Gyro - lyzadanger/johnny-five GitHub Wiki

The Gyro class constructs objects that represent a single analog Gyro sensor attached to the physical board.

This list will continue to be updated as more Gyro devices are confirmed.

Parameters

  • pins An Array of String address values for the Gyro's x and y pin (analog only).
var gyro = new five.Gyro(["A0", "A1"]);

var gyro = new five.Gyro({
  pins: ["A0", "A1"]
});
  • options An object of property parameters.
<tr>
  <td>amplify</td>
  <td>Number</td>
  <td>--</td>
  <td>Currently unused</td>
  <td>no</td>
</tr>
<tr>
  <td>sensitivity</td>
  <td>Number</td>
  <td>Varies by device</td>
  <td>This value can be identified in the device's datasheet</td>
  <td>no</td>
</tr>
Property Name Type Value(s) Description Required
pins Array of Strings ["A*"] The String analog pins that X and Y are attached to yes
```js // Create an analog Gyro object: // // - attach X and Y to "A0" and "A1" respectively // - Use the LPR5150AL 4X sensitivity rating // var gyro = new five.Gyro({ pins: ["A0", "A1"], sensitivity: 0.67 }); ```

Shape

{ 
  id: A user definable id value. Defaults to a generated uid
  pins: The pins defined for X and Y.
  pitch: An object containing values for the pitch rate and angle. READONLY
  roll: An object containing values for the roll rate and angle. READONLY
  rate: And object containing the rate values of X and Y. READONLY
  x: Value of x axis. READONLY
  y: Value of y axis. READONLY
}

Usage

var five = require("johnny-five"), 
    board = new five.Board();

board.on("ready", function() {

  var gyro = new five.Gyro({
    pins: ["I0", "I1"],
    sensitivity: 0.67 // LPR5150AL 4X
  });

  gyro.on("change", function(err, data) {
    console.log("X raw: %d rate: %d", this.x, this.rate.x);
    console.log("Y raw: %d rate: %d", this.y, this.rate.y);
  });
});

Events

  • change The "change" event is emitted whenever the value of the gyro changes more then the threshold value allows.

  • data The "data" event is fired as frequently as the user defined freq will allow in milliseconds. ("data" replaced the "read" event)

Examples

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