Added new method homeSpan.setHostNameSuffix()

Allows user to replace the 6-byte AccessoryID "suffix" in the hostName with a custom suffix, included a blank string.  To do: Add to documentation.

src/HomeSpan.cpp

@@ -363,9 +363,19 @@ void Span::checkConnect(){
 
   // create broadcaset name from server base name plus accessory ID (without ':')
 
-  int nChars=snprintf(NULL,0,"%s-%.2s%.2s%.2s%.2s%.2s%.2s",hostNameBase,id,id+3,id+6,id+9,id+12,id+15);       
+  int nChars;
+
+  if(!hostNameSuffix)
+    nChars=snprintf(NULL,0,"%s-%.2s%.2s%.2s%.2s%.2s%.2s",hostNameBase,id,id+3,id+6,id+9,id+12,id+15);
+  else
+    nChars=snprintf(NULL,0,"%s%s",hostNameBase,hostNameSuffix);
+    
   char hostName[nChars+1];
-  sprintf(hostName,"%s-%.2s%.2s%.2s%.2s%.2s%.2s",hostNameBase,id,id+3,id+6,id+9,id+12,id+15);
+  
+  if(!hostNameSuffix)
+    sprintf(hostName,"%s-%.2s%.2s%.2s%.2s%.2s%.2s",hostNameBase,id,id+3,id+6,id+9,id+12,id+15);
+  else
+    sprintf(hostName,"%s%s",hostNameBase,hostNameSuffix);
 
   Serial.print("\nStarting MDNS...\n");
   Serial.print("Broadcasting as: ");

src/HomeSpan.h

@@ -75,7 +75,8 @@ struct SpanConfig {
 struct Span{
 
   const char *displayName;                      // display name for this device - broadcast as part of Bonjour MDNS
-  const char *hostNameBase;                     // base of host name of this device - full host name broadcast by Bonjour MDNS will have 6-byte accessoryID as well as '.local' automatically appended
+  const char *hostNameBase;                     // base of hostName of this device - full host name broadcast by Bonjour MDNS will have 6-byte accessoryID as well as '.local' automatically appended
+  const char *hostNameSuffix=NULL;              // optional "suffix" of hostName of this device.  If specified, will be used as the hostName suffix instead of the 6-byte accessoryID
   char *hostName;                               // full host name of this device - constructed from hostNameBase and 6-byte AccessoryID
   const char *modelName;                        // model name of this device - broadcast as Bonjour field "md" 
   char category[3]="";                          // category ID of primary accessory - broadcast as Bonjour field "ci" (HAP Section 13)
@@ -141,6 +142,7 @@ struct Span{
   void setCommandTimeout(uint16_t nSec){comModeLife=nSec*1000;}           // sets Command Mode Timeout (seconds)
   void setLogLevel(uint8_t level){logLevel=level;}                        // sets Log Level for log messages (0=baseline, 1=intermediate, 2=all)
   void setMaxConnections(uint8_t nCon){maxConnections=nCon;}              // sets maximum number of simultaneous HAP connections (HAP requires devices support at least 8)
+  void setHostNameSuffix(const char *suffix){hostNameSuffix=suffix;}      // sets the hostName suffix to be used instead of the 6-byte AccessoryID 
 };
 
 ///////////////////////////////

src/src.ino

@@ -10,6 +10,8 @@ void setup() {
  
   homeSpan.setLogLevel(2);
 
+  homeSpan.setHostNameSuffix("");
+
   homeSpan.begin(Category::Lighting,"HomeSpanTest");
 
   new SpanAccessory();                                  // Begin by creating a new Accessory using SpanAccessory(), which takes no arguments