Data Sheet

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5. TCP/IP-Related AT Commands
5.2.14. AT+CIPSERVER—Deletes/Creates TCP Server
5.2.15. AT+CIPMODE—Sets Transmission Mode
Notes
• The default mode is single connection mode.
• Multiple connections can only be set when transparent transmission is disabled (AT+CIPMODE=0).
• This mode can only be changed after all connections are disconnected.
• If the TCP server is running, it must be deleted (AT+CIPSERVER=0) before the single connection mode is
activated.
Example
AT+CIPMUX=1
Set Command
AT+CIPSERVER=<mode>[,<port>]
Response
OK
Parameters
• <mode>:
‣ 0: deletes server.
‣ 1: creates server.
• <port>: port number; 333 by default.
Notes
• A TCP server can only be created when multiple connections are activated (AT+CIPMUX=1).
• A server monitor will automatically be created when the TCP server is created.
• When a client is connected to the server, it will take up one connection and be assigned an ID.
Example
AT+CIPMUX=1
AT+CIPSERVER=1,1001
Commands
Query Command:
AT+CIPMODE?
Function: to obtain information about transmission
mode.
Set Command:
AT+CIPMODE=<mode>
Function: to set the transmission mode.
Response
+CIPMODE:<mode>
OK
OK
Parameters
<mode>:
‣ 0: normal transmission mode.
‣ 1: UART-Wi-Fi passthrough mode (transparent transmission), which can only be enabled in TCP
single connection mode or in UDP mode when the remote IP and port do not change.
Notes
•
The configuration changes will NOT be saved in flash.
•
During the UART-Wi-Fi passthrough transmission, if the TCP connection breaks, ESP8266 will keep
trying to reconnect until +++ is input to exit the transmission. If it is a normal TCP transmission and the
TCP connection breaks, ESP8266 will give a prompt and will not attempt to reconnect.
Example
AT+CIPMODE=1
Espressif
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2017.05