How do you call esp_wifi_set_country inside Arduino IDE?

I call now WiFi.setSleep(false);

and inside the loop I check

if (WiFi.status() != WL_CONNECTED) {

in this case, I reconnect. It works for a few days now but sometimes it is not responding. It seems that it needs time to reconnect. So it ...

Hello,
I have the problem that ESP32 Wifi server is working OK but after some hours or even minutes, the WIFI disconnects. I am using ESP32 DEVKIT V1 but I have the same problem with other boards. I have tried more than one board and different WIFI routers ( home, office).
To program it I am using ...