Cylon LED controller

In this sample, you will use Cylon running on a Raspberry Pi 2 or 3 to blink the LED on an Arduino (with Firmata installed) once per second.

Hardware required

  • Raspberry Pi 2 or 3.
  • Arduino Board (Leonardo is used in this sample).
  • USB to Micro USB cable.

Set up your PC

  • Install Python 2.7.
  • Install Arduino software from here.
  • Install Git for Windows. Ensure that Git is included in your ‘PATH’ environment variable.

Upload Firmata to your Arduino

  • Connect the Arduino board with your PC using the USB cable.
  • Open Arduino software.
  • Go to Tools->Port and select your device.
  • Go to Tools->Board and click on the type of Arduino you have.
  • Go to File->Examples->Firmata and select StandardFirmata. This will open up a new window with the Firmata sketch.
  • Click the upload button to upload the sketch to the Arduino board. You should see a “Done uploading” message when the upload is complete.

Copy Node.js to your Raspberry Pi 2 or 3

  • Download the zip file with ARM Node.js (ChakraCore) from here to your PC and extract the files (node.exe and chakracore.dll).
  • Use Windows file sharing, PowerShell, or SSH to create C:\Node.js (ChakraCore) folder on your Raspberry Pi 2 or 3.
  • Copy node.exe and chakracore.dll to C:\Node.js (ChakraCore) on your Raspberry Pi 2 or 3.

Create a file with the code to control the Arduino LED

Create new folder called “CylonSample” on your PC. Open the folder and create a new file called cylonsample.js and place the contents below to it.

    var Cylon = require('cylon');
    
    Cylon.robot({
      connections: {
        arduino: { adaptor: 'firmata', port: 'COM5' }
      },
    
      devices: {
        led: { driver: 'led', pin: 13 }
      },
    
      work: function(my) {
        every((1).second(), my.led.toggle);
      }
    }).start();

Get Cylon

  • Open a command window.
  • Navigate to the CylonSample folder (created in the previous section).
  • Run npm install cylon cylon-firmata cylon-gpio cylon-i2c --target_arch=arm

Copy the sample to your Raspberry Pi 2 or 3

Open up an explorer window on your PC and enter \\<IP address of your device>\C$ to access files on your device. The credentials (if you have not changed them) are:

username: <IP address or device name, default is minwinpc>\Administrator
password: p@ssw0rd

Copy the CylonSample folder on your PC to C:\CylonSample on the Raspberry Pi 2 or 3.

Set up the connection between your Arduino and Raspberry Pi 2 or 3

Connect your Arduino and Raspberry Pi 2 or 3 with the USB cable. When you do, if your Raspberry Pi 2 or 3 is connected to a monitor, you should see the device getting recognized like in the image below:

Arduino Start Screen

We also need to assign a port name to (e.g. ‘COM5’) to the Arduino. Follow these steps to do this:

  • In PowerShell connected to the Raspberry Pi 2 or 3, run devcon status usb*. When you do this, you should see a device similar to the one below:

    USB\VID_2341&PID_8036\5&3753427A&0&4
    Name: USB Serial Device
    Driver is running.

  • Run reg add "HKLM\SYSTEM\ControlSet001\Enum\usb\VID_2341&PID_8036\5&3753427A&0&4\Device Parameters" /v "PortName" /t REG_SZ /d "COM5" /f.
  • Run shutdown /r /t 0 to reboot the device.
  • When the device restarts, reconnect PowerShell and you can run the sample code!

Run the sample!

In PowerShell, run the command & 'C:\Node.js (ChakraCore)\Node.exe' C:\CylonSample\cylonsample.js. After running the command, the LED (shown with the arrow in the picture below) on the Arduino should start blinking every 1 second.

Arduino RPi2

GitHub

No sample code available

Language: Node.js

Tags: intermediate, node.js, console

Verified to work with:
Windows 10 IoT Core: Version 10.0.10586.0
Visual Studio 2015 update 2
Windows SDK: Version 10586
(Included with Visual Studio Update 2)


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