ESP-01S with W25Q128FVSG

[cccp79]

Hi! I replaced the flash chip on the ESP-01S board with a W25Q128FVSG, and so far it has only been identified as 16M. Can you tell me how to redefine it to the maximum possible memory, like 32M or more?

[chromo23]

and so far it has only been identified as 16M

It's a 128MBit chip. So the maximum is 16MByte.

[TD-er]

I am not sure if the ESP8266 is capable of addressing flash > 16MB.
The SPI flash access is done at quite a low level and if there isn't support for larger chips in the SDK/ROM, then it will be too much work to add support for it on ESP8266 platforms.
Also the detected flash size is done using a bitshift based on the reported module type by the flash, so unless it is hard-coded to be limited to 16M, it should detect the true size as reported by the flash.

[cccp79]

Did I understand correctly that 128Mbit is 16M maximum possible value? Well, for this chip it is quite so good result. I'am happy!)

[Ath]

AFAICS, the ESP8266 doesn't support flash sizes > 16MB (128 MBit), see this Espressif documentation page

[TD-er]

Did I understand correctly that 128Mbit is 16M maximum possible value? Well, for this chip it is quite so good result. I'am happy!)

128 Mbit is (128 / 8 = ) 16 MByte.
So the detection is correct