Created method setPairingCode(const char *s)

Allows for programmatic creation of Pairing Setup Code.  Not recommended, but added for a convenience - should use 'S' from CLI instead.

src/HAP.cpp

@@ -52,6 +52,10 @@ void HAPClient::init(){
     otaPwdHash.getChars(homeSpan.otaPwd);
   }
 
+  if(strlen(homeSpan.pairingCodeCommand)){                          // load verification setup code if provided
+    homeSpan.processSerialCommand(homeSpan.pairingCodeCommand);     // if load failed due to invalid code, the logic below still runs and will pick up previous code or use the default one
+  } 
+
   struct {                                      // temporary structure to hold SRP verification code and salt stored in NVS
     uint8_t salt[16];
     uint8_t verifyCode[384];

src/HomeSpan.cpp

@@ -721,11 +721,11 @@ void Span::processSerialCommand(const char *c){
       sscanf(c+1," %9[0-9]",setupCode);
       
       if(strlen(setupCode)!=8){
-        Serial.print("\n*** Invalid request to change Setup Code.  Code must be exactly 8 digits.\n");
+        Serial.print("\n*** Invalid request to change Setup Code.  Code must be exactly 8 digits.\n\n");
       } else
       
       if(!network.allowedCode(setupCode)){
-        Serial.print("\n*** Invalid request to change Setup Code.  Code too simple.\n");
+        Serial.print("\n*** Invalid request to change Setup Code.  Code too simple.\n\n");
       } else {
         
         sprintf(buf,"\n\nGenerating SRP verification data for new Setup Code: %.3s-%.2s-%.3s ... ",setupCode,setupCode+3,setupCode+5);

src/HomeSpan.h

@@ -112,6 +112,7 @@ struct Span{
   const char *sketchVersion="n/a";              // version of the sketch
   nvs_handle charNVS;                           // handle for non-volatile-storage of Characteristics data
   nvs_handle wifiNVS=0;                         // handle for non-volatile-storage of WiFi data
+  char pairingCodeCommand[12]="";               // user-specified Pairing Code - only needed if Pairing Setup Code is specified in sketch using setPairingCode()
 
   boolean connected=false;                      // WiFi connection status
   unsigned long waitTime=60000;                 // time to wait (in milliseconds) between WiFi connection attempts
@@ -188,6 +189,8 @@ struct Span{
   void setWifiCallback(void (*f)()){wifiCallback=f;}                      // sets an optional user-defined function to call once WiFi connectivity is established
   void setApFunction(void (*f)()){apFunction=f;}                          // sets an optional user-defined function to call when activating the WiFi Access Point
   
+  void setPairingCode(const char *s){sprintf(pairingCodeCommand,"S %9s",s);}   // sets the Pairing Code - use is NOT recommended.  Use 'S' from CLI instead
+  
   void enableAutoStartAP(){autoStartAPEnabled=true;}                      // enables auto start-up of Access Point when WiFi Credentials not found
   void setWifiCredentials(const char *ssid, const char *pwd);             // sets WiFi Credentials
 };