I downloaded the Processing language and ran the "Hello World" program to test it. The message appears in the Serial console but not on the Processing console. It prints "null" only. I am using the code supplied by Sparkfun. Other people have had this problem. I am looking for clear explanation and solution.
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I apologize for presenting a vague question. I was unable to successfully run the simple code to learn "serial communication" presented by Sparkfun on: https://learn.sparkfun.com/tutorials/connecting-arduino-to-processing. Step 1. Run Arduino to produce "Hello, World" on the Serial Port. Step 2. Run Progressing 3.0.1 to produce "Hello, World" on its console. The code from the website are copied and pasted onto my iMac running El Capitan. I received an error message for Step 2 stating the "port is busy." Once I closed the Arduino (Step 1) and compiled and ran Step 2, it worked! Several other people found different solutions. My solution is simple. Run one program at a time. |
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