ESP8266 Community Forum

Posted: **Sat Mar 14, 2020 2:43 pm**

Hi
i upgrade to sdk 3.0.2, it has a lot of AT functions, but when i reset or turn off/on the ESP8266 all data that i request via AT commands to save to FLASH (specially AT+CWJAP_DEF) wont save at all :cry:

my esp8266 is esp8266-01

what is the problem?

Posted: **Sun Mar 15, 2020 12:41 am**

you flashed the AT firmware which requires 2 MB to a 1 MB flash

Posted: **Sun Mar 15, 2020 2:44 am**

JurajA wrote:you flashed the AT firmware which requires 2 MB to a 1 MB flash

I think so, my esp detected info is attached for your idea, what I have to do?

Posted: **Sun Mar 15, 2020 9:32 am**

use an esp8266 module with at least 2 MB or AT firmware which can work on 1 MB flash.
1.6.x fits into 1 MB.
or here are 1.7 builds for different size including 1 MB and 512kB: https://github.com/loboris/ESP8266_AT_LoBo

ESP8266 Community Forum

Problem with save in FLASH with _DEF functions

Problem with save in FLASH with _DEF functions

Re: Problem with save in FLASH with _DEF functions

Re: Problem with save in FLASH with _DEF functions

Re: Problem with save in FLASH with _DEF functions