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@Fabryz
Last active December 20, 2015 20:18
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Control the Pi Lite with Node.js $ npm install serialport $ node server.js
/*
* Description: Control the Pi Lite via Node.js
* Author: Fabrizio Codello (fabryz.com)
*
* TODO: Check if writing out of bounds
*/
var SerialPort = require("serialport").SerialPort;
// http://openmicros.org/index.php/articles/94-ciseco-product-documentation/raspberry-pi/280#Using the Pi-Lite pre-loaded software
var PiLite = {
device: "/dev/ttyAMA0",
baudrate: 9600,
client: null,
init: function() {
this.client = new SerialPort(this.device, {
baudrate: this.baudrate
}, false);
},
connect: function(callback) {
this.init();
this.client.open(function() {
console.log('Connected to Pi Lite');
callback();
});
},
write: function(data) {
// console.log('Writing: '+ data);
this.client.write(data, function(err, results) {
if (err) {
console.log('Error: '+ err);
}
// console.log('Result: '+ results);
});
},
// Set scrolling delay in ms 1 is scrolling very fast, 1000 is scrolling very slow. Default speed is 80.
setSpeed: function(value) {
this.write("$$$SPEED"+ value +"\r");
},
// (value) is a 126 character string in one's and zeros to represent each LED state (on or off)
frameBuffer: function(value) {
this.write("$$$F"+ value +"\r");
},
// Column X to Y%
barGraph: function(column, value) {
this.write("$$$B"+ column +","+ value +"\r");
},
// Create graph from an array (max 14 columns)
chart: function(data) {
var that = this;
data.forEach(function(graphValue, index) {
that.barGraph(index + 1, graphValue);
});
},
// Row X (1 | 2) to Y%
vuMeter: function(row, value) {
this.write("$$$V"+ row +","+ value +"\r");
},
// Pixel set a pixel state
// column 1 to 14
// row 1 to 9
// action ON,OFF,TOGGLE
pixel: function(column, row, action) {
this.write("$$$P"+ column +","+ row +","+ action +"\r");
},
// Text display at location x,y a text character
randomPixel: function(time) {
var that = this;
var timer = setInterval(function() {
column = Math.floor(Math.random() * 15),
row = Math.floor(Math.random() * 10);
that.pixel(column, row, "TOGGLE");
}, time);
},
// set all the pixels on or off
all: function(value) {
this.write("$$$ALL,"+ value +"\r");
},
// alias to ALL,OFF
clear: function() {
this.all("OFF");
},
// Scroll value columns left (+) or right (-)
scroll: function(value) {
this.write("$$$SCROLL"+ value +"\r");
},
// Text display at location x,y a text character
text: function(column, row, character) {
this.write("$$$T"+ column +","+ row +","+ character +"\r");
},
// Display each character of the text after time ms, column and row are optional
timed: function(text, time, column, row) {
var that = this;
column = column | 5,
row = row | 2;
var timer = setInterval(function() {
character = text[0];
text = text.substring(1);
// Skip a turn on spaces
if (character !== " ") {
that.clear();
that.text(column, row, character);
}
// TODO: Manually center short letters like I/J?
//if (character == "I" || character == "I") {
// that.clear();
// that.text(column + 1, row, character);
//}
if (text.length <= 0) {
// that.clear();
clearInterval(timer);
}
}, time);
}
};
exports.PiLite = PiLite;
var pilite = require('./node-pilite.js').PiLite;
pilite.connect(function() {
pilite.clear();
// pilite.setSpeed(500);
pilite.randomPixel(50);
});
@woodyrew
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woodyrew commented Sep 9, 2013

Hi, I'm keen to make this an npm module. Would you be happy if I did that linking to this gist to give you credit?

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