Processing Forum

application applet no display

[1 Reply]
- 13-Oct-2012 11:45 PM
- Forum: Integration and Hardware
the following is a simple sketch to display temperature graph by taking value from serial port from an arduino board with temperature sensor..

however the index.html file as well as the application exported from this sketch do not display anything.

i tried after signing the executable jar file in applet folder , however it did not help , is there anything in the program which is preventing the display.

import processing.serial.*;

String temperature = "0";

PFont font;

Serial port;

int xPos=100;

float Maxi=0;

float Mini=100;

int counter=0;

void setup() {

String portName = Serial.list()[2];

port = new Serial(this, portName, 9600);

font = loadFont("Ziggurat-HTF-Black-32.vlw");

textFont(font);

textAlign(CENTER);

size(600, 600);

background(0);

fill(0);

smooth();

}

void draw() {

counter= counter+1;

fill(50,100,180);

text("time >> " , width/2, height-50);

text("temp " ,60,height-250);

text("^",60,height-260);

text("^",60,height-280);

if (port.available()>0) {

delay(100);

temperature = port.readString();

}

//background(255); // Set background to dark gray

fill(255);

rect(0,0,600,200);

stroke(20,20,250);

for(int i=100; i <601 ; i= i+25)

line(i,200,i,500);

for(int j=200;j <501; j= j+25)

line(100,j,600,j);

fill(0);

text("temp : "+temperature+ "Deg. Cel", width/2, height/8);

text("Max. "+ Maxi+"Deg. Cel",width/2,140);

if(counter>200)

text("Min. "+ Mini+"Deg. Cel",width/2,180);

//fill(255);

//text("time >> " , width/2, height-50);

//text("temp " ,80,height-200);

if (temperature != null)

{ // trim off any whitespace

temperature = trim(temperature);

}

//convert to an int and map to the screen height

float tempe = float(temperature);

print(" aftr string2flt="+tempe+" "+" string="+temperature);

//alarm placing

if(Maxi<tempe)

Maxi=tempe;

if(counter>200)

{

if(Mini>tempe)

Mini=tempe;

}

if(tempe > 35.0)

{stroke(200,10,20);

fill(255,10,10);

text("Overheating ",width/2,250);

}

else

stroke(10,200,20);

//mapping

tempe = map(tempe,0,100,0,(height-300));

println("mapped="+tempe+" height="+height+" ");

//draw the line

line( xPos , 500 , xPos ,(height-100)-(int)tempe);

delay(1000);

xPos= xPos+1;

if(xPos >=width)

{xPos=100;

fill(0);

rect(100,200,width-100,height-300);

}

//}

}

Programming plus html

[1 Reply]
- 12-Oct-2012 05:44 AM
- Forum: General Discussion
On an arduino ethernet shield over which output of certain sensors is displayed.

how can i display these values using the same processing sketch in another PC's web browser connected via a switch.

UDP packet tx/rx / programming question

[1 Reply]
- 08-Oct-2012 07:43 PM
- Forum: Integration and Hardware
import hypermedia.net.*;

int PORT_RX=3000; //port <<<< how to obtain this , i'm using a laptop ????

String HOST_IP="195.100.101.60"; //

UDP udp;

String receivedFromUDP = " ";

void setup() {

size(400,400);

udp= new UDP(this,PORT_RX,HOST_IP);

udp.log(true);

udp.listen(true);

super.start();

println("start called");

}

void draw() {

background(0);

println("entered draw");

text(receivedFromUDP, 50, 50);

}

void receive(byte[] data, String HOST_IP, int PORT_RX)

{

println("entered receive "); // <<<<< never gets printed, means it never enters this function/when is this function called //and who calls it

receivedFromUDP ="";

for (int i = 0; i < data.length; i++) {

println("entered loop");

receivedFromUDP += str(data[i]) + " ";

}

println(data);

}

the corresponding arduino web server program tx the udp packet is..

#include <SPI.h>

#include <Ethernet.h>

#include <EthernetUdp.h>

// Enter a MAC address and IP address for your controller below.

// The IP address will be dependent on your local network:

byte mac[] = {

0x90, 0xA2, 0xDA, 0x0D, 0x0C, 0xE9 };

IPAddress ip(195, 100, 101, 65);

unsigned int localPort = 8888; // local port to listen on

// An EthernetUDP instance to let us send and receive packets over UDP

EthernetUDP Udp;

void setup() {

// start the Ethernet and UDP:

Ethernet.begin(mac,ip);

Udp.begin(localPort);

}

void loop() {

Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());

Udp.write("hello");

Udp.endPacket();

}

Digital battlefield...plzzz help

[3 Replies]
- 28-Aug-2012 10:40 AM
- Forum: General Discussion
4 sensors at the corners of a square room/area.

Room/Field divided into small equal size squares.

A Target would be emitting some signal,which will be received at the four sensors.The signal strength at each sensor inversely proportional to the distance of target from sensors.

AIM-Based on the signal received at the four sensors to locate the Target.

I plan to take sample values at the RED dots shown in Image,i.e. Signal strength at each sensor for target placed at that specific red dot.

How to go about it? how to store the Sample values ?

then based on actual field values,to compare them with sample values and locate the target inside one particular square.

if anyone can help...plzzzzzzzzzzzzz

Activity Trend