Issue #194. Fix HLW8012 calibration

code/espurna/espurna.ino

@@ -158,6 +158,9 @@ void welcome() {
     #if EMON_SUPPORT
         DEBUG_MSG_P(PSTR(" EMON"));
     #endif
+    #if HLW8012_SUPPORT
+        DEBUG_MSG_P(PSTR(" HLW8012"));
+    #endif
     #if HOMEASSISTANT_SUPPORT
         DEBUG_MSG_P(PSTR(" HOMEASSISTANT"));
     #endif

code/espurna/hlw8012.ino

@@ -57,16 +57,17 @@ void hlw8012SaveCalibration() {
     setSetting("powPowerMult", hlw8012.getPowerMultiplier());
     setSetting("powCurrentMult", hlw8012.getCurrentMultiplier());
     setSetting("powVoltageMult", hlw8012.getVoltageMultiplier());
+    saveSettings();
 }
 
 void hlw8012RetrieveCalibration() {
     double value;
     value = getSetting("powPowerMult", 0).toFloat();
-    if (value > 0) hlw8012.setPowerMultiplier((int) value);
+    if (value > 0) hlw8012.setPowerMultiplier(value);
     value = getSetting("powCurrentMult", 0).toFloat();
-    if (value > 0) hlw8012.setCurrentMultiplier((int) value);
+    if (value > 0) hlw8012.setCurrentMultiplier(value);
     value = getSetting("powVoltageMult", 0).toFloat();
-    if (value > 0) hlw8012.setVoltageMultiplier((int) value);
+    if (value > 0) hlw8012.setVoltageMultiplier(value);
 }
 
 void hlw8012SetExpectedActivePower(unsigned int power) {

code/espurna/settings.ino

@@ -314,14 +314,6 @@ String getSetting(const String& key) {
     return getSetting(key, "");
 }
 
-bool setBoolSetting(const String& key, bool value, bool defaultValue) {
-    if (value == defaultValue) {
-        return delSetting(key);
-    } else {
-        return setSetting(key, value ? 1 : 0);
-    }
-}
-
 template<typename T> bool setSetting(const String& key, T value) {
     return Embedis::set(key, String(value));
 }

code/espurna/web.ino

@@ -246,13 +246,15 @@ void _wsParse(uint32_t client_id, uint8_t * payload, size_t length) {
                 }
 
                 if (key == "powExpectedReset") {
-                    hlw8012Reset();
-                    changed = true;
+                    if (value.toInt() == 1) {
+                        hlw8012Reset();
+                        changed = true;
+                    }
                 }
 
-            #endif
+                if (key.startsWith("pow")) continue;
 
-            if (key.startsWith("pow")) continue;
+            #endif
 
             #if DOMOTICZ_SUPPORT