shortjared/server.rb

## server.rb
# coding: utf-8
require 'sinatra'
require 'sinatra-websocket'
require 'serialport'

set :server, 'thin'
set :sockets, []

## Setup to read from your device via serial port
ser = SerialPort.new("/dev/your_device", 9600, 8, 1, SerialPort::NONE)

## Starts countously reading from Serial Port and sending data to all connected clients
count = 0
rns = Array.new()
EM.defer do
    while true do
            response = ser.readline("\r")
            response.chomp!
            rns << response.to_i
            count += 1
            if count == 500
                count = 0
                res=Hash[rns.group_by {|x| x}.map {|k,v| [k,v.count]}]
                rns.clear
                settings.sockets.each{|s| s.send(res.to_s) }
            end
    end
end

## On first request, send erb template, then we just manage sockets
get '/' do
  if !request.websocket?
    erb :index
  else
    request.websocket do |ws|
      ws.onopen do
        settings.sockets << ws
      end
      ws.onclose do
        settings.sockets.delete(ws)
      end
    end
  end
end

__END__
@@ index
<html>
  <body>
     <h1 class="text-align:center">Serial Data from Source</h1>
     <div id="data"></div>
  </body>

  <script type="text/javascript">
    window.onload = function(){
      (function(){
        var show = function(el){
          return function(msg){ el.innerHTML = msg + '<br />' + el.innerHTML; }
        }(document.getElementById('data'));

        var ws       = new WebSocket('ws://' + window.location.host + window.location.pathname);
        ws.onmessage = function(m) { show(m.data); };
      })();
    }
  </script>
</html>

## sketch.ino
void setup() {
  // initialize the serial communication:
  Serial.begin(9600);

  // send the value of analog input 0 (electronic noise)
  randomSeed(analogRead(A0));
}

void loop() {
  //Send a random integer from 1 to 10 to serial port
  Serial.println(random(1,11));
}
	# coding: utf-8
	require 'sinatra'
	require 'sinatra-websocket'
	require 'serialport'

	set :server, 'thin'
	set :sockets, []

	## Setup to read from your device via serial port
	ser = SerialPort.new("/dev/your_device", 9600, 8, 1, SerialPort::NONE)

	## Starts countously reading from Serial Port and sending data to all connected clients
	count = 0
	rns = Array.new()
	EM.defer do
	while true do
	response = ser.readline("\r")
	response.chomp!
	rns << response.to_i
	count += 1
	if count == 500
	count = 0
	res=Hash[rns.group_by {\|x\| x}.map {\|k,v\| [k,v.count]}]
	rns.clear
	settings.sockets.each{\|s\| s.send(res.to_s) }
	end
	end
	end

	## On first request, send erb template, then we just manage sockets
	get '/' do
	if !request.websocket?
	erb :index
	else
	request.websocket do \|ws\|
	ws.onopen do
	settings.sockets << ws
	end
	ws.onclose do
	settings.sockets.delete(ws)
	end
	end
	end
	end

	__END__
	@@ index
	<html>
	<body>
	<h1 class="text-align:center">Serial Data from Source</h1>
	<div id="data"></div>
	</body>

	<script type="text/javascript">
	window.onload = function(){
	(function(){
	var show = function(el){
	return function(msg){ el.innerHTML = msg + '<br />' + el.innerHTML; }
	}(document.getElementById('data'));

	var ws = new WebSocket('ws://' + window.location.host + window.location.pathname);
	ws.onmessage = function(m) { show(m.data); };
	})();
	}
	</script>
	</html>
	void setup() {
	// initialize the serial communication:
	Serial.begin(9600);

	// send the value of analog input 0 (electronic noise)
	randomSeed(analogRead(A0));
	}

	void loop() {
	//Send a random integer from 1 to 10 to serial port
	Serial.println(random(1,11));
	}