ESP8266 Community Forum

- Thu May 07, 2015 9:48 pm #16851 Word back from Espressif on those early sample WROOM modules.

"i think the reason is WROOM-01 (the early versions of it), used DIO flash and not QIO flash."

What is difference between DIO and QIO flash? I have not heard of that before. So I suspect if you replace the flash chip on those early models they will work the way you expect them too.

Where I get my modules

- Thu May 07, 2015 9:53 pm #16852 The module AI-THINKER submitted to the FCC had the required sticker on it showing the FCC ID. None of anyone of the ones I've seen have that sticker. And since they filed under "Shenzhen Anxinke technology co., LTD" instead of AI-THINKER there was no way to locate their paperwork.

Where I get my modules

- Thu May 07, 2015 9:53 pm #16853 The module AI-THINKER submitted to the FCC had the required sticker on it showing the FCC ID. None of anyone of the ones I've seen have that sticker. And since they filed under "Shenzhen Anxinke technology co., LTD" instead of AI-THINKER there was no way to locate their paperwork.

Where I get my modules

- Sat May 09, 2015 12:14 pm #17007

Word back from Espressif on those early sample WROOM modules.

"i think the reason is WROOM-01 (the early versions of it), used DIO flash and not QIO flash."

What is difference between DIO and QIO flash? I have not heard of that before. So I suspect if you replace the flash chip on those early models they will work the way you expect them too.

Moin,

I think its a communication mode d for double someting q for quad.
I think i read that the esp supports different communication modes for flash modules.
If that needs to be programmed it may explain problems with firmwares that are used on qio flas modules
before.
If i remember correctly i saw sio/dio/qio in the data sheet of some flash chips. Maybe just lookup
the one for some.

Just some vague thoughts.

Cal

Get your modules here:

https://www.banggood.com/custlink/KvGGhGF4wG