParser();
+        parser.setIntValue(0x00, FORMAT_UINT8);
+        writeBytes(SERVICE_BEURER_CUSTOM_BF500, CHARACTERISTIC_BEURER_BF500_USER_LIST,
+                parser.getValue());
+        stopMachineState();
+    }
+
+    @Override
+    public void onBluetoothNotify(UUID characteristic, byte[] value) {
+        if (characteristic.equals(CHARACTERISTIC_BEURER_BF500_USER_LIST)) {
+            handleVendorSpecificUserList(value);
+        }
+        else {
+            super.onBluetoothNotify(characteristic, value);
+        }
+    }
+}

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

@@ -125,6 +125,9 @@ public class BluetoothFactory {
         if (deviceName.equals("BF105") || deviceName.equals("BF720")) {
             return new BluetoothBeurerBF105(context);
         }
+        if (deviceName.equals("BF500")) {
+            return new BluetoothBeurerBF500(context, deviceName);
+        }
         if (deviceName.equals("BF600") || deviceName.equals("BF850")) {
             return new BluetoothBeurerBF600(context, deviceName);
         }