Arduino Rotary Encoder Pulses?

Question

I made an program so if I turn on my rotary encoder the position and the rotation comes on a LCD screen. But I need to change it a bit up for my teacher, she wants to see the graph of the pulses on the serial monitor. I searched it up and can't find a solution? Any help?

My program:

#include <LiquidCrystal_I2C.h> 
LiquidCrystal_I2C lcd(0x27,16,2); 
#define outputA 2 
#define outputB 4 
int counter = 0; 
int angle = 0; 
int aState; 
int aLastState; 
int lastAngle = 0; 
String rotationDirection; 
String savedRotationDirection;
void setup() {
 pinMode (outputA,INPUT);
 pinMode (outputB,INPUT);
 aLastState = digitalRead(outputA);
 lcd.begin();
 } 
void loop() {
 aState = digitalRead(outputA);
 if (aState != aLastState){ 
 if (digitalRead(outputB) != aState) { 
 counter ++;
 angle ++;
 }
 else {
 counter--;
 angle --;
 }
 if (counter >=30 ) {
 counter = 0;
 } 
 if (angle < lastAngle){
 rotationDirection = "CCW";
 }
 else {
 if (angle > lastAngle){
 rotationDirection = "CW";
 }
 else {
 rotationDirection = savedRotationDirection;
 }
 }
 lcd.clear();
 lcd.setCursor(0,0);
 lcd.print("Position: ");
 lcd.print(int(angle)*(-1));
 lcd.print((char)223); 
 lcd.setCursor(0,1);
 lcd.print("Rotation: ");
 lcd.print(rotationDirection);
 savedRotationDirection = rotationDirection;
 lastAngle = angle;
 }
 aLastState = aState;
}

• Jaromanda X: My program: is hard to read formatted like that
• Juraj: almost every Arduino example uses prints to Serial Monitor
• jsotola: I searched it up ... what did you search for?
• Edgar Bonet: Just a few comments on your code: 1. You can remove counter, as you never use it. 2. aState and rotationDirection should be local variables. 3. savedRotationDirection serves no useful purpose: you can just remove every line in which it appears. 4. lastAngle is not useful either: you know the angle increases when you do angle++, and it decreases when you do angle--.

Answer 1

Add Serial.begin(115200); in setup() and use Serial.println() or Serial.print() to print to Serial.

In Arduino IDE open Serial Monitor and set baud rate to 115200.

EDIT: The question turned out to be about Serial Plotter. Maximilian Gerhardt answered in a comment :

If you want multiple data streams (graphs) you need to seperate them by a comma: Serial.println( String(digitalRead(outputA)) + "," + String(digitalRead(outputB)));

• user43154: Nothing's happening. My question is how to see the graph of the pulse in the serial monitor?
• Juraj: Serial Plotter in IDE?
• user43154: Used it but still nothing happens.
• user43154: Used this: Serial.println(digitalRead(outputA)); Serial.println(digitalRead(outputB)); Now I only get one of the 2. Is there a way to get both but under eachother?
• Maximilian Gerhardt: If you want multiple data streams (graphs) you need to seperate them by a comma: Serial.println( String(digitalRead(outputA)) + "," + String(digitalRead(outputB))); (norwegiancreations.com/2016/01/…) @user43154