Instructions

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Espressif Systems
ESP8266
AT Instruction Set
Please refer to ESP8266_Getting_Started_Guide for instructions on compiling applications.
1.2.
Downloading AT firmware into Flash
Refer to ESP8266_NONOS_SDK\bin\at\readme.txt for instructions on how to download AT firmware
into Flash. Please use Espressif official Flash download tool and select corresponding Flash size to
download the firmware. !
Espressif official Flash download tool: http://bbs.espressif.com/viewtopic.php?f=5&t=433!
1.
4Mbit Flash
With the release of ESP8266_NONOS_SDK_V2.0.0, AT_V1.3, AT firmware can use 4Mbit Flash without
FOTA (upgrade AT firmware through Wi-Fi) function.!
2.
8Mbit Flash
If the Flash size is 8Mbit or larger, users can use boot mode which supports AT firmware upgrade
feature through Wi-Fi by command "AT+CIUPDATE". Use Espressif Flash download tool and select
Flash size: 8Mbit.!
bin
Address
Description
blank.bin
0x78000
Initialize RF_CAL parameter area
esp_init_data_default.bin
0x7C000
Stores default RF parameter values, has to be downloaded into
flash at least once.
If the RF_CAL parameter area is initialized, this bin has to be
downloaded too.
blank.bin
0x7A000
Initialize Flash user parameter area, more details in Appendix.
blank.bin
0x7E000
Initialize Flash system parameter area, more details in
Appendix.
eagle.flash.bin
0x00000
In \bin\at\noboot
eagle.irom0text.bin
0x10000
In \bin\at\noboot
Espressif Systems / Friday, July 15, 20166 73