Making serial library work in browser.

Core Library Questions

thinkanish

Making serial library work in browser.

in Core Library Questions • 11 months ago

Hi,

I recently tried to put a simple code to capture a serial data from a microcontroller and display it. When I run the code, it works fine. But when I export it as an applet and use it using the web browser, it doesnt capture the serial data. Any configurations need to be performed for this?

Thanks

EDIT: Also, is there a way to save the images from saveFrame() to different folder other than the project folder?

here is the code:

import processing.serial.*;

int temp;
Serial mfport;
PFont mffont;
void setup(){
mffont = loadFont("davud.vlw");
println(Serial.list());
String cport = "COM23";
mfport = new Serial(this,cport,9600);

}
void draw(){

while(mfport.available()>0){
background(255);
temp = mfport.read();
println(temp);
fill(0);
String par = nf(temp,2,0);
text(par,20,20);
}
}

Replies(3)

PhiLho

Re: Making serial library work in browser.

11 months ago

As I always ask, what is the point of putting such sketch online?
Particularly a sketch where you hard-code the port number.
There are strong chances that the person running the applet won't have the right hardware, and probably not on this port.

Anyway, if you really want to try this, you have to sign the applet, as accessing hardware like this is prevented by normal security rules.

To save the frame to a different folder, just use an absolute path.

thinkanish

Re: Making serial library work in browser.

11 months ago

Hi PhiLho,

Thanks very much for your suggestions. It worked nice.

Sorry My bad, I didnt have a thought of that. My intention is to monitor a serial data in one computer and host it using apache tomcat. But as you said, when the client browser opens the processing applet in their browser, the applet tries to acquire data from the client's com port right? - and thats bad.

can i implement the above scenario using Server client libraries in processing? (processing.net.*)

Thankyou.

PhiLho

Re: Making serial library work in browser.

11 months ago

That's a better option, indeed. You need to have a Processing sketch running on the server, monitoring the port you want, and acting as a server in the Network library sense (or OSC, etc.). And now, the client in the browser can connect to the server to fetch the data and display it. But I think you still need to sign the jars for this communication to work.

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