Added the TEST value as a mailbox event to later implement a test feature to check for RF range for example

src/app/app.ino

@@ -511,6 +511,9 @@ HttpClient::HttpQueryStatus insertIntoDB(MailboxDataPacket *p)
     case MAILBOX_COLLECTED:
       mailboxPostData("event")->setString("COLLECTED");
       break;
+    case MAILBOX_TEST:
+      mailboxPostData("event")->setString("TEST");
+      break;
     default:
       break;
   }
@@ -553,6 +556,9 @@ void debugStruct(MailboxDataPacket *p)
     case MAILBOX_COLLECTED:
       Serial.println("COLLECTED");
       break;
+    case MAILBOX_TEST:
+      Serial.println("TEST");
+      break;
     default:
       break;
   }

src/app/definition.h

@@ -28,6 +28,7 @@ typedef enum
   MAILBOX_LETTER = 0,
   MAILBOX_PACKAGE,
   MAILBOX_COLLECTED,
+  MAILBOX_TEST,
   MAILBOX_UNKNOWN,
 } MAILBOX_EVENT_e;