The Altimeter class constructs objects that represent a single Altimeter sensor attached to the physical board.
Supported Altimeters:
- BMP180
- BMP280
- BME280
- MPL3115A2
- MS5611
This list will continue to be updated as more component support is implemented.
Parameters
General Options
Property Type Value/Description Default Required controller string 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 elevation number Meters. A reference elevation for relative changes. 1 No
Shape
| Property Name | Description | Read Only |
|---|---|---|
id | A user definable id value. Defaults to a generated uid. | No |
feet | The current altitude value in feet. | Yes |
meters | The current altitude value in meters. | Yes |
Component Initialization
MPL3115A2
new five.Altimeter({
controller: "MPL3115A2"
});
BMP180
new five.Altimeter({
controller: "BMP180"
});
MS5611
new five.Altimeter({
controller: "MS5611"
});
Usage
var five = require("johnny-five");
var board = new five.Board();
board.on("ready", function() {
var barometer = new five.Altimeter({
controller: "MPL3115A2"
});
barometer.on("data", function() {
console.log("Altitude");
console.log(" feet : ", this.feet);
console.log(" meters : ", this.meters);
console.log("--------------------------------------");
});
});
API
There are no Altimeter specific methods.
Events
change The "change" event is emitted whenever the value of the altitude sensor changes.
data The "data" event is fired as frequently as the user defined
freqwill allow in milliseconds.
