hybridgroup/cylon-raspi

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examples/i2c/i2c.markdown

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# Raspberry Pi BlinkM

First, let's import Cylon:

    var Cylon = require('cylon');

Now that we have Cylon imported, we can start defining our robot

    Cylon.robot({

Let's define the connections and devices:

      connections: {
        raspi: { adaptor: 'raspi' }
      },

      devices: {
        pixel: { driver: 'blinkm' }
      },

Now that Cylon knows about the necessary hardware we're going to be using, we'll
tell it what work we want to do:

      work: function(my) {
        // Before you can use and work with I2C in the raspberry pi you
        // need to configure it, follow the instructions to enable it here:
        //
        // http://learn.adafruit.com/adafruits-raspberry-pi-lesson-4-gpio-setup/configuring-i2c

        // We first stop the BlinkM light script
        my.pixel.stopScript();

        // You can pass a callback to all blinkm functions as the last param,
        // If you do the command would be executed asynchronously.
        // For write operations you get an (err) param passed back,
        // null/undefined for success, and containing the error y any encountered.

        // BlimkM  Write Commands.
        //   my.pixel.goToRGB(255, 0, 0)
        //   my.pixel.fadeToRGB(0, 255, 0)
        //   my.pixel.fadeToRGB(0, 0, 255)
        //   my.pixel.fadeToHSB(100, 180, 90)
        //   my.pixel.fadeToRandomRGB(0, 0, 255)
        //   my.pixel.fadeToRandomHSB(100, 180, 90)
        //   my.pixel.playLightScript(1, 0, 0)
        //   my.pixel.stopScript()
        //   my.pixel.setFadeSpeed(50)
        //   my.pixel.setTimeAdjust(50)

        my.pixel.goToRGB(255, 0, 0);
        my.pixel.fadeToRGB(0, 255, 0);
        my.pixel.fadeToRGB(0, 0, 255);


        // For read commands you get (err, data) passed back to the callback,
        // data contains the read data buffer, in case of Sync call (no callback)
        // you get a regular return with the data buffer.
        var color = my.pixel.getRGBColor();
        console.log(color);

        // Example getting the color usinc async call and a callback
        my.pixel.getRGBColor(function(err, data) {
          if (err == null) { console.log(data); }
        });
      }

Now that our robot knows what work to do, and the work it will be doing that
hardware with, we can start it:

    }).start();