Problems with readStringUntil

GuyGauthier

Hi everybody,

When I try to use the instruction "readStringUntil" it's seems to not working, even when I try some examples found on the Web.

Is it possible this instruction don't work on a Windows environment ?

Thank you for the information....

PhiLho

Well, if there is no bug opened about this, it is probably a problem on your system or your attempts.

GuyGauthier

Thank you PhiLho for your answer.

To be clearer here is the message I had received : > "The function readStringUntil(short) does not exist".

Here is the code I had tested and generated this error (as all other codes using the readStringUntil instruction) :

// Processing Sketch to read comma delimited serial

// expects format: H,1,2,3,

import processing.serial.*;

Serial myPort; // Create object from Serial class

char HEADER = 'H'; // character to identify the start of a message

short LF = 10; // ASCII linefeed

// WARNING!

// If necessary change the definition below to the correct port

short portIndex = 3; // select the com port, 0 is the first port

void setup() {

size(200, 200);

println(Serial.list());

println(" Connecting to -> " + Serial.list()[portIndex]);

myPort = new Serial(this,Serial.list()[portIndex], 9600);

}

void draw() {

}

void serialEvent(Serial p)

{

String message = myPort.readStringUntil(LF); // read serial data

if(message != null)

{

print(message);

String [] data = message.split(","); // Split the comma-separated message

if(data[0].charAt(0) == HEADER && data.length > 3) // check validity

{

for( int i = 1; i < data.length-1; i++) // skip the header & end if line

{

println("Value " + i + " = " + data[i]); // Print the field values

}

println();

}

}

}

This code comes from page 105 of the "Arduino Cookbook, Second Edition by Michael Margolis".

GuyGauthier

Did I am the only user of Processing to have received this message: "The function readStringUntil(short) does not exist" ?

I use Processing 2.1 on Windows 7.

Razorblade

New 2.1 serial library is buggy.

Not only they forgot to add readStringUntil() method, but also serialEvent() and receiving data are not working properly, so better roll back to 2.0.3.

REAS

readStringUntil() is now in the source on Github for the next release. @Razorblade, I don't think we have bug reports about serialEvent() in 2.1 on Github. Please let us know what is not working for you.

Razorblade

Thanks for your answer REAS.

I wish I knew how to describe the problem, so I could make a bug report. The thing is that serial code working in 2.0.3, doesn't work in 2.1. It seems to hang when it has to receive serial data, as if it were no input data.

I'm on Windows 8 x64, same behaviour with Processing 2.1 32 and 64. I'm sorry I have no time to test it on other platforms, or test in detail.