Description:

This is a device that simply calculates macro-nutrients and converts them into a caloric value. A single rotary encoder with a button changes states of the device from editing the values to selecting them. A button on the right sets the goal for each value I would like to reach.

In this video, I show operation of the device. I press the rotary button twice to enter calorie edit mode turn the dial to the right to add some calories. Then I hold the button down to confirm my selection which takes me back to the main menu.

Process

Discussion

This was a difficult project. Not because it was a hard problem or device to make, it was difficult because I did not believe in my ability's. It was a mixture of self doubt, and disinterest. During Ideation, I experienced difficulties coming up with a project idea that was interesting to me. I would have rather used someone else's design and modified it to make it my own. I would build it from scratch, just with some guide lines. These thoughts and doubts led to me procrastination, till I had only 3 days to whip something up. I did and I'm shocked with how it turned out.

Compared to the first project, I had a clear difficulties keeping myself in check. Having a partner helps demystify and problem solve. Coming into the lab helped simulate that same experience as everyone during the final two days was bouncing ideas / solutions to problems. It was a nice sight to see.

In the end, I was happy others liked the design of my device. I had some complaints about the position of the screen / how one holds the box while interacting with it. I would have changed the screen to angle up at a 45 degree so the user would not have to crouch to see the screen if it were on a table. I would like to have the macro nutrient conversions working as well, as it is only a calorie tracker in it's current form. A SD card for keeping track of information logged in the past would also be useful.

#include <EasyButton.h>

#include <EasyButtonBase.h>

#include <EasyButtonTouch.h>

#include <EasyButtonVirtual.h>

#include <Sequence.h>

#include <Encoder.h>

#include <LiquidCrystal_I2C.h>

//Title: Calorie Counter

//By: Evan Alexander

///Description///

//This block of code operates two devices. A 2x16 LCD and a Rotary encoder and a Arduino Uno.

//On a high level this runs a main function to display your 3 macros (proteins, fats, carbs)

//and a caloric value.

//Credits//

//The "EasyButton" library was used heavily in this project. Check them out at: https://easybtn.earias.me/

//The "Encoder" library was used for seamless use. Library found at: https://www.pjrc.com/teensy/td_libs_Encoder.html

//The "LiquidCrystal_I2C" library was used to access the liquid crystal display: https://github.com/johnrickman/LiquidCrystal_I2C

//Pin Mapping//

// SCL and SDA plug into the Pack of the LCD Display

// 2 ~3 and 4 all are used for the rotary encoder.

//Code released to the public domain by the author: 3/20/24

//Deffined Global Variables:

Encoder myEnc(2, 3);

LiquidCrystal_I2C screen(0x27, 16, 2);

unsigned long tickTimer = 0;

const int tickWait = 200;

long Calories;

long Protein;

long Fats;

long Carbs;

long additionNumber;

#define BUTTONPIN 4

EasyButton encoderButton(BUTTONPIN);

void setup() {

  Serial.begin(9600);

  Serial.println("Start");

  //Screen Initialization

  screen.init();

  screen.display();

  screen.backlight();

  screen.home();

}

//Number Declairations

long oldPosition = -999;

void loop() {

  Main();

  encoderButton.read();

  DubblePressToCalorieChange();

}

void Main() {

  //Positioning of encoder. If this was not here

  //It would take one noch on the encoder as 4 isntead of one.

  long newPosition = myEnc.read() / 4;

  if (newPosition != oldPosition) {

    oldPosition = newPosition;

    Serial.println(newPosition);

  }

  //Section: Display function:

  if ((millis() - tickTimer) >= tickWait) {

    screen.clear();

    //Display Calories

    screen.setCursor(4, 0);

    screen.print("Cal:");

    screen.setCursor(10, 0);

    screen.print(Calories);

    //Display Protein

    screen.setCursor(0, 1);

    screen.print("P:");

    screen.setCursor(2, 1);

    screen.print(Protein);

    //Display Fats

    screen.setCursor(5, 1);

    screen.print("F:");

    screen.setCursor(7, 1);

    screen.print(Protein);

    //Display Carbs

    screen.setCursor(10, 1);

    screen.print("C:");

    screen.setCursor(12, 1);

    screen.print(Protein);

    tickTimer = millis();

  }

}

void DubblePressToCalorieChange() {

  //Changes state from the main to ChangeCal()

  encoderButton.onSequence(2, 1000, ChangeCal);

}

void ChangeCal() {

  bool stayInState = false;

  Serial.println("!!!!I have changed states!!!!");

  do {

    encoderButton.read();

    Serial.println("I'm staying in this state!");

    stayInState = encoderButton.pressedFor(1000);

    //EncoderMovement

    long newPosition = myEnc.read() / 4;

    if (newPosition != oldPosition) {

      oldPosition = newPosition;

      additionNumber = newPosition;

      Serial.println(newPosition);

    }

    //Display calories

    if ((millis() - tickTimer) >= tickWait) {

      screen.clear();

      //Display Calories

      screen.setCursor(1, 0);

      screen.print("Change Cal:");

      screen.setCursor(13, 0);

      screen.print(Calories);

      screen.setCursor(7, 1);

      screen.print(newPosition);

      tickTimer = millis();

    }

  } while (stayInState == false);

  Calories = (Calories + additionNumber);

  screen.println("added Number");

}