emlearn 0.3.1

Machine learning for microcontrollers and embedded systems

emlearn

Machine learning for microcontroller and embedded systems. Train in Python, then do inference on any device with a C99 compiler.

Key features

Embedded-friendly Inference

• Portable C99 code
• No libc required
• No dynamic allocations
• Support integer/fixed-point math
• Single header file include

Convenient Training

• Using Python with scikit-learn
• C classifier accessible in Python using pybind11

MIT licensed

Can be used as an open source alternative to MATLAB Classification Trees, Decision Trees using MATLAB Coder for C/C++ code generation. fitctree, fitcensemble, TreeBagger, ClassificationEnsemble, CompactTreeBagger

Status

Minimally useful

Classifiers:

• eml_trees: Random Forests, ExtraTrees
• eml_net: MultiLayerPerceptron
• eml_bayes: GaussianNaiveBayes

Feature extraction:

• eml_audio: Melspectrogram

Tested running on AVR Atmega, ESP8266 and Linux.

Installing

Install from PyPI

pip install --user emlearn

Usage

1. Train your model in Python

from sklearn.ensemble import RandomForestClassifier
estimator = RandomForestClassifier(n_estimators=10, max_depth=10)
estimator.fit(X_train, Y_train)
...

2. Convert it to C code

import emlearn
cmodel = emlearn.convert(estimator, method='inline')
cmodel.save(file='sonar.h')

3. Use the C code

#include "sonar.h"

const int32_t length = 60;
int32_t values[length] = { ... };
const int32_t predicted_class = sonar_predict(values, length):

For full example code, see examples/digits.py and emlearn.ino