diff --git a/firmware/firmware.ino b/firmware/firmware.ino
index 9dc6c7b..ebb2db9 100644
--- a/firmware/firmware.ino
+++ b/firmware/firmware.ino
@@ -68,9 +68,11 @@ void setup()
   wifiManager.setTimeout(WIFI_CONFIG_PORTAL_TIMEOUT_S);
 
 #ifndef SLEEP_IF_NO_WLAN_CONNECTION
+  // do not sleep, repeat connecting
   while
 #endif
 #ifdef def SLEEP_IF_NO_WLAN_CONNECTION
+  // stop connecting after fail to connect to wifi
   if
 #endif
         (!wifiManager.autoConnect(wifiName.c_str(), "DEADBEEF"))
@@ -82,6 +84,7 @@ void setup()
     delay(100);
 #endif
 #ifndef SLEEP_IF_NO_WLAN_CONNECTION
+    // sleep a few seconds and go on trying to connect
     delay(5000);
 #endif
   }