@pbecchi and @argjoe
What ESP8266ping.h you are using? I can’t find <Arduino-Ping-master\ESP8266ping.h> library declared in EtherCardW5100.h I’ve downloaded this one https://github.com/dancol90/ESP8266Ping and looks like this library is causing some problems.
I’m trying to accomplish same goal as argjoe to have minimal HW system as posible to be controlled over html or/and OpenHAB. And please be patient whit me 🙂 I’m beginner…