esp_nn.h missing (at least for Arduino library builds)

[ShawnHymel]

Reported from a user: https://forum.edgeimpulse.com/t/i-am-gettting-error-whiile-compiling-arduino-code/5382

Looks like somewhere, esp_nn.h does not get included in the build (at least for Arduino).

[ShawnHymel]

Tagging @AIWintermuteAI, as this looks like an ESP32 thing.

[AIWintermuteAI]

Yes and it only affects ESP32 Arduino builds, which we do not support at the moment :)
I'm investigating a possible workaround for users to disable ESP NN for Arduino until we add the support.

[vil-nakul]

Is there a workaround for esp32 boards.

[AIWintermuteAI]

Yes, look at the forum post.

[vil-nakul]

Ok Thanks. But does turning off ESP NN affect the inference time?

[AIWintermuteAI]

It was not on before for Arduino builds. So if you were using Arduino IDE for ESP32 you will not see any difference. To use ESP NN, you need to build with ESP IDF. That is until I merge the PR, which will take 1-2 weeks.

[automatiek]

PR #5025

[AIWintermuteAI]

PR #5025 should have fixed this. If issue persists, feel free to reopen.

[vegeta340]

Issue still exist in builds done today. Fingers crossed for a solution!

[AIWintermuteAI]

Hmm, yes, it was not deployed to production yet. I'll reopen and close this when it is.

[AIWintermuteAI]

It's in production now, I downloaded new deployment and successfully flashed ESP-EYE with an example.
By the way, we also added Arduino sketches for fusion, microphone and camera sensor inference in this release!