ESP8266 Community Forum

Hi.
Is it possible to add support for bigger flash sizes?
I have a bunch of 64Mbit flash chips here, and would like to try them.

Thanks
Uhrheber

Support in terms of what? I am running the ESP8266 Arduino port on my ESP-12, which has a 32Mbit flash. It works fine, but the boards.txt file limits the Arduino IDE to building a 512k firmware. I can't imagine a way I would realistically write an Arduino sketch that would even approach that 512k limit... But it would be nice to utilize the extra space in the SPI flash for data storage.

I've poked into the EEPROM library for the ESP8266 Arduino, and it looks like it should be possible to do something very similar to access all that extra flash space. I am planning to see if I can get a crude version of it working when I can find the time.

What I think would be really awesome is a port of SPIFFS which could use everything >512k as a nice place to write files. the LUA firmware has it already, so it's obviously possible -- not sure I have the smarts to integrate that with Arduino, unfortunately. But it would be awesome!

You should just need to modify the boards.txt file to change



to



or however big your flash is.


In my case, I added a new board type for the ESPD-12 model (ESP-12 with 32mbit flash) which has the larger size. You could easily add a new board type for your large flash boards if you can get the flash wired up.

Here's my boards.txt file: