User Manual
! ! " !  
 Espressif Systems
ESP8266 
AT Command Examples
•
Device connect to server: 
 AT+CIPSTART="TCP", "192.168.101.110", 8080 // protocolserver IP & port 
 Response :OK  Linked 
•
Enable transparent transmission mode: 
 AT+CIPMODE=1 
 Response :OK 
•
Start sending data: 
 AT+CIPSEND 
 Response:  >          //From now on, data received from UART will be 
transparent transmitted to server. 
The network tool on PC will receive the data. 
•
Stop sending data: 
If received a packet of data that contains only “+++”, then the transparent transmission process will 
be stopped. Please wait at least 1 second before sending next AT command. 
Please be noted that if you input “+++” directly by typing, the “+++”, may not be recognised as three 
consecutive “+” because of the Prolonged time when typing. 
Note: 
The aim of ending “+++” is to exit transparent transmission and turn back to accept normal AT 
command, while TCP still remains connected. However, we can also use command “AT+CIPSEND” to 
turn back into transparent transmission. 
•
Disable UART - WiFi passthrough mode (transparent transmission) 
 AT+CIPMODE=0 
 Response : OK  
•
Delete TCP connection: 
 AT+CIPCLOSE 
 Response :CLOSED OK  
Espressif Systems Confidential   /   Friday, Oct 23, 201511 16










