KY-040 Rotary encoder

Serial.println ("Rotation detected: ");

Serial.print ("Rotational direction: ");

if (Richtung)

{

Serial.println ("Clockwise");

}

else

{

Serial.println("Counterclockwise");

}

Serial.print("Current position: ");

Serial.println(Counter);

Serial.println("------------------------------");

}

// Preparation for the next run:

// The current value will be the last value for the next run.

Pin_clk_Letzter = Pin_clk_Aktuell;

// Reset funciton to save the current position

if (!digitalRead(button_pin) && Counter!=0)

{

Counter = 0;

Serial.println("Position resetted");

}

}

Connections Arduino:

CLK

= [Pin 3]

DT

= [Pin 4]

Button

= [Pin 5]

+

= [Pin 5V]

GND

= [Pin GND]

Code example download

KY-40_rotary-encoder_ARD

Code example Raspberry Pi

The program checks which pin has changed first, to get the rotational direction, after detecting a change at

the pin status. You will get the rotational direction after you compare the current status of the pins with the

last status. After detecting the rotational direction, the steps from the start will be counted and outputted.

Pushing the button of the rotary encoder will reset the current position.

# coding=utf-8

# Needed modules will be imported and configured

import RPi.GPIO as GPIO

import time

GPIO.setmode(GPIO.BCM)

# Declaration and initialisation of the input pins which are connected with the sensor.

PIN_CLK = 16

PIN_DT = 15

Export: 16.06.2017

Copyright by Joy-IT - Published under CC BY-NC-SA 3.0

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