[x] Freshen node version and module dependencies [] What changed since last year
##Setup instructions
Use Arduino and chipKIT-core 1.4.1
Check if PlatformIO has updated the to chipKIT-core 1.4.1
pio run -e fubarino_mini -t upload
##Lab Manual
First Fubarino_Mini has the LED on pin 0.
const config = require('config');
const five = require('johnny-five');
const board = new five.Board({ port: config.get('port') });
const PIN_LED1 = 1; // Fubarino_mini pin 1
board.on('ready', function() {
// Create an Led on LED_PIN
const led = new five.Led(PIN_LED1);
// Strobe the pin on/off, defaults to 100ms phases
led.strobe();
});
The button for the Fubarion_Mini is on pin 16.
const config = require('config');
const logger = require('winston');
const five = require('johnny-five');
const board = new five.Board({
port: config.get('port'),
});
const PIN_BTN1 = 16;
board.on('ready', function() {
const button = new five.Button({
pin: PIN_BTN1,
invert: true,
});
// Make button accessible from the command line
board.repl.inject({ button, button });
// 'down' event the button is pressed
button.on('down', function() {
logger.log('info', 'down');
});
// 'hold' event the button is pressed for specified time.
// defaults to 500ms (1/2 second)
button.on('hold', function() {
logger.log('info', 'hold');
});
// 'up' event the button is released
button.on('up', function() {
logger.log('info', 'up');
});
});
We'll put this one on A2, pin 4
const config = require('config');
const logger = require('winston');
const five = require('johnny-five');
const A2 = 4;
const board = new five.Board();
let potentiometer;
board.on('ready', function() {
// Create a new `potentiometer` hardware instance.
potentiometer = new five.Sensor({
pin: A2,
freq: 250,
});
// Inject the `sensor` hardware into
// the Repl instance's context;
// allows direct command line access
board.repl.inject({
pot: potentiometer,
});
// 'data' get the current reading from the potentiometer
potentiometer.on('data', function() {
logger.log('info', `${this.value}, ${this.raw}`);
});
});
We'll read temperature from A0 as well
const config = require('config');
const logger = require('winston');
const five = require('johnny-five');
const A0 = 0;
const board = new five.Board({
port: config.get('port'),
});
let tSensor;
board.on('ready', function() {
tSensor = new five.Thermometer({
controller: 'TMP36',
pin: A0,
freq: 250,
aref: 3.3,
});
tSensor.on('data', function() {
logger.log('info', 'celsius: %d', this.C);
logger.log('info', 'fahrenheit: %d', this.F);
logger.log('info', 'kelvin: %d', this.K);
});
board.repl.inject({
tmp36: tSensor,
});
});
Read, Evaluate, Print Loop (REPL) This is a command line interface to the objects created using Johnny-five.
>>>led.on()
>>>led.off()
Connect the LED, button, and temperature sensor to a CRUD Rest Application.
What is a RESTful application? TODO: Answer:
Create, Read, Update, Delete (CRUD) features mapped to the HTTP protocol.
| Action | URL | HTTP Verb | POST body | Result |
|---|---|---|---|---|
| Create /api/devices | POST | JSON String | Create new part | |
| Read "Get all" | /api/devices | GET | empty | return all devices |
| Read "Get one" | /api/devices/:id | GET | empty | get one part |
| Update | /api/devices/:id | PUT | JSON string | Update an existing part |
| Delete | /api/devices/:id | DELETE | empty | delete specific part |
What does this mean for: INPUTS
- button
- Create
- Read
- temperature sensor
- Create
- Read
OUTPUTS
- led
- Create
- Update
- led strip
- Create
- Update
INPUT/OUTPUT
- SD Card (SPI, I2C, Serial)
- Create
- Read
- Update
- Delete
###Create a RESTful mapping for LED, button, temperature sensor
LED
| Action | URL | HTTP Verb | POST body | Result |
|---|---|---|---|---|
| Create | /dev/led | POST | JSON String | Turn led on with a pattern/command |
| Read "Get all" | /dev/led | GET | empty | get status |
| Read "Get one" | /dev/led/:id | GET | empty | get status |
| Update | /dev/led/:id | PUT | JSON string | Update parameters and values for command |
| Delete | /dev/led/:id | DELETE | empty | turn off led |
The commands correspond to the johnny-five LED object library methods: LED API parameters http://johnny-five.io/api/led/
- on
- off
- toggle
- blink
- strobe
- brightness
- fade
- stop
- pulse
- fadeIn
- fadeOut
Groups of leds http://johnny-five.io/api/leds/
###Connect to a Web Server and Page using Express
For this lab all of the steps above will be completed and we'll just examine the server and part relationship with a complete example.
Node.js tools:
- express
- body-parser
- ejs
- johnny-five
npm install express body-parser ejs johnny-five --save
Examples:
- Review the issue of scope for combining two kinds of programs.
var express = require('express');
var app = express();
var five = require("johnny-five");
var button;
var led;
var temp;
var tempValue;
var btnStatus;
var PIN_LED1 = 21; //0
var PIN_BTN1 = 23; //16
var board = new five.Board();
board.on("ready", function() {
led = new five.Led(PIN_LED1);
button = new five.Button({
pin: PIN_BTN1 ,
invert: true
});
// "down" the button is pressed
button.on("down", function() {
btnStatus = "down";
led.on();
console.log("down");
});
// "hold" the button is pressed for specified time.
button.on("hold", function() {
btnStatus = "hold";
console.log("hold");
});
// "up" the button is released
button.on("up", function() {
btnStatus = "up";
console.log("up");
});
temp = new five.Sensor({
pin: "A0",
freq: 250,
threshold: 5
});
// When the sensor value changes, log the value
temp.on("change", function(value) {
tempvalue = value*330/1024);
console.log(value*330/1024);
});
console.log("Board is Ready!");
});
//Express section
app.get('/', function (req, res) {
res.send('Devices Connected:');
});
//app.route('/').get(callback).post(toggle)
app.get('/led/on', function (req, res) {
if(board.isReady){
led.on();
}
res.send('led on!');
});
app.get('/led/off', function (req, res) {
if(board.isReady){
led.off();
}
res.send('led off!');
});
app.get('/temp', function (req, res) {
var val = "not ready";
if(board.isReady){
val = tempvalue;
}
//res.status(status).send(body);
res.send('Temperature:' + val);
});
app.get('/button', function (req, res) {
if(board.isReady){
res.send('Button:' + btnStatus);
} else {
res.status(status).send("button not ready");
}
});
app.listen(3000, function () {
console.log('Example app listening on port 3000!');
});
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