mirror of
https://github.com/oliexdev/openScale.git
synced 2025-08-18 22:41:44 +02:00
read Mi Scale history weight measurements
This commit is contained in:
OliE
@@ -27,7 +27,6 @@ import android.bluetooth.BluetoothGatt;
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import android.bluetooth.BluetoothGattCallback;
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import android.bluetooth.BluetoothGattCharacteristic;
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import android.bluetooth.BluetoothGattDescriptor;
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import android.bluetooth.BluetoothGattService;
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import android.bluetooth.BluetoothProfile;
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import android.content.Context;
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import android.os.Handler;
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@@ -35,26 +34,32 @@ import android.util.Log;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.UUID;
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public class BluetoothMiScale extends BluetoothCommunication {
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private BluetoothGatt bluetoothGatt;
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private BluetoothGattCharacteristic weightCharacteristic;
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private BluetoothAdapter.LeScanCallback scanCallback;
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private BluetoothAdapter.LeScanCallback scanCallback = null;
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private BluetoothGattCallback gattCallback = null;
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private final UUID WEIGHT_MEASUREMENT_SERVICE = UUID.fromString("0000181d-0000-1000-8000-00805f9b34fb");
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private final UUID WEIGHT_MEASUREMENT_CHARACTERISTIC = UUID.fromString("00002a9d-0000-1000-8000-00805f9b34fb");
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private final UUID WEIGHT_MEASUREMENT_HISTORY_CHARACTERISTIC = UUID.fromString("00002a2f-0000-3512-2118-0009af100700");
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private final UUID WEIGHT_MEASUREMENT_TIME_CHARACTERISTIC = UUID.fromString("00002a2b-0000-1000-8000-00805f9b34fb");
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private final UUID WEIGHT_MEASUREMENT_CONFIG = UUID.fromString("00002902-0000-1000-8000-00805f9b34fb");
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private Handler searchHandler;
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private Context context;
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private String btDeviceName;
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private int nextState;
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private boolean restartDiscovery;;
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public BluetoothMiScale(Context con) {
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searchHandler = new Handler();
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context = con;
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scanCallback = null;
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}
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@Override
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@@ -63,8 +68,24 @@ public class BluetoothMiScale extends BluetoothCommunication {
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if (scanCallback == null)
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{
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Log.d("StartStopBLEScanning", "No callback method, making one...");
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prepareBLECallback();
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scanCallback = new BluetoothAdapter.LeScanCallback()
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{
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@Override
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public void onLeScan(final BluetoothDevice device, int rssi, byte[] scanRecord)
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{
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if (device.getAddress().replace(":", "").startsWith("880f10") ||
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device.getAddress().replace(":", "").startsWith("880F10")) // Xiaomi
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{
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if (device.getName().equals(btDeviceName)) { // It really is scale
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Log.d("BluetoothMiScale", "Mi Scale found trying to connect...");
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bluetoothGatt = device.connectGatt(context, false, gattCallback);
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searchHandler.removeCallbacksAndMessages(null);
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btAdapter.stopLeScan(scanCallback);
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}
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}
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}
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};
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}
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@@ -93,160 +114,241 @@ public class BluetoothMiScale extends BluetoothCommunication {
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btAdapter.stopLeScan(scanCallback);
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}
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private void prepareBLECallback()
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{
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scanCallback = new BluetoothAdapter.LeScanCallback()
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{
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@Override
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public void onLeScan(final BluetoothDevice device, int rssi, byte[] scanRecord)
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{
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if (device.getAddress().replace(":", "").startsWith("880f10") ||
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device.getAddress().replace(":", "").startsWith("880F10")) // Xiaomi
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{
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if (device.getName().equals(btDeviceName)) { // It really is scale
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if (gattCallback == null) {
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Log.d("StartGatt", "No callback method, making one...");
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prepareGATTCallback();
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}
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private BluetoothGattCallback gattCallback= new BluetoothGattCallback() {
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@Override
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public void onConnectionStateChange(final BluetoothGatt gatt, int status, int newState) {
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if (newState == BluetoothProfile.STATE_CONNECTED) {
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Log.d("BluetoothMiScale", "Connection established");
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callbackBtHandler.obtainMessage(BluetoothCommunication.BT_CONNECTION_ESTABLISHED).sendToTarget();
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gatt.discoverServices();
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} else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
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Log.d("BluetoothMiScale", "Connection lost");
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callbackBtHandler.obtainMessage(BluetoothCommunication.BT_CONNECTION_LOST).sendToTarget();
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stopSearching();
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}
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}
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bluetoothGatt = device.connectGatt(context, false, gattCallback);
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@Override
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public void onServicesDiscovered(final BluetoothGatt gatt, int status) {
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restartDiscovery = false;
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nextState = 0;
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searchHandler.removeCallbacksAndMessages(null);
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btAdapter.stopLeScan(scanCallback);
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invokeNextBluetoothCmd(gatt);
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}
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private void invokeNextBluetoothCmd(BluetoothGatt gatt) {
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BluetoothGattCharacteristic characteristic;
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BluetoothGattDescriptor descriptor;
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Log.d("BluetoothMiScale", "Bluetooth Cmd State: " + nextState);
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switch (nextState) {
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case 0:
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// read device time
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characteristic = gatt.getService(WEIGHT_MEASUREMENT_SERVICE)
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.getCharacteristic(WEIGHT_MEASUREMENT_TIME_CHARACTERISTIC);
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gatt.readCharacteristic(characteristic);
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break;
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case 1:
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// set notification on for weight measurement
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characteristic = gatt.getService(WEIGHT_MEASUREMENT_SERVICE)
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.getCharacteristic(WEIGHT_MEASUREMENT_CHARACTERISTIC);
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gatt.setCharacteristicNotification(characteristic, true);
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descriptor = characteristic.getDescriptor(WEIGHT_MEASUREMENT_CONFIG);
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descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
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gatt.writeDescriptor(descriptor);
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break;
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case 2:
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// set notification on for weight measurement history
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characteristic = gatt.getService(WEIGHT_MEASUREMENT_SERVICE)
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.getCharacteristic(WEIGHT_MEASUREMENT_HISTORY_CHARACTERISTIC);
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gatt.setCharacteristicNotification(characteristic, true);
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descriptor = characteristic.getDescriptor(WEIGHT_MEASUREMENT_CONFIG);
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descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
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gatt.writeDescriptor(descriptor);
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break;
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case 3:
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// Invoke receiving history data
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characteristic = gatt.getService(WEIGHT_MEASUREMENT_SERVICE)
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.getCharacteristic(WEIGHT_MEASUREMENT_HISTORY_CHARACTERISTIC);
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characteristic.setValue(new byte[]{0x02});
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gatt.writeCharacteristic(characteristic);
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break;
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case 4:
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// Stop receiving history data
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/*characteristic = gatt.getService(WEIGHT_MEASUREMENT_SERVICE)
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.getCharacteristic(WEIGHT_MEASUREMENT_HISTORY_CHARACTERISTIC);
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characteristic.setValue(new byte[]{0x03});
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gatt.writeCharacteristic(characteristic);*/
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break;
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case 5:
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// Stop state machine
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break;
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default:
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Log.e("BluetoothMiScale", "Error invalid Bluetooth State");
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break;
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}
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}
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@Override
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public void onDescriptorWrite(BluetoothGatt gatt,
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BluetoothGattDescriptor descriptor,
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int status) {
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nextState++;
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invokeNextBluetoothCmd(gatt);
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}
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@Override
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public void onCharacteristicWrite (BluetoothGatt gatt,
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BluetoothGattCharacteristic characteristic,
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int status) {
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if (restartDiscovery) {
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stopSearching();
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startSearching(btDeviceName);
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}
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nextState++;
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invokeNextBluetoothCmd(gatt);
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}
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@Override
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public void onCharacteristicRead (BluetoothGatt gatt,
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BluetoothGattCharacteristic characteristic,
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int status) {
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byte[] data = characteristic.getValue();
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int currentYear = Calendar.getInstance().get(Calendar.YEAR);
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int scaleYear = ((data[1] & 0xFF) << 8) | (data[0] & 0xFF);
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if (currentYear != scaleYear) {
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Log.d("BluetoothMiScale", "Current year and scale year is different");
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setCurrentTimeOnDevice(gatt);
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} else {
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nextState++;
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invokeNextBluetoothCmd(gatt);
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}
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}
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@Override
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public void onCharacteristicChanged(BluetoothGatt gatt,
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BluetoothGattCharacteristic characteristic) {
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final byte[] data = characteristic.getValue();
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Log.d("BluetoothMiScale", "Char changed");
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printByteInHex(data);
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if (data != null && data.length > 0) {
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if (data.length == 20) {
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final byte[] firstWeight = Arrays.copyOfRange(data, 0, 10);
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final byte[] secondWeight = Arrays.copyOfRange(data, 10, 20);
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parseBytes(firstWeight);
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parseBytes(secondWeight);
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}
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if (data.length == 10) {
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parseBytes(data);
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}
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}
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}
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private void setCurrentTimeOnDevice(BluetoothGatt gatt) {
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// set current time
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BluetoothGattCharacteristic characteristic = gatt.getService(WEIGHT_MEASUREMENT_SERVICE)
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.getCharacteristic(WEIGHT_MEASUREMENT_TIME_CHARACTERISTIC);
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Log.d("BluetoothMiScale", "Set current time on Mi scale");
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Calendar currentDateTime = Calendar.getInstance();
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int year = currentDateTime.get(Calendar.YEAR);
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byte month = (byte)(currentDateTime.get(Calendar.MONTH)+1);
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byte day = (byte)currentDateTime.get(Calendar.DAY_OF_MONTH);
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byte hour = (byte)currentDateTime.get(Calendar.HOUR_OF_DAY);
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byte min = (byte)currentDateTime.get(Calendar.MINUTE);
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byte sec = (byte)currentDateTime.get(Calendar.SECOND);
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byte[] dateTimeByte = {(byte)(year), (byte)(year >> 8), month, day, hour, min, sec, 0x03, 0x00, 0x00};
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restartDiscovery = true;
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characteristic.setValue(dateTimeByte);
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gatt.writeCharacteristic(characteristic);
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}
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private void parseBytes(byte[] weightBytes) {
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try {
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float weight = 0.0f;
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final byte ctrlByte = weightBytes[0];
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final boolean isWeightRemoved = isBitSet(ctrlByte, 7);
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final boolean isStabilized = isBitSet(ctrlByte, 5);
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final boolean isLBSUnit = isBitSet(ctrlByte, 0);
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final boolean isCattyUnit = isBitSet(ctrlByte, 4);
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/*Log.d("GattCallback", "IsWeightRemoved: " + isBitSet(ctrlByte, 7));
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Log.d("GattCallback", "6 LSB Unknown: " + isBitSet(ctrlByte, 6));
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Log.d("GattCallback", "IsStabilized: " + isBitSet(ctrlByte, 5));
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Log.d("GattCallback", "IsCattyOrKg: " + isBitSet(ctrlByte, 4));
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Log.d("GattCallback", "3 LSB Unknown: " + isBitSet(ctrlByte, 3));
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Log.d("GattCallback", "2 LSB Unknown: " + isBitSet(ctrlByte, 2));
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Log.d("GattCallback", "1 LSB Unknown: " + isBitSet(ctrlByte, 1));
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Log.d("GattCallback", "IsLBS: " + isBitSet(ctrlByte, 0));*/
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// Only if the value is stabilized and the weight is *not* removed, the date is valid
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if (isStabilized && !isWeightRemoved) {
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final int year = ((weightBytes[4] & 0xFF) << 8) | (weightBytes[3] & 0xFF);
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final int month = (int) weightBytes[5];
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final int day = (int) weightBytes[6];
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final int hours = (int) weightBytes[7];
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final int min = (int) weightBytes[8];
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final int sec = (int) weightBytes[9];
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if (isLBSUnit || isCattyUnit) {
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weight = (float) (((weightBytes[2] & 0xFF) << 8) | (weightBytes[1] & 0xFF)) / 100.0f;
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} else {
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weight = (float) (((weightBytes[2] & 0xFF) << 8) | (weightBytes[1] & 0xFF)) / 200.0f;
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}
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String date_string = year + "/" + month + "/" + day + "/" + hours + "/" + min;
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Date date_time = new SimpleDateFormat("yyyy/MM/dd/HH/mm").parse(date_string);
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ScaleData scaleBtData = new ScaleData();
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scaleBtData.weight = weight;
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scaleBtData.date_time = date_time;
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callbackBtHandler.obtainMessage(BluetoothCommunication.BT_RETRIEVE_SCALE_DATA, scaleBtData).sendToTarget();
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}
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} catch (ParseException e) {
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callbackBtHandler.obtainMessage(BluetoothCommunication.BT_UNEXPECTED_ERROR, "Error while decoding bluetooth date string (" + e.getMessage() + ")").sendToTarget();
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}
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};
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}
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}
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private boolean isBitSet(byte value, int bit) {
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return (value & (1 << bit)) != 0;
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}
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private void prepareGATTCallback()
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{
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gattCallback = new BluetoothGattCallback()
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{
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@Override
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public void onConnectionStateChange(final BluetoothGatt gatt, int status, int newState)
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{
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super.onConnectionStateChange(gatt, status, newState);
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if (newState == BluetoothProfile.STATE_CONNECTED)
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{
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callbackBtHandler.obtainMessage(BluetoothCommunication.BT_CONNECTION_ESTABLISHED).sendToTarget();
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gatt.discoverServices();
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}
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else if (newState == BluetoothProfile.STATE_DISCONNECTED)
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{
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callbackBtHandler.obtainMessage(BluetoothCommunication.BT_CONNECTION_LOST).sendToTarget();
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stopSearching();
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}
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private void printByteInHex(byte[] data) {
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if (data == null) {
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Log.e("BluetoothMiScale", "Data is null");
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return;
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}
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@Override
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public void onServicesDiscovered(final BluetoothGatt gatt, int status)
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{
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super.onServicesDiscovered(gatt, status);
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ArrayList<BluetoothGattService> serviceList = (ArrayList) gatt.getServices();
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for (BluetoothGattService one : serviceList)
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{
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if (one != null)
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{
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ArrayList<BluetoothGattCharacteristic> characteristicsList = (ArrayList) one.getCharacteristics();
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for (BluetoothGattCharacteristic two : characteristicsList)
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{
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if (two.getUuid().toString().startsWith("00002a9d"))
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{
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// Weight param discovered
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Log.d(gatt.getDevice().getName(), "(" + gatt.getDevice().getAddress() + ")");
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weightCharacteristic = two;
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// Start constant notification
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bluetoothGatt.setCharacteristicNotification(weightCharacteristic, true);
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ArrayList<BluetoothGattDescriptor> descriptors = (ArrayList<BluetoothGattDescriptor>) weightCharacteristic.getDescriptors();
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if ( descriptors.size() == 1 )
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{
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descriptors.get(0).setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
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bluetoothGatt.writeDescriptor(descriptors.get(0));
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}
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else
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{
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Log.e("GattCallback", "Multiple descriptors found in weight characteristic, unhandled exception!");
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System.exit(-1);
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}
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}
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}
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}
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}
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final StringBuilder stringBuilder = new StringBuilder(data.length);
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for(byte byteChar : data) {
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stringBuilder.append(String.format("%02X ", byteChar));
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}
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@Override
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public void onCharacteristicChanged(BluetoothGatt gatt,
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BluetoothGattCharacteristic characteristic)
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{
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super.onCharacteristicChanged(gatt, characteristic);
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final byte[] data = characteristic.getValue();
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if (data != null && data.length > 0) {
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try {
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float weight = 0.0f;
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final byte ctrlByte = data[0];
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final boolean isWeightRemoved = isBitSet(ctrlByte, 7);
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final boolean isStabilized = isBitSet(ctrlByte, 5);
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final boolean isLBSUnit = isBitSet(ctrlByte, 0);
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final boolean isCattyUnit = isBitSet(ctrlByte, 4);
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/* Log.d("GattCallback", "IsWeightRemoved: " + isBitSet(ctrlByte, 7));
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Log.d("GattCallback", "6 LSB Unknown: " + isBitSet(ctrlByte, 6));
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Log.d("GattCallback", "IsStabilized: " + isBitSet(ctrlByte, 5));
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Log.d("GattCallback", "IsCattyOrKg: " + isBitSet(ctrlByte, 4));
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Log.d("GattCallback", "3 LSB Unknown: " + isBitSet(ctrlByte, 3));
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Log.d("GattCallback", "2 LSB Unknown: " + isBitSet(ctrlByte, 2));
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Log.d("GattCallback", "1 LSB Unknown: " + isBitSet(ctrlByte, 1));
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Log.d("GattCallback", "IsLBS: " + isBitSet(ctrlByte, 0));*/
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// Only if the value is stabilized and the weight is *not* removed, the date is valid
|
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if (isStabilized && !isWeightRemoved) {
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||||
|
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final int year = ((data[4] & 0xFF) << 8) | (data[3] & 0xFF);
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final int month = (int) data[5];
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final int day = (int) data[6];
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final int hours = (int) data[7];
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final int min = (int) data[8];
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final int sec = (int) data[9];
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if (isLBSUnit || isCattyUnit) {
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weight = (float) (((data[2] & 0xFF) << 8) | (data[1] & 0xFF)) / 100.0f;
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||||
} else {
|
||||
weight = (float) (((data[2] & 0xFF) << 8) | (data[1] & 0xFF)) / 200.0f;
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||||
}
|
||||
|
||||
String date_string = year + "/" + month + "/" + day + "/" + hours + "/" + min;
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||||
Date date_time = new SimpleDateFormat("yyyy/MM/dd/HH/mm").parse(date_string);
|
||||
|
||||
ScaleData scaleBtData = new ScaleData();
|
||||
|
||||
scaleBtData.weight = weight;
|
||||
scaleBtData.date_time = date_time;
|
||||
|
||||
callbackBtHandler.obtainMessage(BluetoothCommunication.BT_RETRIEVE_SCALE_DATA, scaleBtData).sendToTarget();
|
||||
}
|
||||
} catch (ParseException e) {
|
||||
callbackBtHandler.obtainMessage(BluetoothCommunication.BT_UNEXPECTED_ERROR, "Error while decoding bluetooth date string (" + e.getMessage() + ")").sendToTarget();
|
||||
}
|
||||
}
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
private boolean isBitSet(byte value, int bit){
|
||||
return (value & (1 << bit)) != 0;
|
||||
}
|
||||
Log.d("BluetoothMiScale", "Raw hex data: " + stringBuilder);
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user