Using "simulated_audio_pot" with encoder

[nradina]

Hello everyone,

I'm trying to wrap my head around using the excellent volume controls in this amazing library.

I've read through the "SimulatedAudioPot Class Reference" yet I'm unsure how to implement this with a digital rotary encoder.

Are there any code examples that would put me on a better track to implement a rotary encoder to control volume of the AudioKitStream output?

I started with this code yet I'm sure this is not correct nor does it reference the <VolumeControl.h> library.

`/**
@file basic-a2dp-audiokit.ino
@brief see https://github.com/pschatzmann/arduino-audio-tools/blob/main/examples/examples-audiokit/basic-a2dp-audiokit/README.md

@author Phil Schatzmann
@copyright GPLv3
*/

#include "AudioTools.h"
#include "AudioLibs/AudioKit.h"
#include "AudioLibs/AudioA2DP.h"
#include <Rotary.h>

// Pin definitions for the rotary encoder
#define ROTARY_ENCODER_A 21
#define ROTARY_ENCODER_B 22

// The rotary encoder object
Rotary rotaryEncoder = Rotary(ROTARY_ENCODER_A, ROTARY_ENCODER_B);

BluetoothA2DPSink a2dp_sink;
AudioKitStream kit;

// Write data to AudioKit in callback
void read_data_stream(const uint8_t *data, uint32_t length) {
kit.write(data, length);
}

void setup() {
Serial.begin(115200);
AudioLogger::instance().begin(Serial, AudioLogger::Info);

// setup output
auto cfg = kit.defaultConfig(TX_MODE);
cfg.sd_active = false;
kit.begin(cfg);

// register callback
a2dp_sink.set_stream_reader(read_data_stream, false);
a2dp_sink.start("AudioKit");
}

void loop() {
kit.processActions();

// Get the number of steps taken by the encoder
int steps = rotaryEncoder.process();

// check if steps !=0
if (steps) {
// Check the direction of rotation and call the appropriate function
if (steps > 0) {
// Rotate clockwise
for (int i = 0; i < steps; i++) {
kit.incrementVolume();
}
} else {
// Rotate counterclockwise
for (int i = 0; i < -steps; i++) {
kit.decrementVolume();
}
}
}
delay(10);
}

'

[pschatzmann]

kit.setVolume(), incrementVolume(), decrementVolume() is using the built-in volume functionality of the Audiokit.
You should not add any delay in the loop because this might disturb the audio output.
Why didn't you just use kit.incrementVolume(steps); I would expect that this should work correctly both for positive and negative values...

[nradina]

Thank you, Phil. In order to use "kit.incrementVolume(steps);" with an encoder, do I need to include an encoder library or is this not necessary with your library?

[pschatzmann]

I never used any Rotary Encoder myself and have no functionality for this in my library.
So yes you need to use an external library...