Talking to Arduino serial port on Mac Mavericks

brucehughw

Hello. I get this warning in a simple Processing sketch:

WARNING: RXTX Version mismatch Jar version = RXTX-2.2pre1 native lib Version = RXTX-2.2pre2

Can someone please tell me how to fix this. I cannot see the serial monitor in Processing and, therefore, cannot use it to read Arduino's output. There's an old thread on this topic, but the instructions do not match what I see in the Arduino and Processing (version 1.5.1) directory trees. Thanks.

srinag

Enclose your code/errors within <pre> and </pre> as mentioned here.

srinag

Most probably you will have to update your serial package. But it is just a warning so your code should work fine irrespective of the warnings. There is no serial monitor in Processing. Please show your code to help "fix" it.

srinag

Most probably you will have to update your serial package. But it is just a warning so your code should work fine irrespective of the warnings. There is no serial monitor in Processing. Please show your code to help "fix" it.

brucehughw

Hi, thanks for following up on my post.

Here is my code in the setup section:

 void setup(){
 size(200,200);
 println(Serial.list());
 String arduinoPort = Serial.list()[3];
 println(arduinoPort);
 port = new Serial(this, arduinoPort, 9600); //remember to replace COM20 with the appropriate serial port on your computer
 print("port available");
 print(port.available());
}

Processing's console writes: I'm running the latest version of Processing on a Mac. Not sure what else to try. I've changed the numbers in

String arduinoPort = Serial.list()[3];

and "3" is the only number the code even attempt to run.

Thanks for the help, Bruce

brucehughw

Hi, again.

I think i fixed it. I changed the setup code to communicate with the correct serial port:

 void setup(){
 size(200,200);
 println(Serial.list());
 String arduinoPort = Serial.list()[2];
 print("Arduino Port is",arduinoPort);
 port = new Serial(this, arduinoPort, 9600); 
 print("port available");
 print(port.available());
}
 
 

I also had to quit Arduino software and free up the serial port, even though the sketch is running on the Arduino board. So, I think I'm all set for now.

Thanks, Bruce