Data Sheet

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1. Overview
All the files in folder at should be copied to the folder app in ESP8266_NONOS_SDK if users need to
compile the AT firmware.
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For details please refer to ESP8266 Getting Started Guide.
1.2. Downloading AT Firmware into the Flash
Please refer to ESP8266_NONOS_SDK/bin/at/readme.txt for instructions on how to download AT
firmware into flash. Please use Espressif’s official Flash Download Tools to download the firmware.
Make sure you select the corresponding flash size.
Espressif’s official Flash Download Tools:"
http://espressif.com/en/support/download/other-tools?keys=&field_type_tid%5B%5D=14.
1.2.1. 4 Mbit Flash
With the release of ESP8266_NONOS_SDK_V2.0.0, AT_V1.3, AT firmware can use 4-Mbit flash but
does not supports FOTA (upgrade AT firmware through Wi-Fi) function.
1.2.2. 8 Mbit Flash
If the flash size is 8 Mbit 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: 8 Mbit.
BIN
Address
Description
blank.bin
0x78000
Initializes the RF_CAL parameter area.
esp_init_data_default.bin
0x7C000
Stores the default RF parameter values; the BIN 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
Initializes the flash user parameter area; for more details please
see Appendix.
blank.bin
0x7E000
Initializes Flash system parameter area; for more details please
see Appendix.
eagle.flash.bin
0x00000
In /bin/at/noboot.
eagle.irom0text.bin
0x10000
In /bin/at/noboot.
Espressif
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2017.05