Can't get rotary encoder direction with RotaryEncoder.h library

Projects Programming
1

Hello everyone,
I've been trying to get the direction of my rotary encoder and print it in the serial monitor using the RotaryEncoder.h library and this code:

#include <RotaryEncoder.h>

RotaryEncoder encoder(2,3);

void setup() {
 
Serial.begin(9600);

}

void loop() {
  
encoder.tick();
int8_t dir = encoder.getDirection();
Serial.println(dir);
}

when I compile it I get this error: "exit status 1
cannot convert 'RotaryEncoder::Direction' to 'int8_t {aka signed char}' in initialization"

What have I done wrong?
Thank you!

2

getDirection returns a value of type Direction, not int8_t

from https://github.com/mathertel/RotaryEncoder/blob/master/RotaryEncoder.h

enum class Direction { NOROTATION = 0, CLOCKWISE = 1, COUNTERCLOCKWISE = -1};

Direction getDirection();

you need to use the values: NOROTATION, CLOCKWISE, COUNTERCLOCKWISE

3

Thank you for your reply! :wink:
So how should I declare the variable (dir) that I'm using for the direction in my sketch?

4 
Direction dir = encoder.getDirection();
5

by using Direction dir = encoder.getDirection(); I get: " 'Direction' was not declared in this scope ".

If I understood correctly, "Direction" should be a variable type for the library, but it isn't recognized by the IDE right?

6

The Direction enum is part of the RotaryEncoder class. For this reason, it should be:

RotaryEncoder::Direction dir = encoder.getDirection();
1 Like
7

Thank you for your answer
By using this instruction I don't get any error anymore! But if I want to print the value on the monitor I get the error: " no matching function for call to 'HardwareSerial::println(RotaryEncoder::Direction&)' ".
If I try to put

if(dir==1)
{Serial.println("ok")}

I get the error: "no match for 'operator==' (operand types are 'RotaryEncoder::Direction' and 'int')"
So what I think it means is that the output of "dir" can't be compared with an int number since it's a library own "variable type". Can't I get a direction variable that is an int or some other Arduino language type variable? Hope I haven't made any stupid error :smiley:

8 
if (dir == RotaryEncoder::Direction::CLOCKWISE) {
.
.
}
9

Thanks a lot to all of you for troubleshooting! :wink: :smiley: