--- a/main/co2meter.c	Sat Jun 13 23:16:50 2020 +0200
+++ b/main/co2meter.c	Sun Jun 14 14:53:06 2020 +0200
@@ -31,6 +31,9 @@
 extern uint32_t				err_connect;			///< Connect error counter
 
 
+/**
+ * @brief Main program entry
+ */
 void app_main()
 {
     esp_err_t           ret;