String Headache

YORKIE

Hi Guys, I have a string coming from a navigation PC, containing an easting and northing. The string being sent looks exactly like this:

E238620.31 N2829868.73 FP 238620.31<CR><LF>

Now the string works on another system ( a video overlay system), so I know its there, but I would like to work with it in Processing, and I can't for the life of me see it. I just keep getting "null"

Something tells be it could have something to do with the CR and LF I cant change the string at all that is what it is.

Ive been going down the route of >>>>> String inBuffer = myPort.readString();

Any help would greatly be appreciated.

Cheers

Nik

Chrisir

Post entire code

Do you get the the data via usb?

YORKIE

import processing.serial.*;

Serial myPort;

void setup() {
  size(200, 200);
//printArray(Serial.list());

  String portOne = "COM1";
 myPort = new Serial(this, portOne, 9600);

} 

void draw() {
while (myPort.available() > 0) {
String inBuffer = myPort.readString();

println(inBuffer);

}
}

kfrajer

Check these:

https://forum.processing.org/two/discussion/16618/processing-with-arduino-void-serialevent#Item_1

https://forum.processing.org/two/discussion/22732/how-do-i-split-an-incoming-6-value-string-into-separate-variables/p1

Kf

YORKIE

Thanks Kf,

But I'm pretty up to speed with the data - When I get it..

I'm simply not receiving it, almost like processing doesn't recognize the format of the string, maybe its the parity, stopbits, even the baud rate maybe wrong.

YORKIE

I'm using a windows 7 machine at work, and notice they no longer to Hyperterminal.

Is there another program, whereby I can physically check weather the string is actually coming into my computer first?

kfrajer

You are reading a string... but if you are processing bytes then maybe string is not the right way to handle the data. You can see what bytes arrive in processing if you do this:

void draw() {

  if(myPort.available() > 0) {
     //https://processing.org/reference/libraries/serial/Serial_read_.html
     byte inByte = myPort.read();
     print("\t0x"+hex(inByte,2));
   }
}

Also use printArray(Serial.list()); to check what com port your device is using. Run the command before and after you access the port from your navigation PC. If the port is not open properly, I will expect to have some sort of error message.

Kf

YORKIE

Thanks Kf, I think my comms port may be duff. I have data coming in on another port from another machine, and can get that no problem. I may try switching the ports.