adafruit-motor-hat's Introduction

Motor Hat for Android Things

Android Things driver for Adafruit's DC & Stepper Motor Hat for Raspberry Pi.

This is a port of the original Python library from Adafruit to Android Things. Please note this is still a work in progress, as only DC motors are supported (contributions to support stepper motors are most welcome though).

Usage

Basic usage:

// Create a default object with no changes to I2C address or frequency
mh = new AdafruitMotorHat();

int motorIndex = 1; // Can be 1, 2, 3, 4
AdafruitDCMotor myMotor = mh.getMotor(motorIndex);

// Set the speed to start, from 0 (off) to 255 (max speed)
myMotor.setSpeed(150);
myMotor.run(AdafruitMotorHat.FORWARD);

Move forward:

myMotor.run(AdafruitMotorHat.FORWARD);

// Speed up.
for (int i = 0; i < 255; i++) {
  myMotor.setSpeed(i);
  Thread.sleep((long) (0.01 * 1000));
}

// Slow down.
for (int i = 254; i >= 0; i--) {
  myMotor.setSpeed(i);
  Thread.sleep((long) (0.01 * 1000));
}

Move backwards:

myMotor.run(AdafruitMotorHat.BACKWARD);

// Speed up.
for (int i = 0; i < 255; i++) {
  myMotor.setSpeed(i);
  Thread.sleep((long) (0.01 * 1000));
}

// Slow down.
for (int i = 254; i >= 0; i--) {
  myMotor.setSpeed(i);
  Thread.sleep((long) (0.01 * 1000));
}

Release:

myMotor.run(AdafruitMotorHat.RELEASE);
Thread.sleep((long) (1.0 * 1000));

Code

The Android Studio projects includes two modules:

The lib module has the code you'll want to include on your own projects. It's a port of the original Python library using Android's com.google.android.things.pio.I2cDevice under the hood.
The app module shows a simple example of how to use the library (see the video linked above to see the MainActivity running).

This library is not available on Maven (yet).