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Adds compatibility with Renpho (QN Scale) scales that use the 2nd set of characteristics #1083

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Adds compatibility with Renpho (QN Scale) scales that use the 2nd set of characteristics #1083

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51 changes: 46 additions & 5 deletions android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothQNScale.java
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Original file line number Diff line number Diff line change
Expand Up @@ -53,6 +53,14 @@ public class BluetoothQNScale extends BluetoothCommunication {
private final UUID CUSTOM5_MEASUREMENT_CHARACTERISTIC = UUID.fromString("0000ffe5-0000-1000-8000-00805f9b34fb"); // write-only
/////////////

// 2nd Type Service and Characteristics (2nd Type doesn't need to indicate, and 4th characteristic is shared with 3rd.)
private final UUID WEIGHT_MEASUREMENT_SERVICE_ALTERNATIVE = UUID.fromString("0000fff0-0000-1000-8000-00805f9b34fb");
private final UUID CUSTOM1_MEASUREMENT_CHARACTERISTIC_ALTERNATIVE = UUID.fromString("0000fff1-0000-1000-8000-00805f9b34fb"); // notify, read-only
private final UUID CUSTOM3_MEASUREMENT_CHARACTERISTIC_ALTERNATIVE = UUID.fromString("0000fff2-0000-1000-8000-00805f9b34fb"); // write-only

private boolean useFirstType = true;


/** API
connectDevice(device, "userId", 170, 1, birthday, new new QNBleCallback(){
void onConnectStart(QNBleDevice bleDevice);
Expand Down Expand Up @@ -87,12 +95,29 @@ public String driverName() {
protected boolean onNextStep(int stepNr) {
switch (stepNr) {
case 0:
// Try writing bytes to 0xffe4 to check whether to use 1st or 2nd type
try {
long timestamp = new Date().getTime() / 1000;
timestamp -= SCALE_UNIX_TIMESTAMP_OFFSET;
byte[] date = new byte[4];
Converters.toInt32Le(date, 0, timestamp);
writeBytes(WEIGHT_MEASUREMENT_SERVICE, CUSTOM4_MEASUREMENT_CHARACTERISTIC, new byte[]{(byte) 0x02, date[0], date[1], date[2], date[3]});
} catch (NullPointerException e) {
useFirstType = false;
}

// set notification on for custom characteristic 1 (weight, time, and others)
setNotificationOn(WEIGHT_MEASUREMENT_SERVICE, CUSTOM1_MEASUREMENT_CHARACTERISTIC);
if (useFirstType) {
setNotificationOn(WEIGHT_MEASUREMENT_SERVICE, CUSTOM1_MEASUREMENT_CHARACTERISTIC);
} else {
setNotificationOn(WEIGHT_MEASUREMENT_SERVICE_ALTERNATIVE, CUSTOM1_MEASUREMENT_CHARACTERISTIC_ALTERNATIVE);
}
break;
case 1:
// set indication on for weight measurement
setIndicationOn(WEIGHT_MEASUREMENT_SERVICE, CUSTOM2_MEASUREMENT_CHARACTERISTIC);
if (useFirstType) {
setIndicationOn(WEIGHT_MEASUREMENT_SERVICE, CUSTOM2_MEASUREMENT_CHARACTERISTIC);
}
break;
case 2:
final ScaleUser scaleUser = OpenScale.getInstance().getSelectedScaleUser();
Expand All @@ -108,7 +133,12 @@ protected boolean onNextStep(int stepNr) {
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(WEIGHT_MEASUREMENT_SERVICE, CUSTOM3_MEASUREMENT_CHARACTERISTIC, ffe3magicBytes);

if (useFirstType) {
writeBytes(WEIGHT_MEASUREMENT_SERVICE, CUSTOM3_MEASUREMENT_CHARACTERISTIC, ffe3magicBytes);
} else {
writeBytes(WEIGHT_MEASUREMENT_SERVICE_ALTERNATIVE, CUSTOM3_MEASUREMENT_CHARACTERISTIC_ALTERNATIVE, ffe3magicBytes);
}
break;
case 3:
// send time magic number to receive weight data
Expand All @@ -117,7 +147,12 @@ protected boolean onNextStep(int stepNr) {
byte[] date = new byte[4];
Converters.toInt32Le(date, 0, timestamp);
byte[] timeMagicBytes = new byte[]{(byte) 0x02, date[0], date[1], date[2], date[3]};
writeBytes(WEIGHT_MEASUREMENT_SERVICE, CUSTOM4_MEASUREMENT_CHARACTERISTIC, timeMagicBytes);

if (useFirstType) {
writeBytes(WEIGHT_MEASUREMENT_SERVICE, CUSTOM4_MEASUREMENT_CHARACTERISTIC, timeMagicBytes);
} else {
writeBytes(WEIGHT_MEASUREMENT_SERVICE_ALTERNATIVE, CUSTOM3_MEASUREMENT_CHARACTERISTIC_ALTERNATIVE, timeMagicBytes);
}
break;
case 4:
sendMessage(R.string.info_step_on_scale, 0);
Expand All @@ -137,7 +172,7 @@ protected boolean onNextStep(int stepNr) {
public void onBluetoothNotify(UUID characteristic, byte[] value) {
final byte[] data = value;

if (characteristic.equals(CUSTOM1_MEASUREMENT_CHARACTERISTIC)) {
if (characteristic.equals(CUSTOM1_MEASUREMENT_CHARACTERISTIC) || characteristic.equals(CUSTOM1_MEASUREMENT_CHARACTERISTIC_ALTERNATIVE)) {
parseCustom1Data(data);
}
}
Expand All @@ -162,6 +197,12 @@ private void parseCustom1Data(byte[] data){
if (!this.hasReceived) {
this.hasReceived = true;
weightKg = decodeWeight(data[3], data[4]);

// Weight needs to be divided by 10 if 2nd type
if (!useFirstType) {
weightKg /= 10;
}

int weightByteOne = data[3] & 0xFF;
int weightByteTwo = data[4] & 0xFF;

Expand Down