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Functions

• Encoder encoder()

• Encoder.begin()

• Encoder.read()

• Encoder.limitedRead()

• Encoder.setPosition()

• Encoder.setDirection()

• Encoder.getDirection()

• Encoder.scale()

• Encoder.motion()

• Encoder.lastMotionSince()

• Encoder.setDebounceTime()

Encoder encoder()

Description

Sets up the pins. If the value goes up for the wrong direction of rotation then flip the pins:

//value goes up for CW
Encoder encoder(4, 5);

//value goes up for CCW
Encoder encoder(5, 4);

Parameters

• CLK_pin - CLK pin of the encoder

• DT_pin - DT pin of the encoder

Example

//Set the pins of the encoder
Encoder encoder(4, 5);

Encoder.begin()

Description

Initializes the library.

Parameters

• none

Example

//initialize the library
encoder.begin();

Encoder.read()

Description

Returns an integer that can be changed by the rotary encoder.

Parameters

• none

Example

//Returns the value
encoder.read();

Encoder.limitedRead()

Description

Returns an integer that can be changed by the rotary encoder but can be given a lower and an upper limit.

Parameters

• int Minval - lower stop

• int Maxval - upper stop

Example

//Returns the value constrained between 0 and 10
encoder.limitedRead(0, 10);

Encoder.setPosition()

Description

Sets the value of the encoder to the pos parameter and returns HIGH if succesful else it returns LOW.

Parameters

• int pos - the position to set the encoder value to

Example

//sets the position of the encoder to zero
encoder.setPosition(0);

//if succesful at setting the value to zero it will print "1"
Serial.println(encoder.setPosition(0));

Encoder.setDirection()

Description

Sets the direction of the encoder used for incrementing/decrementing the output.

Parameters

• bool direction - can flip the direction of the encoder from the software side. Default value is false.

Example

//flips the input direction
encoder.setDirection(true);

//flips input direction back
encoder.setDirection(false);

Encoder.getDirection()

Important

This function hasn't been release yet, it's planned for version 2.5.0, which should release until the end of March 2026

Description

returns the current software direction of the encoder instance.

Parameters

none

Example

//print the current software direction
Serial.println(encoder.getDirection());

//flips encoder software direction
encoder.setDirection(!encoder.getDirection());

Encoder.scale()

Description

Sets increments of the output

Parameters

• int scale - the amount the position changes per click

Example

//sets the scaling to 10
encoder.scale(10);

Encoder.motion()

Description

Returns true when the encoder was moved and keeps its value until it gets called, after that it goes back to false

Parameters

• none

Example

//checks for motion
if(encoder.motion()) {  //only print the value of the encoder if it was moved
  Serial.println(encoder.read());
}

Encoder.lastMotionSince()

Description

returns true if the encoder has not had any motion for more than the amount of time you set.

Parameters

• int noMotionTime - the time of no motion required to return true

Example

//sets the position of the encoder to zero
encoder.setPosition(0);

//if succesful at setting the value to zero it will print "1"
Serial.println(encoder.setPosition(0));

Encoder.setDebounceTime()

Description

Sets the time waiting between checking the encoder's pins

Parameters

• int debounce_time

Example

//sets the debounce time to 2 milliseconds
encoder.setDebounceTime(2)
}