Separate device name for alexa integration (#1727)

Allow defining custom device name for alexa integration, other than hostname.
Still uses hostname as a fallback.

code/espurna/alexa.ino

@@ -30,6 +30,7 @@ bool _alexaWebSocketOnReceive(const char * key, JsonVariant& value) {
 void _alexaWebSocketOnSend(JsonObject& root) {
     root["alexaVisible"] = 1;
     root["alexaEnabled"] = alexaEnabled();
+    root["alexaName"] = getSetting("alexaName");
 }
 
 void _alexaConfigure() {
@@ -84,9 +85,11 @@ void alexaSetup() {
     alexa.createServer(!WEB_SUPPORT);
     alexa.setPort(80);
 
-    // Uses hostname as base name for all devices
-    // TODO: use custom switch name when available
-    String hostname = getSetting("hostname");
+    // Use custom alexa hostname if defined, device hostname otherwise
+    String hostname = getSetting("alexaName", ALEXA_HOSTNAME);
+    if (hostname.length() == 0) {
+        hostname = getSetting("hostname");
+    }
 
     // Lights
     #if RELAY_PROVIDER == RELAY_PROVIDER_LIGHT

code/espurna/config/general.h

@@ -1227,6 +1227,11 @@
 #define ALEXA_ENABLED               1
 #endif
 
+#ifndef ALEXA_HOSTNAME
+#define ALEXA_HOSTNAME              ""
+#endif
+
+
 // -----------------------------------------------------------------------------
 // MQTT RF BRIDGE
 // -----------------------------------------------------------------------------

code/html/index.html

@@ -388,6 +388,17 @@
                                     <div class="pure-u-1 pure-u-lg-1-4"><input type="checkbox" name="alexaEnabled" /></div>
                                 </div>
 
+                                <div class="pure-g module module-alexa">
+                                    <label class="pure-u-1 pure-u-lg-1-4">Alexa device name</label>
+                                    <input name="alexaName" class="pure-u-1 pure-u-lg-1-4"  maxlength="31" type="text" action="reboot" tabindex="7" />
+                                    <div class="pure-u-0 pure-u-lg-1-2"></div>
+                                    <div class="pure-u-0 pure-u-lg-1-4"></div>
+                                    <div class="pure-u-1 pure-u-lg-3-4 hint">
+                                        This name will be used in Alexa integration.<br />
+                                    </div>
+                                </div>
+
+
                             </fieldset>
 
                         </div>