Instructions

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Espressif Systems
ESP8266
AT Instruction Set
15.
AT+CIPMODE – Set transfer mode
UART-WiFi passthrough mode (transparent transmission) can only be enabled in TCP single
connection mode or UDP of which remote IP and port won’t change (parameter <UDP mode> is 0
when using command "AT+CIPSTART" to create a UDP transmission) .!
During UART-WiFi passthrough transmission, if it is TCP connection and the TCP connection breaks,
ESP8266 will keep trying to reconnect until "+++" is input to quit from transmission. After sending the
"+++" token, please wait for at least 1 second before sending the next AT command.!
If it is a normal TCP transmission and TCP connection breaks, ESP8266 will prompt " [<link ID>, ]
CLOSED" , and will not attempt to reconnect. Users can call "AT+CIPSTART" to create a connection
again if it is needed.!
AT+ CIPMODE – Set transfer mode
Example
AT+CIPMODE=1
Command
AT+CIPMODE?
Response
+CIPMODE:<mode>
OK
Parameters
same as below
Command
AT+CIPMODE=<mode>
Response
OK
If already connected, returns
Link is builded
Parameters
<mode>
0 : normal mode
1 : UART-WiFi passthrough mode
Notes
Configuration changes will NOT be stored in flash.
Espressif Systems  / Friday, July 15, 201667 73