Below are some AT commands for ESP8266 and their outputs
AT OK
AT+GMR This will display firmware version and some other details
AT+CIPMUX=1 OK
AT+CWMODE=3 OK
AT+CWJAP="WIRELESS-ROUTER","password" [WIFI DISCONNECTED] (if it is already connected) WIFI CONNECTED WIFI GOT IP OK
AT+CIPSTART=4,"TCP","x.x.x.x",80 4,CONNECT OK
AT+CIPSEND=4,205 OK > [at this point HTTP request will be made, read below for details] Recv 205 bytes SEND OK +IPD,4,203:HTTP/1.1 200 OK Date: Sun, 14 Feb 2016 20:33:16 GMT Server: Apache/2.4.7 (Ubuntu) X-Powered-By: PHP/5.5.9-1ubuntu4.14 Content-Length: 15 Connection: close Content-Type: text/html led_1=0|led_2=14,CLOSED [The blue colored text above is what the server has sent in reply to the HTTP request]
AT+UART_CUR=2400,8,1,0,0 OK [This command work with AT ver 6.0 and SDK ver 1.5.2. The changes will be temporary and will be restored to default on resetting. Use ]
AT+UART_DEF=2400,8,1,0,0 [This will make the change permanent. In case things gets wrong then reflash] If AT+UART doesn't work then use AT+IPR
An extensive guide can be found here
https://github.com/espressif/ESP8266_AT/wiki/CWSAP
https://docs.espressif.com/projects/esp-at/en/latest/AT_Command_Set/Basic_AT_Commands.html
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