Use int debug level

examples/esp32/device-dashboard/main/main.c

@@ -27,7 +27,7 @@ void app_main(void) {
 
   // Connected to WiFi, now start HTTP server
   struct mg_mgr mgr;
-  mg_log_set("3");
+  mg_log_set(MG_LL_DEBUG);  // Set log level
   mg_mgr_init(&mgr);
   MG_INFO(("Mongoose v%s on %s", MG_VERSION, s_listening_url));
   mg_http_listen(&mgr, s_listening_url, device_dashboard_fn, &mgr);