https://github.com/decodedco/leap-arduino

Getting leapmotion to talk to arduino
https://github.com/decodedco/leap-arduino

Last synced: 2 months ago
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Getting leapmotion to talk to arduino

• Host: GitHub
• URL: https://github.com/decodedco/leap-arduino
• Owner: DecodedCo
• License: mpl-2.0
• Created: 2014-08-25T22:34:11.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2016-09-23T14:36:10.000Z (over 8 years ago)
• Last Synced: 2024-04-14T18:22:32.841Z (10 months ago)
• Language: JavaScript
• Size: 310 KB
• Stars: 16
• Watchers: 14
• Forks: 6
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Leapmotion + Arduino

Getting leapmotion to talk to arduino.

Top level: Leapmotion makes data available via websockets on ```ws://127.0.0.1:6437```. Node.js can parse this. There is also a Node.js library for talking to Arduino called Johnny-five. You need something called StandardFirmata which standardises commands sent between the Arduino and a host computer, which Johnny-five speaks.

**Note: the `serialport` library only works with node 0.12.x**

## 1. Setup

1. Install [nodejs](http://www.nodejs.org/)

1. Run ``npm install``

## 2. Leapmotion + Node.js

2. Enable websockets on Leapmotion:

	![Enable websockets on Leapmotion](docs/leap_enable_ws.png?raw=true "Enable websockets on Leapmotion")

3. Run ``node leap.js``

4. Sit-back and enjoy the raw JSON feed! Example frame in ``leap.json``

## 3. Arduino + Node.js

1. Flash the Arduino with [StandardFirmata](http://arduino.cc/en/reference/firmata):

	![Install StandardFirmata](docs/arduino_firmata.png?raw=true "Install StandardFirmata")

2. Run ``node arduino.js``

## 4. Arduino + Leapmotion via Node.js

1. Run ``node leap-arduino.js`` (ref [@xavier_seignard](http://xseignard.github.io/2013/06/25/interfacing-leap-motion-with-arduino-thanks-to-nodejs/))

2. Placing one or more hands above leap will switch built-in LED on pin 13 on, otherwise off.

3. Run ``node leap-gestures.js``

4. You should see console output for a Screen Tap, Key Tap, Circle and Swipe.

## 5. Detecting valid ranges from your Leapmotion

1. Run ``node leap-range.js``

2. Move both hands around for a while in all directions

3. Stop program when you stop seeing changes. The final values are the min and max ranges (in mm) of your current setup.

## 6. Leapmotion + Servo (via Arduino and Node.js)

1. Wire up a servo to pin 9.

2. Run ```node servo.js```.

3. Tweak ranges in code if need (servo and leap). Here is a demo video:

	[![Leap Servo demo](http://img.youtube.com/vi/DMbuZKZWZlk/0.jpg)](https://www.youtube.com/watch?v=DMbuZKZWZlk)

## 7. Leapmotion + 6 Servos

Tested using 6 degrees of freedom robot arm from: http://www.lynxmotion.com/c-130-al5d.aspx

1. Open ``six-servos.js`` and adjust parameters

2. Run ``node six-servos.js``

## Resources

* [Johnny-five API](https://github.com/rwaldron/johnny-five/wiki)

* [Leapmotion API](https://developer.leapmotion.com/documentation/cpp/api/Leap_Classes.html)

* [Robotic hand demo](http://www.instructables.com/id/Robotic-Hand-controlled-by-Gesture-with-Arduino-Le/)

* [Robotic lamp demo](http://xseignard.github.io/2013/06/25/interfacing-leap-motion-with-arduino-thanks-to-nodejs/)