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Code Issues Releases Wiki Activity

Use help functions for converting bytes to measurement values

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Also use the datatime from the scale for the measurement.
This commit is contained in:
Erik Johansson
2018-04-07 20:41:51 +02:00
parent d132681b0d
commit 9e8625002a
1 changed files with 32 additions and 62 deletions
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94
android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothBeurerBF700_800.java
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@@ -26,14 +26,15 @@ import com.health.openscale.R;
import com.health.openscale.core.OpenScale;
import com.health.openscale.core.datatypes.ScaleMeasurement;
import com.health.openscale.core.datatypes.ScaleUser;
import com.health.openscale.core.utils.Converters;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Collections;
import java.util.Date;
import java.util.TreeSet;
import java.util.UUID;
@@ -360,7 +361,6 @@ public class BluetoothBeurerBF700_800 extends BluetoothCommunication {
boolean male = (data[11] & 0xF0) != 0;
byte activity = (byte) (data[11] & 0x0F);
Log.d(TAG, "Name " + name + " YY-MM-DD: " + year + " " + month + " " + day +
"Height: " + height + " Sex:" + (male ? "M" : "F") + "activity: " + activity);
@@ -370,7 +370,6 @@ public class BluetoothBeurerBF700_800 extends BluetoothCommunication {
(byte) 0x0, (byte) 0x0, (byte) 0x0, (byte) currentScaleUserId
});
return;
}
@@ -463,33 +462,21 @@ public class BluetoothBeurerBF700_800 extends BluetoothCommunication {
if ((data[0] & 0xFF) == startByte && (data[1] & 0xFF) == 0x58) {
Log.d(TAG, "Active measurement");
float weight = parseKiloGram(data, 3);
if ((data[2] & 0xFF) != 0x00) {
// little endian
float weight = ((float) (
((data[3] & 0xFF) << 8) + (data[4] & 0xFF)
)) * 50.0f / 1000.0f; // unit is 50g
// temporary value;
sendMessage(R.string.info_measuring, weight);
return;
}
// stabilized value
// little endian
float weight = ((float) (
((data[3] & 0xFF) << 8) + (data[4] & 0xFF)
)) * 50.0f / 1000.0f; // unit is 50g
Log.i(TAG, "Got weight: " + weight);
writeBytes(new byte[]{
(byte) startByte, (byte) 0xf1, (byte) (data[1] & 0xFF),
(byte) (data[2] & 0xFF), (byte) (data[3] & 0xFF),
});
return;
}
if ((data[0] & 0xFF) == startByte && (data[1] & 0xFF) == 0x59) {
@@ -519,9 +506,8 @@ public class BluetoothBeurerBF700_800 extends BluetoothCommunication {
if (current_item == max_items) {
// received all parts
ScaleMeasurement parsedData = null;
try {
parsedData = parseScaleData(receivedScaleData.toByteArray());
ScaleMeasurement parsedData = parseScaleData(receivedScaleData.toByteArray());
addScaleData(parsedData);
// Delete data
deleteScaleData();
@@ -549,60 +535,44 @@ public class BluetoothBeurerBF700_800 extends BluetoothCommunication {
});
}
private float parseKiloGram(byte[] data, int offset) {
// Unit is 50 g
return Converters.parseUnsignedInt16Be(data, offset) * 50.0f / 1000.0f;
}
private float parsePercent(byte[] data, int offset) {
// Unit is 0.1 %
return Converters.parseUnsignedInt16Be(data, offset) / 10.0f;
}
private ScaleMeasurement parseScaleData(byte[] data) throws ParseException {
if (data.length != 11 + 11)
if (data.length != 11 + 11) {
throw new ParseException("Parse scala data: unexpected length", 0);
}
long timestamp = ByteBuffer.wrap(data, 0, 4).getInt() * 1000L;
float weight = parseKiloGram(data, 4);
int impedance = Converters.parseUnsignedInt16Be(data, 6);
float fat = parsePercent(data, 8);
float water = parsePercent(data, 10);
float muscle = parsePercent(data, 12);
float bone = parseKiloGram(data, 14);
int bmr = Converters.parseUnsignedInt16Be(data, 16);
int amr = Converters.parseUnsignedInt16Be(data, 18);
float bmi = Converters.parseUnsignedInt16Be(data, 20) / 10.0f;
ScaleMeasurement receivedMeasurement = new ScaleMeasurement();
// Parse timestamp
long timestamp = ByteBuffer.wrap(data, 0, 4).getInt() * 1000L;
SimpleDateFormat sdf = new SimpleDateFormat("MMMM d, yyyy 'at' h:mm a");
String date = sdf.format(timestamp);
// little endian
float weight = ((float) (
((data[4] & 0xFF) << 8) + (data[5] & 0xFF)
)) * 50.0f / 1000.0f; // unit is 50g
receivedMeasurement.setDateTime(new Date(timestamp));
receivedMeasurement.setWeight(weight);
// Parse impedance level
int impedance = ((data[6] & 0xFF) << 8) + (data[7] & 0xFF);
// Parse fat
float fat = ((float) (
((data[8] & 0xFF) << 8) + (data[9] & 0xFF)
)) / 10.0f; // unit is 0.1%
receivedMeasurement.setFat(fat);
float water = ((float) (
((data[10] & 0xFF) << 8) + (data[11] & 0xFF)
)) / 10.0f; // unit is 0.1%
receivedMeasurement.setWater(water);
float muscle = ((float) (
((data[12] & 0xFF) << 8) + (data[13] & 0xFF)
)) / 10.0f; // unit is 0.1%
receivedMeasurement.setMuscle(muscle);
receivedMeasurement.setBone(bone);
float boneMass = ((float) (
((data[14] & 0xFF) << 8) + (data[15] & 0xFF)
)) * 50.0f / 1000.0f; // unit is 50g
receivedMeasurement.setBone(boneMass);
// basal metabolic rate
float bmr = ((float) (
((data[16] & 0xFF) << 8) + (data[17] & 0xFF)
)) / 10.0f;
// active metabolic rate
int amr = ((data[18] & 0xFF) << 8) + (data[19] & 0xFF);
float bmi = ((data[20] & 0xFF) << 8) + (data[21] & 0xFF);
Log.i(TAG, "Measurement: " + date + " Impedance: " + impedance + " Weight:" + weight +
Log.i(TAG, "Measurement: " + receivedMeasurement.getDateTime().toString() +
" Impedance: " + impedance + " Weight:" + weight +
" Fat: " + fat + " Water: " + water + " Muscle: " + muscle +
" BoneMass: " + boneMass + " BMR: " + bmr + " AMR: " + amr + " BMI: " + bmi);
" Bone: " + bone + " BMR: " + bmr + " AMR: " + amr + " BMI: " + bmi);
return receivedMeasurement;
}