Added 'V' command to CLI

This command erases all values of saved Characteristics

src/HomeSpan.cpp

@@ -784,6 +784,14 @@ void Span::processSerialCommand(const char *c){
     }
     break;
 
+    case 'V': {
+      
+      nvs_erase_all(charNVS);
+      nvs_commit(charNVS);      
+      Serial.print("\n*** Values for all saved Characteristics erased!\n\n");
+    }
+    break;
+
     case 'H': {
       
       statusLED.off();
@@ -893,6 +901,7 @@ void Span::processSerialCommand(const char *c){
       Serial.print("  O - change the OTA password\n");
       Serial.print("  A - start the HomeSpan Setup Access Point\n");      
       Serial.print("\n");      
+      Serial.print("  V - delete value settings for all saved Characteristics\n");
       Serial.print("  U - unpair device by deleting all Controller data\n");
       Serial.print("  H - delete HomeKit Device ID as well as all Controller data and restart\n");      
       Serial.print("\n");      

src/HomeSpan.h

@@ -380,6 +380,8 @@ struct SpanCharacteristic{
     
   template <typename T, typename A=boolean, typename B=boolean> void init(T val, boolean nvsStore, A min=0, B max=1){
 
+    int nvsFlag=0;
+
     uvSet(value,val);
     uvSet(newValue,val);
     uvSet(minValue,min);
@@ -396,10 +398,12 @@ struct SpanCharacteristic{
       if(!nvs_get_blob(homeSpan.charNVS,nvsKey,NULL,&len)){
         nvs_get_blob(homeSpan.charNVS,nvsKey,&value,&len);
         newValue=value;
+        nvsFlag=2;
       }
       else {
         nvs_set_blob(homeSpan.charNVS,nvsKey,&value,sizeof(UVal));       // store data
         nvs_commit(homeSpan.charNVS);                                    // commit to NVS  
+        nvsFlag=1;
       }
     }
   
@@ -407,8 +411,10 @@ struct SpanCharacteristic{
     if(format!=STRING && format!=BOOL)
       homeSpan.configLog+= "  Range=[" + String(uvPrint(minValue)) + "," + String(uvPrint(maxValue)) + "]";
 
-    if(nvsStore)
+    if(nvsFlag==2)
       homeSpan.configLog+=" (restored)";
+    else if(nvsFlag==1)
+      homeSpan.configLog+=" (storing)";
   
     boolean valid=false;