fix: sportsplusrower (CARE rower) watt and calorie fixes (#4824)

Author: cagnulein

src/devices/sportsplusrower/sportsplusrower.cpp

@@ -136,15 +136,20 @@ void sportsplusrower::characteristicChanged(const QLowEnergyCharacteristic &char
     double kcal = 0;
     bool cadence_eval = false;
 
-    m_watt = ((newValue.at(10) >> 4) * 10) + (newValue.at(10) & 0x0F);
-    emit debug(QStringLiteral("Current watt: ") + QString::number(m_watt.value()));
-
     if(newValue.at(1) == 0x10) {
         Cadence = ((newValue.at(3) >> 4) * 10) + (newValue.at(3) & 0x0F);
         Speed = 0.37497622 * ((double)Cadence.value());
         emit debug(QStringLiteral("Current speed: ") + QString::number(Speed.value()));
     }
 
+    if (Speed.value() > 0) {
+        double paceSeconds = 1800.0 / Speed.value();
+        m_watt = rower::calculateWattsFromPace(paceSeconds);
+    } else {
+        m_watt = 0;
+    }
+    emit debug(QStringLiteral("Current watt: ") + QString::number(m_watt.value()));
+
     if (!firstCharChanged) {
         double elapsedMs = lastTimeCharChanged.msecsTo(now);
         Distance += ((Speed.value() / 3600.0) / (1000.0 / elapsedMs));
@@ -186,7 +191,7 @@ void sportsplusrower::characteristicChanged(const QLowEnergyCharacteristic &char
     }
 
     Resistance = requestResistance;
-    KCal = kcal;
+    KCal += kcal;
     if (settings.value(QZSettings::cadence_sensor_name, QZSettings::default_cadence_sensor_name)
             .toString()
             .startsWith(QStringLiteral("Disabled"))) {