Barometer

Rick Waldron edited this page May 3, 2016 · 14 revisions

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

Supported Barometers:

This list will continue to be updated as more component support is implemented.

Parameters

  • General Options

    Property Type Value/Description Default Required
    controller string BMP180, MPL115A2, MPL3115A2. The Name of the controller to use Yes
    address number Address for I2C device. By Device No
    freq number Milliseconds. The rate in ms of data events. 25 No
  • BMP180 Options (controller: "BMP180")

    Property Type Value/Description Default Required
    mode number 0-3. Oversampling ratio mode. 3 No

Shape

Property Name Description Read Only
id A user definable id value. Defaults to a generated uid No
pressure The current pressure value in kPa. Yes

Component Initialization

BMP180

new five.Barometer({
  controller: "BMP180"
});

BMP180

MPL115A2

new five.Barometer({
  controller: "MPL115A2"
});

MPL115A2

MPL3115A2

new five.Barometer({
  controller: "MPL3115A2"
});

MPL3115A2

MS5611

new five.Barometer({
  controller: "MS5611"
});

MS5611

Usage

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

board.on("ready", function() {
  var barometer = new five.Barometer({
    controller: "MPL115A2"
  });

  barometer.on("data", function() {
    console.log("barometer");
    console.log("  pressure : ", this.pressure);
    console.log("--------------------------------------");
  });
});

API

There are no Barometer specific methods.

Events

  • change The "change" event is emitted whenever the value of the barometric pressure sensor changes.

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

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