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Add code to support Trisa Body Analyze 4.0 smart scale.

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This commit is contained in:
Maks Verver
2018-09-30 20:47:04 +02:00
parent f073148c4e
commit 5136bc3660
2 changed files with 229 additions and 0 deletions
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4
android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothFactory.java
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@@ -81,6 +81,10 @@ public class BluetoothFactory {
if (deviceName.startsWith("YUNMAI-ISSE")) {
return new BluetoothYunmaiSE_Mini(context, false);
}
if (deviceName.startsWith("01257B") || deviceName.startsWith("11257B")) {
// Trisa Body Analyze 4.0, aka Transtek GBF-1257-B
return new BluetoothTrisaBodyAnalyze(context);
}
return null;
}
}

225
android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothTrisaBodyAnalyze.java Normal file
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@@ -0,0 +1,225 @@
/* Copyright (C) 2018 Maks Verver <maks@verver.ch>
*
* 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 android.support.annotation.Nullable;
import com.health.openscale.core.datatypes.ScaleMeasurement;
import java.util.Date;
import java.util.UUID;
import timber.log.Timber;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static java.util.concurrent.TimeUnit.SECONDS;
/**
* Driver for Trisa Body Analyze 4.0.
*
* @see <a href="https://github.com/maksverver/trisa-body-analyze">Protocol details</a>
*/
public class BluetoothTrisaBodyAnalyze extends BluetoothCommunication {
// GATT service UUID
private static final UUID WEIGHT_SCALE_SERVICE_UUID =
UUID.fromString("00007802-0000-1000-8000-00805f9b34fb");
// GATT descriptor.
private static final UUID CLIENT_CHARACTERISTIC_CONFIGURATION_DESCRIPTOR_UUID =
UUID.fromString("00002902-0000-1000-8000-00805f9b34fb");
// GATT service characteristics.
private static final UUID MEASUREMENT_CHARACTERISTIC_UUID =
UUID.fromString("00008a21-0000-1000-8000-00805f9b34fb");
private static final UUID APPEND_MEASUREMENT_CHARACTERISTIC_UUID =
UUID.fromString("00008a22-0000-1000-8000-00805f9b34fb");
private static final UUID DOWNLOAD_COMMAND_CHARACTERISTIC_UUID =
UUID.fromString("00008a81-0000-1000-8000-00805f9b34fb");
private static final UUID UPLOAD_COMMAND_CHARACTERISTIC_UUID =
UUID.fromString("00008a82-0000-1000-8000-00805f9b34fb");
// Commands sent from device to host.
private static final byte UPLOAD_PASSWORD = (byte) 0xa0;
private static final byte UPLOAD_CHALLENGE = (byte) 0xa1;
// Commands sent from host to device.
private static final byte DOWNLOAD_INFORMATION_UTC_COMMAND = 0x02;
private static final byte DOWNLOAD_INFORMATION_RESULT_COMMAND = 0x20;
private static final byte DOWNLOAD_INFORMATION_BROADCAST_ID_COMMAND = 0x21;
private static final byte DOWNLOAD_INFORMATION_ENABLE_DISCONNECT_COMMAND = 0x22;
// Timestamp of 2010-01-01 00:00:00 UTC (or local time?)
private final long TIMESTAMP_OFFSET_SECONDS = 1262304000L;
// TODO: don't hardcode this.
//private byte[] PASSWORD = new byte[]{(byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00};
public BluetoothTrisaBodyAnalyze(Context context) {
super(context);
}
@Override
public String driverName() {
return "Trisa Body Analyze 4.0";
}
@Override
public void connect(String hwAddress) {
Timber.i("connect(\"%s\")", hwAddress);
super.connect(hwAddress);
}
@Override
public void disconnect(boolean doCleanup) {
Timber.i("disconnect(/*doCleanup=*/%s)", doCleanup);
super.disconnect(doCleanup);
}
@Override
protected boolean nextInitCmd(int stateNr) {
Timber.i("nextInitCmd(%d)", stateNr);
switch (stateNr) {
case 0:
setIndicationOn(
WEIGHT_SCALE_SERVICE_UUID,
MEASUREMENT_CHARACTERISTIC_UUID,
CLIENT_CHARACTERISTIC_CONFIGURATION_DESCRIPTOR_UUID);
return true;
case 1:
setIndicationOn(
WEIGHT_SCALE_SERVICE_UUID,
UPLOAD_COMMAND_CHARACTERISTIC_UUID,
CLIENT_CHARACTERISTIC_CONFIGURATION_DESCRIPTOR_UUID);
return true;
default:
return false;
}
}
@Override
protected boolean nextBluetoothCmd(int stateNr) {
Timber.i("nextBluetoothCmd(%d)", stateNr);
return false;
}
@Override
protected boolean nextCleanUpCmd(int stateNr) {
Timber.i("nextCleanUpCmd(%d)", stateNr);
switch (stateNr) {
case 0:
writeCommand(disconnectCommand());
return true;
default:
return false;
}
}
@Override
protected void onBluetoothDataChange(BluetoothGatt bluetoothGatt, BluetoothGattCharacteristic gattCharacteristic) {
UUID characteristicUud = gattCharacteristic.getUuid();
byte[] value = gattCharacteristic.getValue();
Timber.i("onBluetoothdataChange() characteristic=%s value=%s", characteristicUud, byteInHex(value));
byte commandByte = value.length > 0 ? value[0] : 0;
if (UPLOAD_COMMAND_CHARACTERISTIC_UUID.equals(characteristicUud)) {
switch (commandByte) {
case UPLOAD_PASSWORD:
// TODO: support pairing, then store this somewhere.
break;
case UPLOAD_CHALLENGE:
if (value.length < 5) {
break;
}
byte[] authCommand = new byte[] {
DOWNLOAD_INFORMATION_RESULT_COMMAND,
(byte)(value[1] ^ PASSWORD[0]),
(byte)(value[2] ^ PASSWORD[1]),
(byte)(value[3] ^ PASSWORD[2]),
(byte)(value[4] ^ PASSWORD[3])};
writeCommand(authCommand);
int timestamp = (int)(System.currentTimeMillis()/1000 - TIMESTAMP_OFFSET_SECONDS);
byte[] setUtcCommand = new byte[]{
DOWNLOAD_INFORMATION_UTC_COMMAND,
(byte)(timestamp >> 0),
(byte)(timestamp >> 8),
(byte)(timestamp >> 16),
(byte)(timestamp >> 24),
};
writeCommand(setUtcCommand);
return;
}
} else if (MEASUREMENT_CHARACTERISTIC_UUID.equals(characteristicUud)) {
ScaleMeasurement scaleMeasurement = parseScaleMeasurementData(value);
if (scaleMeasurement != null) {
addScaleData(scaleMeasurement);
return;
}
}
Timber.w("Unhandled data!");
}
private byte[] disconnectCommand() {
return new byte[]{DOWNLOAD_INFORMATION_ENABLE_DISCONNECT_COMMAND};
}
private void writeCommand(byte[] bytes) {
writeBytes(WEIGHT_SCALE_SERVICE_UUID, DOWNLOAD_COMMAND_CHARACTERISTIC_UUID, bytes);
}
@Nullable
private ScaleMeasurement parseScaleMeasurementData(byte[] data) {
// Byte 0 contains info.
// Byte 1-4 contains weight.
// Byte 5-8 contains timestamp, if bit 0 in info byte is set.
// Check that we have at least weight & timestamp, which is the minimum information that
// ScaleMeasurement needs.
if (data.length < 9 || (data[0] & 1) == 0) {
return null;
}
double weight = getBase10Float(data, 1);
long timestamp_seconds = TIMESTAMP_OFFSET_SECONDS + (long)getInt32(data, 5);
ScaleMeasurement measurement = new ScaleMeasurement();
measurement.setDateTime(new Date(MILLISECONDS.convert(timestamp_seconds, SECONDS)));
measurement.setWeight((float)weight);
// TODO: calculate body composition (if possible) and set those fields too
return measurement;
}
/** Converts 4 little-endian bytes to a 32-bit integer. */
private static int getInt32(byte[] data, int offset) {
return (data[offset] & 0xff) | ((data[offset + 1] & 0xff) << 8) |
((data[offset + 2] & 0xff) << 16) | ((data[offset + 3] & 0xff) << 24);
}
/** Converts 4 bytes to a floating point number.
*
* <p>The first three little-endian bytes form the 24-bit mantissa. The last byte contains the
* signed exponent, applied in base 10.
*/
private double getBase10Float(byte[] data, int offset) {
int mantissa = (data[offset] & 0xff) | ((data[offset + 1] & 0xff) << 8) |
((data[offset + 2] & 0xff) << 16);
int exponent = data[offset + 3]; // note: byte is signed.
return mantissa * Math.pow(10, exponent);
}
}