The "AT 9.2.2.bin" is the default firmware of ESP-11 shield.
On the sample application, it allows you to connect on the esp8266 module via WiFi Network. The code will send an AT commands to configure as access point, getting the IP address, configure for multiple connections and turn on server on port 80. It can also send messages or data into your page.
Download Firmwares: https://www.e-gizmo.net/oc/kits%20documents/ESP-11%20wifi%20shield/Firmwares/Tags: ESP-11 SHIELD