Instructions

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Espressif Systems
ESP8266
AT Instruction Set
6.
Appendix
ESP8266 AT commands below will save configuration parameters into flash:!
!
•
Only if the configuration changes, the AT firmware will write the new configuration into flash.
Therefore, users need not be concerned about wearing out the flash on repeated application of
commands that set the same default configurations over and over again.!
•
To 512KB+512KB Flash Map:!
user parameter area is 0x7C000 ~ 0x80000, 16KB;!
•
To 1024KB+1024KB Flash Map:!
user parameter area is 0xFC000 ~ 0x100000, 16KB;!
•
System parameter area is always the last 16KB of Flash.&
AT Command
Example
Save into flash user parameter area
AT+UART_DEF
AT+UART_DEF=115200, 8, 1, 0, 3
AT+CWDHCP_DEF
AT+CWDHCP_DEF=1, 1
AT+CIPSTAMAC_DEF
AT+CIPSTAMAC_DEF="18:fe:35:98:d3:7b"
AT+CIPAPMAC_DEF
AT+CIPAPMAC_DEF="1a:fe:36:97:d5:7b"
AT+CIPSTA_DEF
AT+CIPSTA_DEF="192.168.6.100"
AT+CIPAP_DEF
AT+CIPAP_DEF="192.168.5.1"
AT+CWDHCPS_DEF
AT+CWDHCPS_DEF=1, 3, "192.168.4.10", "192.168.4.15"
AT+SAVETRANSLINK
AT+SAVETRANSLINK =1, "192.168.6.10", 1001
Save into flash system parameter area
AT+CWMODE_DEF
AT+CWMODE_DEF=3
AT+CWJAP_DEF
AT+CWJAP_DEF="abc", "0123456789"
AT+CWSAP_DEF
AT+CWSAP_DEF="ESP8266", "12345678", 5, 3
AT+CWAUTOCONN
AT+CWAUTOCONN=1
Espressif Systems  / Friday, July 15, 201672 73