Hardware compatibility list

[karlkloss]

I judged that from the fact, that I could flash and run the OPI Annex version, and that the datasheet says the internal RAM is OPI.

So what does the OPI flag in the firmware name really stand for? Only RAM is OPI, Only Flash is OPI or both?

Is there a foolproof method to find out what type of memory is used?

[cicciocb]

As my father used to say, a picture is worth a thousand words. (in this case 2 images )

image.png

image.png

[karlkloss]

Ah, that explains it.
So there's no opi_opi version, because there are no boards with opi Flash?

Seems that OPI Flash support is still experimental, and not easy to implement:
https://docs.espressif.com/projects/esp ... sh-support

Code: [Local Link Removed for Guests]

Different octal flash has different configurations and different commands. 

And you'd have to compile for the specific type of Flash chip.

[cicciocb]

Ah, that explains it.
So there's no opi_opi version, because there are no boards with opi Flash?

This is not true, there are some opi_opi version I published in the past but I stopped to publish because I'm probably the only one that owns one of these modules (with 32MB of flash and 8MB of PSRAM) details here

image.png

And you'd have to compile for the specific type of Flash chip.

This is true, each version requires a different compilation, each combination of flash and psram requires a different compilation

[cicciocb]

Ah, that explains it.
So there's no opi_opi version, because there are no boards with opi Flash?

This is not true, there are some opi_opi version I published in the past but I stopped to publish because I'm probably the only one that owns one of these modules (with 32MB of flash and 8MB of PSRAM)

image.png

And you'd have to compile for the specific type of Flash chip.

This is true, each version requires a different compilation, each combination of flash and psram requires a different compilation

[karlkloss]

I'm probably the only one that owns one of these modules (with 32MB of flash and 8MB of PSRAM)

I thought of buying one, but so far I didn't reach the limit of the 16MB modules.

[cicciocb]

I'm probably the only one that owns one of these modules (with 32MB of flash and 8MB of PSRAM)

I thought of buying one, but so far I didn't reach the limit of the 16MB modules.

No, is not a good idea, 16 MB is more than enough and the "standard" is practically QIO + OPI 16 + 8.
However the new modules arriving are QIO + OPI 16 + 16.

[karlkloss]

Interesting find in my drawer:

grafik.png

Both boards are ESP32-S3 with 16MB Flash and 8MB RAM.
The upper one has a standard S3 and both external RAM and Flash and needs a QIO QSPI firmware.
The lower one has a S3-R8 (internal RAM) and an external Flash, and therefore needs a QIO OPI firmware.

BTW: There are more and more ESP32-S3 boards with camera appearing. Do you have plans to support them?

[cicciocb]

No, the S3-camera is not in my roadmap

[karlkloss]

Sorry for not already having updated the RAM/Flash configuration, I was sick for a few days and have a lot to do at work and privately at the moment.