Controling a Servo using Processing & Arduino

Projects Interfacing w/ Software on the Computer
1

Good day,

Im a bit of a novice and for a school project we are required to make a servo move using Processing and using port.write('value'); to send data from processing to arduino ide.

Would anyone be able to share some insight into what is wrong with my code ?

#include <Servo.h>

#include <LiquidCrystal_I2C.h>
#include <Wire.h>

Servo myservo;


char val;

void setup() {
 
  Serial.begin(9600);
  myservo.attach(9);
  
 
}

void loop() {
  if (Serial.available()) {
    // read the incoming byte:
    val = Serial.read();
  }

    if (val == '1') { // 1 = value that is comming from processing
  
    myservo.write(100);
    delay(1000);
  
  }
  else if (val == '2' ){
   
    myservo.detach()
    
  }
}

My processing code is simple,

void mousePressed() {
  if(mouseX > 500){
  port.write('1');
  print("yes");
  }
  else if (mouseX < 500){
    port.write('2');
    print("no");
  }
  
}

Just sending a 1 or 2 when the mouse is pressed at a certain position on the Canvas. My port assignment and Com is all correct i just dont understand why Arduino is not reading the incoming bytes.

Thanks for your help !
2

Fixed .

Did you test your Arduino code using the serial monitor?

3

Why do you think Arduino doesn't read incoming bytes? To be sure, do as @anon73444976 advised you, but I think it might be more convenient to use the LCD display (you have #include <LiquidCrystal_I2C.h> in the program). For me, Arduino does what you program it - nothing. Oh, yes, when the Arduino first gets 1 it will move the servo motor to position 100 and that's it. That's what your program does. What you want Arduino to do is another matter and you have not explained.

4

What does it do that you don't expect? Or what doesn't it do that you expect it to do?

5

The tricky bit here is you can not run the arduino serial monitor and processing at the same time, since you are connecting to the serial monitor. I appreciate the feedback.

6

Im trying to make a the 360 servo rotate, i attached a screw to it, and im trying the have the screw turn x degrees, stop, turn the otherway, etc etc, thanks for the response

7

The suggestion is that you dispense with processing for now so you have a single piece of code to debug.