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Add support for chipsea / OKOK 2.0 scales (#706)

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add support for chipsea / OKOK 2.0 scales (only weight supported)
This commit is contained in:
Santtu Lakkala
2021-03-09 16:09:30 +02:00
committed by GitHub
parent 101a225af1
commit fd7f6d8730
2 changed files with 101 additions and 0 deletions
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3
android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothFactory.java
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@@ -118,6 +118,9 @@ public class BluetoothFactory {
} }
if (deviceName.equals("Hoffen BS-8107")) { if (deviceName.equals("Hoffen BS-8107")) {
return new BluetoothHoffenBBS8107(context); return new BluetoothHoffenBBS8107(context);
}
if (deviceName.equals("ADV")) {
return new BluetoothOKOK(context);
} }
return null; return null;
} }

98
android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothOKOK.java Normal file
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@@ -0,0 +1,98 @@
package com.health.openscale.core.bluetooth;
import android.bluetooth.le.ScanResult;
import android.content.Context;
import android.bluetooth.le.ScanFilter;
import android.os.Handler;
import android.os.Looper;
import android.util.SparseArray;
import com.health.openscale.core.datatypes.ScaleMeasurement;
import com.welie.blessed.BluetoothCentral;
import com.welie.blessed.BluetoothCentralCallback;
import com.welie.blessed.BluetoothPeripheral;
import org.jetbrains.annotations.NotNull;
import java.util.LinkedList;
import java.util.List;
import timber.log.Timber;
public class BluetoothOKOK extends BluetoothCommunication {
private static final int MANUFACTURER_DATA_ID = 0x20ca; // 16-bit little endian "header" 0xca 0x20
private static final int IDX_FINAL = 6;
private static final int IDX_WEIGHT_MSB = 8;
private static final int IDX_WEIGHT_LSB = 9;
private static final int IDX_IMPEDANCE_MSB = 10;
private static final int IDX_IMPEDANCE_LSB = 11;
private static final int IDX_CHECKSUM = 12;
private BluetoothCentral central;
private final BluetoothCentralCallback btCallback = new BluetoothCentralCallback() {
@Override
public void onDiscoveredPeripheral(@NotNull BluetoothPeripheral peripheral, @NotNull ScanResult scanResult) {
SparseArray<byte[]> manufacturerSpecificData = scanResult.getScanRecord().getManufacturerSpecificData();
byte[] data = scanResult.getScanRecord().getManufacturerSpecificData(MANUFACTURER_DATA_ID);
float divider = 10.0f;
byte checksum = 0x20; // Version field is part of the checksum, but not in array
if (data == null || data.length != 19)
return;
if ((data[IDX_FINAL] & 1) == 0)
return;
for (int i = 0; i < IDX_CHECKSUM; i++)
checksum ^= data[i];
if (data[IDX_CHECKSUM] != checksum) {
Timber.d("Checksum error, got %x, expected %x", data[12] & 0xff, checksum & 0xff);
return;
}
if ((data[IDX_FINAL] & 4) == 4)
divider = 100.0f;
int weight = data[IDX_WEIGHT_MSB] & 0xff;
weight = weight << 8 | (data[IDX_WEIGHT_LSB] & 0xff);
int impedance = data[IDX_IMPEDANCE_MSB] & 0xff;
impedance = impedance << 8 | (data[IDX_IMPEDANCE_LSB] & 0xff);
Timber.d("Got weight: %f and impedance %f", weight / divider, impedance / 10f);
ScaleMeasurement entry = new ScaleMeasurement();
entry.setWeight(weight / divider);
addScaleMeasurement(entry);
disconnect();
}
};
public BluetoothOKOK(Context context)
{
super(context);
central = new BluetoothCentral(context, btCallback, new Handler(Looper.getMainLooper()));
}
@Override
public String driverName() {
return "OKOK";
}
@Override
public void connect(String macAddress) {
Timber.d("Mac address: %s", macAddress);
List<ScanFilter> filters = new LinkedList<ScanFilter>();
ScanFilter.Builder b = new ScanFilter.Builder();
b.setDeviceAddress(macAddress);
b.setDeviceName("ADV");
b.setManufacturerData(MANUFACTURER_DATA_ID, null, null);
filters.add(b.build());
central.scanForPeripheralsUsingFilters(filters);
}
@Override
public void disconnect() {
if (central != null)
central.stopScan();
central = null;
super.disconnect();
}
@Override
protected boolean onNextStep(int stepNr) {
return false;
}
}