[SOLVED] Problems sending data from Processing to Arduino through serial port

[bacum]

Thanks again for your inputs, guys!

@RichardDL

In your latest Ard IDE image you are using the Serial monitor (SM) to see the Serial.prints from the Ard sketch. This is good for testing the sketch, but you must close the SM before your Processing sketch can connect to the Ard’s serial port. Only one thing at a time can use the port. Load sketch, SM, Processing. The IDE manages load and SM, but when you start connecting Processing you have to mange the situation. When Processing is connected to Ard you can’t see the Ard’s prints unless you add Processing code to do it. That’s why in my example I used LEDs to show the action.

I was using the SM as you say, I didn’t know that I cannot use it to visualize the data sent from Processing, just now I understand your LEDs example. I will mount it today to try the communication.

On the other hand, I was indicating the serial port wrong in Processing, I think there was the problem.

@glv

You may want to start here:
Connecting Arduino to Processing - SparkFun Learn

Great input too, with this I had had to detect my error with the serial port assigned in Processing. The communication Arduino-Processing works well, now I will try in the other direction.

Thanks again, I will tell you my advances later;)