Build-time default value for hostname

code/espurna/config/defaults.h

@@ -399,6 +399,11 @@
 // General
 // -----------------------------------------------------------------------------
 
+// Default hostname will be ESPURNA_XXXXXX, where XXXXXX is last 3 octets of chipID
+#ifndef HOSTNAME
+#define HOSTNAME ""
+#endif
+
 // Needed for ESP8285 boards under Windows using PlatformIO (?)
 #ifndef BUTTON_PUSHBUTTON
 #define BUTTON_PUSHBUTTON   0

code/espurna/espurna.ino

@@ -50,7 +50,7 @@ void setup() {
 
     // Hostname & board name initialization
     if (getSetting("hostname").length() == 0) {
-        setSetting("hostname", getIdentifier());
+        setDefaultHostname();
     }
     setBoardName();
 

code/espurna/utils.ino

@@ -15,6 +15,14 @@ String getIdentifier() {
     return String(buffer);
 }
 
+void setDefaultHostname() {
+    if (strlen(HOSTNAME) > 0) {
+        setSetting("hostname", HOSTNAME);
+    } else {
+        setSetting("hostname", getIdentifier());
+    }
+}
+
 void setBoardName() {
     #ifndef ESPURNA_CORE
         setSetting("boardName", DEVICE_NAME);