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).

Issues

Please open one on adafruit-motor-hat/issues.

Author

Feel free to reach out on Twitter.