StepperRpi

Provides a simple and a convenient way to control a stepper motor from the Raspberry Pi board. There are a lot of different stepper motors and a various drivers to control them, and this library takes this into account and provides a couple of abstractions - implementing them we can control literally any stepper motor without touching the main interface.

Installation

Add this line to your application's Gemfile:

gem 'stepper_rpi', github: 'sergio1990/stepper_rpi'

And then execute:

$ bundle install

Usage

There are various drivers available for stepper motors control, such as:

• ULN2003
• A4988
• DRV8825
• etc...

Also, there are various gems available in order to perform GPIO management on Raspberry Pi.

In order to make this library useful for the most possible cases, two abstractions were added:

• abstract driver
• abstract GPIO adapter

The class diagram represents all the mentioned abstractions and their relationships with another classes:

Hence, in order to use this library the next things should be implemented:

• a driver - according to the microchip you're going to use; the driver for the ULN2003 chip is available OOTB
• a GPIO adapter - no adapter available OOTB so far, just use your favorite GPIO wrapper gem when implementing your own GPIO adapter

Please, visit the examples folder to get insights about how to use the library.

Tests

This library was successfully tested using the following hardware combinations:

• Raspberry Pi Zero W v1.1; ULN2003 driver shield; 28BYJ-48-5V stepper motor
• Raspberry Pi Zero 2 W; DRV8825 driver shield; NEMA14 JK35HS34-1004 stepper motor

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/sergio1990/stepper_rpi.

License

The gem is available as open source under the terms of the MIT License.