Model trained by Google Colab cannot run in Donkey Car

Today I am running my colab notebook to train the model for donkey car and notice that the default tensorflow runtime has been upgraded to tensorflow 1.15.0. I actually don’t care about it until I run the model on donkey car and the following error happen

loading model models/tub3.h5
Traceback (most recent call last):
File "/home/pi/env/lib/python3.7/site-packages/tensorflow_core/python/keras/engine/", line 81, in __init__
raise ValueError('Unrecognized keyword arguments:', kwargs.keys())
ValueError: ('Unrecognized keyword arguments:', dict_keys(['ragged']))

I have omitted some of the error for simplicity but the problem looks like it is caused by incompatible version of tensorflow. The first thing I tried is to downgrade the tensorflow model to colab but it doesn’t work. The latest colab doesn’t like tensorflow 1.13.1

So it leave me no choice but to download and install tensorflow 1.15.0 on pi. The problem is, I am running on buster and therefore running python 3.7. If you just simply do a pip install tensorflow==1.15.0 it won’t work because it is not available on the repository yet. Someone is kind enough to put the compiled version on github and you can download it here. To install it, just run this command on the pi:

pip install tensorflow-1.15.0-cp37-cp37m-linux_armv7l.whl

After installing it, you should be able to run the model.

Love Self-driving technology and machine learning. Community leader in DIYRobocar Hong Kong.

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