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Breakage caused by removal of "Arduino_TensorFlowLite" library from Library Manager

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
github-actions, tensorflow
Domain
ci-cd, documentation, embedded-iot

Research direction

Start with the installation section in GestureToEmoji/exercises/exercise1.md, the IMU_Classifier sketch, and .github/workflows/compile-sketches.yml. Check how the TensorFlow library is installed and which header the sketch includes, then verify that the documentation and workflow use the supported installation path and that the sketches compile successfully.

Written by the indexing model from the issue text.

Description

The "Arduino_TensorFlowLite" library dependency of these tutorials was removed from Library Manager at the request of the TensorFlow Lite Micro maintainers (https://github.com/arduino/library-registry/pull/1748).

That removal impacts this project in several ways:

Documentation

The installation instructions specify installation of the library from Library Manager:

https://github.com/arduino/ArduinoTensorFlowLiteTutorials/blob/master/GestureToEmoji/exercises/exercise1.md#arduino-libraries

Install the following Arduino libraries using the Library manager:

  • TensorFlow Lite library (search for "Arduino_TensorFlowLite")

This is no longer possible.

TensorFlow's library must be installed manually. The library's documentation provides instructions:

https://github.com/tensorflow/tflite-micro-arduino-examples#how-to-install

Code

TensorFlow's library does not contain the file tensorflow/lite/version.h, so the code that contains an #include directive for this header no longer compiles:

home/runner/work/ArduinoTensorFlowLiteTutorials/ArduinoTensorFlowLiteTutorials/GestureToEmoji/ArduinoSketches/IMU_Classifier/IMU_Classifier.ino:28:10: fatal error: tensorflow/lite/version.h: No such file or directory
   #include <tensorflow/lite/version.h>
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
  compilation terminated.

CI

The repository contains a GitHub Actions workflow that provides a "smoke test" on relevant changes to the project by compiling the sketches:

https://github.com/arduino/ArduinoTensorFlowLiteTutorials/blob/master/.github/workflows/compile-sketches.yml

The workflow is configured to install the dependency from Library Manager, which now fails:

Running command: /home/runner/bin/arduino-cli lib install Arduino_TensorFlowLite 
   Error installing Arduino_TensorFlowLite: Library 'Arduino_TensorFlowLite' not found
Dominant language
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Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

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