How to send the hex values from processing through serial ?.

msureshkumar2610

I need to send this 11 Series bytes(0xEF,0x01,0xFF,0xFF,0xFF,0xFF,0x01,0x00,0x03,0x01,0x00,0x05) from processing to serial.

import processing.serial.*;
int value = 0;
Serial myPort;  
int val;        
byte collect[] = {0xEF,0x01,0xFF,0xFF,0xFF,0xFF,0x01,0x00,0x03,0x01,0x00,0x05};

void setup() 
{
  size(200, 200);
  myPort = new Serial(this, "COM6", 57600);
}

void draw() {
  fill(value,0,255);
  rect(25, 25, 50, 50);
}

void mouseClicked() {
  if (value == 0) {
    value = 255;
    for(int i=0;i<=11;i++){
      myPort.write(collect[i]);
    }
  } else {
    value = 0;
  }
}

I got error while using this byte data type

Which data type I need to use for this kind of HEX values ?.

neilcsmith_net

Have you tried making collect an int[]?

msureshkumar2610

No. wait I will check and update

msureshkumar2610

I receive like this ïÿÿÿÿ

msureshkumar2610

baud rate is same. but I got like this ïÿÿÿÿ

import processing.serial.*;
int value = 0;
Serial myPort;  
int val;        
int collect[] = {0xEF,0x01,0xFF,0xFF,0xFF,0xFF,0x01,0x00,0x03,0x01,0x00,0x05};

void setup() {
  size(200, 200);
  myPort = new Serial(this, "COM6", 57600);
}

void draw() {
  fill(value,0,255);
  rect(25, 25, 50, 50);
}

void mouseClicked() {
  if (value == 0) {
    value = 255;
    for(int i = 0 ; i <= 11 ; i++) {
      myPort.write(collect[i]);
    }
  } else {
    value = 0;
  }
}

Arduino code

#include <SoftwareSerial.h>

char val; // Data received from the serial port
int ledPin = 13; // Set the pin to digital I/O 4

SoftwareSerial mySerial(2,3);

void setup() {
  pinMode(ledPin, OUTPUT); // Set pin as OUTPUT
  Serial.begin(57600); // Start serial communication at 57600 bps
  mySerial.begin(57600); // Software Serial communication at 57600 bps. read other port what actually going 
}

void loop() {
  while (Serial.available()) { // If data is available to read,
     mySerial.write(Serial.read()); // read it and store it in val
  }
}

Lord_of_the_Galaxy

You need to learn how to format your code in the forum.
Press the gear icon to edit your post, select your code and press ctrl + o. Leave a line above and below.

msureshkumar2610

Thank you very much for this info. I used arduino forum. This forum is new for me. thank you. Now I edited Please and guide me. Thank you

Lord_of_the_Galaxy

Well, start by checking if the Arduino part of the code works.
Instead of just relaying whatever the Arduino receives from Processing, remove processing all together and trigger the sending of data using a button in Arduino.

msureshkumar2610

Yes. I tested it is working manually

Lord_of_the_Galaxy

And it works with lower baud rates?

msureshkumar2610

No, I checked all baud rates. different error.

msureshkumar2610

I was checked from 4800.

msureshkumar2610

even if I send 0xEF single byte. that also displaying like this 'i.

neilcsmith_net

That would appear to be correct!? That looks like the letter for that hex code in UTF-8 http://www.utf8-chartable.de/

What are you expecting to see? What is on the receiving end?

msureshkumar2610

I need same bytes. If I send 0xEF then I need same at another end

neilcsmith_net

As I said, it looks like you're receiving the same bytes! How are you receiving and displaying them?

Lord_of_the_Galaxy

And how do you know it isn't? As neilcsmith says, it appears to be correct.

neilcsmith_net

Quick follow up after reading some of your earlier comments. Your initial sequence of bytes is

0xEF,0x01,0xFF,0xFF,0xFF,0xFF,0x01,0x00,0x03,0x01,0x00,0x05

If you ignore the bytes that don't relate to visible characters in UTF-8 then the remaining sequence is

0xEF,0xFF,0xFF,0xFF,0xFF

That as a String is ïÿÿÿÿ That's not a coincidence! ;-)