Added support for Sanitas SBF 72 (#811)

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

@@ -123,6 +123,9 @@ public class BluetoothFactory {
         if (deviceName.equals("SBF77") || deviceName.equals("BF950")) {
             return new BluetoothBeurerBF950(context, deviceName);
         }
+        if (deviceName.equals("SBF72")) {
+            return new BluetoothSanitasSBF72(context);
+        }
         return null;
     }
 }

android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothSanitasSBF72.java

@@ -0,0 +1,137 @@
+/* Copyright (C) 2021  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 android.content.Context;
+
+import com.health.openscale.core.datatypes.ScaleMeasurement;
+import com.welie.blessed.BluetoothBytesParser;
+
+import java.util.UUID;
+
+import timber.log.Timber;
+
+import static com.welie.blessed.BluetoothBytesParser.FORMAT_UINT8;
+
+public class BluetoothSanitasSBF72 extends BluetoothStandardWeightProfile {
+    private String deviceName = "SBF72";
+
+    private static final UUID SERVICE_SBF72_CUSTOM = BluetoothGattUuid.fromShortCode(0xffff);
+
+    private static final UUID CHARACTERISTIC_SCALE_SETTINGS = BluetoothGattUuid.fromShortCode(0x0000);
+    private static final UUID CHARACTERISTIC_USER_LIST = BluetoothGattUuid.fromShortCode(0x0001);
+    private static final UUID CHARACTERISTIC_ACTIVITY_LEVEL = BluetoothGattUuid.fromShortCode(0x0004);
+    private static final UUID CHARACTERISTIC_REFER_WEIGHT_BF = BluetoothGattUuid.fromShortCode(0x000b);
+    private static final UUID CHARACTERISTIC_TAKE_MEASUREMENT = BluetoothGattUuid.fromShortCode(0x0006);
+
+    public BluetoothSanitasSBF72(Context context) {
+        super(context);
+    }
+
+    @Override
+    public String driverName() {
+        return deviceName;
+    }
+
+    @Override
+    protected int getVendorSpecificMaxUserCount() {
+        return 8;
+    }
+
+    @Override
+    protected void enterScaleUserConsentUi(int appScaleUserId, int scaleUserIndex) {
+        //Requests the scale to display the pin for the user in it's display.
+        //As parameter we need to send a pin-index to the custom user-list characteristic.
+        //For user with index 1 the pin-index is 0x11, for user with index 2 it is 0x12 and so on.
+        int scalePinIndex = scaleUserIndex + 16;
+        BluetoothBytesParser parser = new BluetoothBytesParser();
+        parser.setIntValue(scalePinIndex, FORMAT_UINT8);
+        writeBytes(SERVICE_SBF72_CUSTOM, CHARACTERISTIC_USER_LIST, parser.getValue());
+
+        //opens the input screen for the pin in the app
+        super.enterScaleUserConsentUi(appScaleUserId, scaleUserIndex);
+    }
+
+    @Override
+    public void onBluetoothNotify(UUID characteristic, byte[] value) {
+        if (characteristic.equals(CHARACTERISTIC_USER_LIST)) {
+            //the if condition is to catch the response to "display-pin-on-scale", because this response would produce an error in handleVendorSpecificUserList().
+            if (value != null && value.length > 0 && value[0] != 17) {
+                handleVendorSpecificUserList(value);
+            }
+        }
+        else {
+            super.onBluetoothNotify(characteristic, value);
+        }
+    }
+
+    @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 setNotifyVendorSpecificUserList() {
+        if (setNotificationOn(SERVICE_SBF72_CUSTOM, CHARACTERISTIC_USER_LIST)) {
+            Timber.d("setNotifyVendorSpecificUserList() OK");
+        } else {
+            Timber.d("setNotifyVendorSpecificUserList() FAILED");
+        }
+    }
+
+    @Override
+    protected synchronized void requestVendorSpecificUserList() {
+        BluetoothBytesParser parser = new BluetoothBytesParser();
+        parser.setIntValue(0, FORMAT_UINT8);
+        writeBytes(SERVICE_SBF72_CUSTOM, CHARACTERISTIC_USER_LIST, parser.getValue());
+    }
+
+    @Override
+    protected void writeActivityLevel() {
+        BluetoothBytesParser parser = new BluetoothBytesParser();
+        int activityLevel = this.selectedUser.getActivityLevel().toInt() + 1;
+        Timber.d(String.format("activityLevel: %d", activityLevel));
+        parser.setIntValue(activityLevel, FORMAT_UINT8);
+        writeBytes(SERVICE_SBF72_CUSTOM, CHARACTERISTIC_ACTIVITY_LEVEL, parser.getValue());
+    }
+
+    @Override
+    protected void writeInitials() {
+        Timber.d("Write user initials is not supported by " + deviceName + "!");
+    }
+
+    @Override
+    protected synchronized void requestMeasurement() {
+        BluetoothBytesParser parser = new BluetoothBytesParser();
+        parser.setIntValue(0, FORMAT_UINT8);
+        writeBytes(SERVICE_SBF72_CUSTOM, CHARACTERISTIC_TAKE_MEASUREMENT, parser.getValue());
+    }
+
+}