Thermometer

Rick Waldron edited this page Nov 23, 2016 · 18 revisions

The Thermometer class constructs objects that represents a single Thermometer/Temperature sensor attached to the physical board.

Johnny-Five currently supports several kinds of Thermometer/Temperature sensors:

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

Parameters

  • General Options

    Property Type Value/Description Default Required
    controller string ANALOG, LM35, TMP36, DS18B20, MPU6050, GROVE, BMP180, MPL115A2, MPL3115A2, HTU21D, MCP9808, SI7020, SI7021. The Name of the controller to use. ANALOG no
    pin string or int Analog Pin. Use with analog sensor. Yes1
    toCelsius function function toCelsius(raw) {} A raw-to-celsius transform override no
    freq Number Milliseconds. The rate in milliseconds to emit the data event 25ms no

1 Yes for analog devices. No for digital devices (MPU6050 or DS18B20)

Shape

Property Name Description Read Only
id A user definable id value. Defaults to a generated uid No
celsius The temperature in celsius degrees. Yes
fahrenheit The temperature in fahrenheit degrees. Yes
kelvin The temperature in kelvin degrees. Yes
C A convenience alias for celsius. Yes
F A convenience alias for fahrenheit. Yes
K A convenience alias for kelvin. Yes

Component Initialization

Analog

// Create an analog Thermometer object:
new five.Thermometer({
  pin: "A0",
  toCelsius: function(raw) { // optional
    return (raw / sensivity) + offset;
  }
});

LM35

new five.Thermometer({
  controller: "LM35",
  pin: "A0"
});

LM35

TMP36

new five.Thermometer({
  controller: "TMP36",
  pin: "A0"
});

TMP36

TMP102

new five.Thermometer({
  controller: "TMP102"
});

TMP102

DS18B20

new five.Thermometer({
  controller: "DS18B20",
  pin: "A0"
});

DS18B20

MPU6050

// Create an MPU-6050 Thermometer object:
//
//  - attach SDA and SCL to the I2C pins on your board (A4 and A5 for the Uno)
//  - specify the MPU6050 controller
new five.Thermometer({
  controller: "MPU6050"
});

MPU6050

MPL115A2

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

MPL115A2

MPL3115A2

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

MPL3115A2

BMP180

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

BMP180

HTU21D

new five.Thermometer({
  controller: "HTU21D"
});

HTU21D HTU21D HTU21D HTU21D

HIH6130

new five.Thermometer({
  controller: "HIH6130"
});

HIH6130

MCP9808

new five.Thermometer({
  controller: "MCP9808"
});

MCP9808 MCP9808

MS5611

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

MS5611

TH02

new five.Thermometer({
  controller: "TH02"
});

TH02

DHT11_I2C_NANO_BACKPACK

new five.Thermometer({
  controller: "DHT11_I2C_NANO_BACKPACK"
});

DHT11_I2C_NANO_BACKPACK

DHT21_I2C_NANO_BACKPACK

new five.Thermometer({
  controller: "DHT21_I2C_NANO_BACKPACK"
});

DHT21_I2C_NANO_BACKPACK

DHT22_I2C_NANO_BACKPACK

new five.Thermometer({
  controller: "DHT22_I2C_NANO_BACKPACK"
});

DHT22_I2C_NANO_BACKPACK

SI7020

new five.Thermometer({
  controller: "SI7020"
});

SI7020

SI7021

new five.Thermometer({
  controller: "SI7021"
});

SI7021

Usage

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

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

  var temperature = new five.Thermometer({
    pin: "A0"
  });

  temperature.on("data", function() {
    console.log("celsius: %d", this.C);
    console.log("fahrenheit: %d", this.F);
    console.log("kelvin: %d", this.K);
  });
});

API

There are no special API functions for this class.

Events

  • change The "change" event is emitted whenever the value of the temperature changes.

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