Can not connect to built-in WiFi module in DM-3212 (CJMCU-3212).

I bought Arduino DM-3212 (CJMCU-3212 Virtual Keyboard Badusb) and try to use it built-in WIFI ESP-8266 module. I see it in WiFi networks as FaryLink_XXXXXX and can connect to it with CoolTermWin but can not send AT commands, it writes only "Establishing connection type…" continuously.
What I am doing wrong?