Instructions

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Espressif Systems
ESP8266
AT Instruction Set
5.
TCP/IP Related AT Commands
5.1.
Overview
TCP/IP
Command
Description
AT+ CIPSTATUS
Get connection status
AT+ CIPDOMAIN
DNS function
AT+CIPSTART
Establish TCP connection, UDP transmission or SSL connection
AT+CIPSSLSIZE
Set the size of SSL buffer
AT+CIPSEND
Send data
AT+CIPSENDEX
Send data, if <length> or "\0" is met, data will be sent
AT+CIPSENDBUF
Write data into TCP-send-buffer
AT+CIPBUFRESET
Reset segment ID count
AT+CIPBUFSTATUS
Check status of TCP-send-buffer
AT+CIPCHECKSEQ
Check if a specific segment is sent or not
AT+CIPCLOSE
Close TCP/UDP/SSL connection
AT+CIFSR
Get local IP address
AT+CIPMUX
Set multiple connections mode
AT+CIPSERVER
Configure as server
AT+CIPMODE
Set transmission mode
AT+SAVETRANSLINK
Save transparent transmission link to flash
AT+CIPSTO
Set timeout when ESP8266 runs as TCP server
AT+CIUPDATE
Upgrade firmware through network
AT+PING
Function PING
AT+CIPDINFO
Show remote IP and remote port with "+IPD"
Espressif Systems  / Friday, July 15, 201653 73