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Fix force QN-Scale to KG (#429)

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added unit support for QN scale
This commit is contained in:
srwareham
2019-03-08 08:37:21 -05:00
committed by OliE
parent ecc8f2fd01
commit a66658c829
2 changed files with 21 additions and 2 deletions
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8
android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothCommunication.java
View File

@@ -426,6 +426,14 @@ public abstract class BluetoothCommunication {
return checksum;
}
protected byte sumChecksum(byte[] data, int offset, int length) {
byte checksum = 0;
for (int i = offset; i < offset + length; ++i) {
checksum += data[i];
}
return checksum;
}
/**
* Test in a byte if a bit is set (1) or not (0)
*

15
android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothQNScale.java
View File

@@ -95,8 +95,19 @@ public class BluetoothQNScale extends BluetoothCommunication {
setIndicationOn(CUSTOM2_MEASUREMENT_CHARACTERISTIC);
break;
case 2:
// write magicnumber 0x130915011000000042 to 0xffe3
byte[] ffe3magicBytes = new byte[]{(byte) 0x13, (byte) 0x09, (byte) 0x15, (byte) 0x01, (byte) 0x10, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x42};
final ScaleUser scaleUser = OpenScale.getInstance().getSelectedScaleUser();
final Converters.WeightUnit scaleUserWeightUnit = scaleUser.getScaleUnit();
// Value of 0x01 = KG. 0x02 = LB. Requests with stones unit are sent as LB, with post-processing in vendor app.
byte weightUnitByte = (byte) 0x01;
// Default weight unit KG. If user config set to LB or ST, scale will show LB units, consistent with vendor app
if (scaleUserWeightUnit == Converters.WeightUnit.LB || scaleUserWeightUnit == Converters.WeightUnit.ST){
weightUnitByte = (byte) 0x02;
}
// write magicnumber 0x130915[WEIGHT_BYTE]10000000[CHECK_SUM] to 0xffe3
// 0x01 weight byte = KG. 0x02 weight byte = LB.
byte[] ffe3magicBytes = new byte[]{(byte) 0x13, (byte) 0x09, (byte) 0x15, weightUnitByte, (byte) 0x10, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00};
// Set last byte to be checksum
ffe3magicBytes[ffe3magicBytes.length -1] = sumChecksum(ffe3magicBytes, 0, ffe3magicBytes.length - 1);
writeBytes(CUSTOM3_MEASUREMENT_CHARACTERISTIC, ffe3magicBytes);
break;
case 3: