Added ability to specify optional sketch version number.

Specify with homeSpan.setSketchVersion(char *).
Read back with homeSpan.getSketchVersion().

Also, MDNS now broadcasts three new fields:

hspn = HomeSpan Version
sketch = Sketch Version
ota = "yes" if OTA enabled, else "no"

These are all optional to HAP but useful if trying to keep track of version updates when using OTA and Serial Monitor is not available.

src/HomeSpan.cpp

@@ -71,6 +71,8 @@ void Span::begin(Category catID, const char *displayName, const char *hostNameBa
   Serial.print(statusPin);  
   Serial.print("\nDevice Control:   Pin ");
   Serial.print(controlPin);
+  Serial.print("\nSketch Version:   ");
+  Serial.print(getSketchVersion());  
   Serial.print("\nHomeSpan Version: ");
   Serial.print(HOMESPAN_VERSION);
   Serial.print("\nESP-IDF Version:  ");
@@ -422,6 +424,10 @@ void Span::checkConnect(){
   else
     mdns_service_txt_item_set("_hap","_tcp","sf","0");           // set Status Flag = 0
 
+  mdns_service_txt_item_set("_hap","_tcp","hspn",HOMESPAN_VERSION);           // HomeSpan Version Number (info only - NOT used by HAP)
+  mdns_service_txt_item_set("_hap","_tcp","sketch",sketchVersion);            // Sketch Version (info only - NOT used by HAP)
+  mdns_service_txt_item_set("_hap","_tcp","ota",otaEnabled?"yes":"no");       // OTA Enabled (info only - NOT used by HAP)
+
   uint8_t hashInput[22];
   uint8_t hashOutput[64];
   char setupHash[9];

src/HomeSpan.h

@@ -87,6 +87,7 @@ struct Span{
   String configLog;                             // log of configuration process, including any errors
   boolean isBridge=true;                        // flag indicating whether device is configured as a bridge (i.e. first Accessory contains nothing but AccessoryInformation and HAPProtocolInformation)
   HapQR qrCode;                                 // optional QR Code to use for pairing
+  const char *sketchVersion="n/a";              // version of the sketch
 
   boolean connected=false;                      // WiFi connection status
   unsigned long waitTime=60000;                 // time to wait (in milliseconds) between WiFi connection attempts
@@ -153,6 +154,8 @@ struct Span{
   void setPortNum(uint16_t port){tcpPortNum=port;}                        // sets the TCP port number to use for communications between HomeKit and HomeSpan
   void setQRID(const char *id);                                           // sets the Setup ID for optional pairing with a QR Code
   void enableOTA(){otaEnabled=true;}                                      // enables Over-the-Air updates
+  void setSketchVersion(const char *sVer){sketchVersion=sVer;}            // set optional sketch version number
+  const char *getSketchVersion(){return sketchVersion;}                   // get sketch version number
 };
 
 ///////////////////////////////

src/src.ino

@@ -15,6 +15,7 @@ void setup() {
   homeSpan.setMaxConnections(16);
 //  homeSpan.setQRID("One1");
   homeSpan.enableOTA();
+  homeSpan.setSketchVersion("Test 1.2.3");
 
   homeSpan.begin(Category::Lighting,"HomeSpanTest");