This tutorial explains how to get ip address assigned to ESP8266? In DHCP configuration IP is assigned by WiFi Router. In most WiFi Router you can get IP address from WiFi router from its connected device status window. But WiFi router shows ip address only when there is data sent on network. If ESP is connected but did not sent any packet on network then WiFi router may not show ip address of your ESP. If it is connected then you will have to identify your ESP name. i.e. set using