/* I was unhappy with the examples for rotary encoder code i was finding online, They were either too simple or too complex so i am sharing some code that includes things like...... Debouncing. Nonblocking. (dose !not hold up other code with delays) Button hold time. (how long the button was pushed in seconds) Dynamic min & max values, & start position for the encoder.(change values at any time) HIDTriggerTime = Human interface time, (it saves the last time a human touched a control (for screen time out events, ect)) I hope some1 finds this useful!!! Tested with Diymore rotary encoder [Diymore encoder] So here you go world, you can use this code as you see fit. just copy & past this whole post into a arduino project. */ // rotary encoder By Richard Greene const int PinA = 2;// Pin A for the encoder const int PinB = 3;// Pin B for the encoder const int PinButton = 4;// Used for the push button int EncoderPosition = 0;// The current position of the encoder int EncoderMaxPosition = 10; // Max number of the encoder int EncoderMinPosition = 0; // Min number of the encoder unsigned long HIDTriggerTime = 0; // the last time a person touched the controls void setup() { Serial.begin(9600); SetRoteryEncoder(-100,100,10);//set the (min, max, start) values of the rotery encoder } void loop() { long ButtonHoldTime = DoRoteryButton();//read the button if (ButtonHoldTime 0)//when the botton is released , time it was held in seconds {//when the botton is released code here Serial.print("Hold Time(S) = "); Serial.println(ButtonHoldTime); } static int LastEncoderPosition; int CurrentEncoderPosition; CurrentEncoderPosition = DoRoteryEncoder(); if (LastEncoderPosition != CurrentEncoderPosition) { Serial.print("EncoderPosition = "); Serial.println(CurrentEncoderPosition); LastEncoderPosition = CurrentEncoderPosition; } } long DoRoteryButton() { static unsigned long HumanInterfaceTime = 0; unsigned long debounceDelay = 50; // the debounce time; increase if the output flickers static unsigned long lastDebounceTime = millis(); // the last time the output pin was toggled static unsigned long ClickTime = millis(); unsigned long Back = 0; static int buttonState = HIGH;; // the current reading from the input pin static int lastButtonState = HIGH; // the previous reading from the input pin int ButtonReading = digitalRead(PinButton);// read the state of the switch into a local variable: if (ButtonReading != lastButtonState) { lastDebounceTime = millis();// reset the debouncing timer } if ((millis() - lastDebounceTime) > debounceDelay) //debounce delay { if (buttonState == LOW) // while the button is being held { Back = millis()-ClickTime; Back = (Back / 1000 +1) ; Back = -Back; } if (ButtonReading != buttonState) // has the button state changed { buttonState = ButtonReading; if (buttonState == HIGH) //button Release { Back = millis() - ClickTime; Back = (Back / 1000) + 1; } else if (buttonState == LOW) // button held down { ClickTime = millis(); } HumanInterfaceTime = millis();// Keep track of when a person touched the button } } lastButtonState = ButtonReading;//update last button state return Back; } void SetRoteryEncoder(int MinIndex, int MaxIndex, int StartIndex) { EncoderMinPosition = MinIndex; EncoderMaxPosition = MaxIndex; EncoderPosition = StartIndex; } int DoRoteryEncoder() { bool RoteryEncoderAState; bool RoteryEncoderBState; static bool LastRoteryEncoderAState = digitalRead(PinA); static bool LastRoteryEncoderBState = digitalRead(PinB); static unsigned long LastInterruptTime = 0; unsigned long InterruptTime = millis(); if (InterruptTime - LastInterruptTime > 1) //(debounce) if (X) amount of time has not passed then skip this { LastInterruptTime = InterruptTime;// Keep track of when we were here last for debounce loop RoteryEncoderAState = digitalRead(PinA); // Reads the "current" state of PinA RoteryEncoderBState = digitalRead(PinB); // Reads the "current" state of PinB if ((RoteryEncoderAState + RoteryEncoderBState == 2) && (LastRoteryEncoderAState + LastRoteryEncoderBState != 2))// this is a test to see if you are turning the encoder to the last state { int ChingeDir = LastRoteryEncoderBState - LastRoteryEncoderAState;//calculate the direction the encoder turned EncoderPosition = EncoderPosition + ChingeDir;//change the Encoder Position by 1 or -1 EncoderPosition = min(EncoderMaxPosition, max(EncoderMinPosition, EncoderPosition));// limits the min and max size of output HIDTriggerTime = InterruptTime;// Keep track of when a person touched the Encoder } if ( RoteryEncoderAState != LastRoteryEncoderAState) { LastRoteryEncoderAState = RoteryEncoderAState;// Update the last state } if ( RoteryEncoderBState != LastRoteryEncoderBState) { LastRoteryEncoderBState = RoteryEncoderBState;// Update the last state } } return EncoderPosition; }

Hello Does this Libary runs with serval encoders?

the Encoder library available in Library Manager is good

[image] paulpaulson: Does this Libary runs with serval encoders? Yes (if the question was about my link) Encoders have 2 signals, which must be connected to 2 pins. There are three options. Best Performance: Both signals connect to interrupt pins. Good Performance: First signal connects to an interrupt pin, second to a non-interrupt pin. Low Performance: Both signals connect to non-interrupt pins, details below.

Thank you for your detailed reply.

Good Rotary Encoder code

Other Hardware 3rd Party Boards

J-M-L August 6, 2021, 5:09am 2

Hello, do yourself a favour and please read How to get the best out of this forum and modify your post accordingly (including code tags).

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I would recommend this encoder library

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Good Rotary Encoder code

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