Example 303 GUI Level Meter

Table of Contents

• Live Demo
• Whole Code

The ShellminatorLevelMeter class is very similar to the ShellminatorProgress class, with the main difference being in its visual representation. In terms of code, the basic usage is almost identical.

Live Demo

Whole Code

/*
 * Created on Aug 10 2020
 *
 * Copyright (c) 2023 - Daniel Hajnal
 * hajnal.daniel96@gmail.com
 * This file is part of the Shellminator project.
 * Modified 2023.05.13
*/
 
#include "Shellminator.hpp"
#include "GUI/Shellminator-Level-Meter.hpp"
 
// Create a Shellminator object, and initialize it to use Serial
Shellminator shell( &Serial );
 
ShellminatorLevelMeter meter( "Audio Level" );
 
uint32_t timerStart = 0;
uint32_t period = 100;
float percentage = 1.0;
float step = 1.0;
 
// System init section.
void setup(){
 
    Serial.begin(115200);
 
    // Clear the terminal
    shell.clear();
 
    Serial.println( "Program Start!" );
 
    shell.begin( "arnold" );
    shell.beginScreen( &meter );
 
}
 
// Infinite loop.
void loop(){
 
    if( ( millis() - timerStart ) > period ){
        timerStart = millis();
        percentage += step;
 
        if( percentage > 100.0 ){
            step = -1.0;
            percentage = 100.0;
        }
 
        if( percentage < 0.0 ){
            step = 1.0;
            percentage = 0.0;
        }
 
        meter.setPercentage( percentage );
 
    }
 
    shell.update();
 
}

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GUI Progress Advanced Example	GUI Level Meter Advanced Example