So I am brand new to arduino. I have put together a few different projects found online to meet my need. I am assuming the code is not very neat or efficient but it does work how I need it to.
I am using an a generic NANO to run the code.
I have a rotary encoder that moves a servo between 0-65 degrees. The current angle is then displayed on a ssd1306 display. I would like the display to show a 0-100 percent instead of the 0-65 degree angle. I think I can use a map function but dont really understand how for the rotary encoder. I did it when I used a Variable pot but this seems different.
Someone may also be able to help make the code run more efficiently. when I just use the rotary encoder to adjust the servo it moves smoothly. When I added the oled display it made the encoder move one degree at a time so I added the millis function to refresh the display less. That helped some but its still slightly rough and the encoder doesn't seem to be as precise
Also I know there is a spelling mistake but its from code I borrowed and never corrected it.
Thanks in advance.
Here is my code
#include <Servo.h>
#include <Adafruit_SSD1306.h>
#include <Wire.h>
#include <SPI.h>
#include <Encoder.h>
const int SW_PIN = 4;//define a pin for rotary encode switch
const int PIN_A =2;
const int PIN_B =3;
//oled refresh milis setting
const unsigned long eventInterval = 1000;
unsigned long previousTime = 0;
// Change these two numbers to the pins connected to your encoder.
// Best Performance: both pins have interrupt capabilitym
// Good Performance: only the first pin has interrupt capability
// Low Performance: neither pin has interrupt capability
Encoder myEnc(2, 3);
// avoid using pins with LEDs attached
const int home = 65; //initial position
const int homePosition = 65; //initial position
const int stepValue = 1;//how fast the servo should rotate when turning the knob
const int servoPin = 9;//~must be a pin that that is labeled with ~
Servo myservo; // create servo object to control a servo
int servoAngel =homePosition;
#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);
/*
* PIN connection:
* pin connection see: https://www.arduino.cc/en/Reference/Wire
* for UNO: SDA to A4, SCL to A5
* VCC to 5V
* GND to GND :-)
*/
// this is the Width and Height of Display which is 128 xy 32
#define LOGO16_GLCD_HEIGHT 32
#define LOGO16_GLCD_WIDTH 128
void setup() {
Serial.begin(9600);
pinMode(SW_PIN, INPUT);
Serial.println("Basic Encoder Test:");
myservo.attach(servoPin); // attaches the servo on pin
myservo.write(servoAngel);//move servo to initial position
display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
display.display();
display.clearDisplay();
display.setTextSize(2);
display.setTextColor(WHITE);
}
long oldPosition = -999;
void loop() {
long newPosition = myEnc.read();
if (newPosition != oldPosition) {
if(newPosition > oldPosition)
{
int newStep = abs(newPosition - oldPosition);
Serial.print("Angle ");
Serial.println(servoAngel);
servoAngel -= stepValue;
if(servoAngel <0)
servoAngel =0;
myservo.write(servoAngel); //move servo to new angel
}
if(newPosition < oldPosition )
{
int newStep = abs(newPosition - oldPosition);
Serial.print("Angle ");
Serial.println(servoAngel);
servoAngel += stepValue;
if(servoAngel >65)
servoAngel =65;
myservo.write(servoAngel); //move servo to new angle
}
oldPosition = newPosition;//remember the new position
}
/* Updates frequently */
unsigned long currentTime = millis();
/* This is screen refresh */
if (currentTime - previousTime >= eventInterval) {
/* Event code */
Serial.println("refresh screen");
/* Update the timing for the next time around */
previousTime = currentTime;
display.clearDisplay();
display.setCursor(0,0);
display.setTextSize(2);
display.println(" Angle");
display.setCursor(80,0);
display.setTextSize(4);
display.println(servoAngel);
display.display();
}
if( digitalRead(SW_PIN) == LOW)
{
Serial.print("Home: ");
Serial.println(homePosition);
servoAngel =home;
myservo.write(servoAngel); //move servo to new angle
}
}
