Mini Info Screen for a car

kymera · Sep 6, 2024

Hi y'all, a while ago I started to restore an old car and I am trying to add some modern features to the best of my abilities. My car has only one screen and it only shows time. I wanted to display time and temperature and voltage readings from various sensors using an arduino uno with a 128x32 OLED screen. I was able to get only this far. My code was freezing constantly for some reason unknown to me , so I changed it and now it does not refresh the values coming from sensors. I am new to programming as a hobbyist and I would greatly appreciate any help. You can show me new horizons to code better. Cheers!

Mini_Info_Screen:

#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
#include <SPI.h>
#include <Wire.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <Smoothed.h>
#include <virtuabotixRTC.h>
#include <Math.h>

#define ONE_WIRE_BUS 2

OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 32
#define OLED_RESET -1        // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C  ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);



#define ic A1
#define anaButon 5
#define upButon 4
#define downButon 3
#define voltajV A0

#define Page_Count 6
int lastPage;
int currentPage = 0;

virtuabotixRTC myRTC(7, 8, 9);


Smoothed<float> voltaj_olcum;
Smoothed<float> ic_olcum;
Smoothed<float> dis_olcum;
float I1;
float D1;

int ic_sic;
int dis_sic;
int t_ic;
float R1 = 10000;
float logR2, R2, T;
float c1 = 1.009249522e-03, c2 = 2.378405444e-04, c3 = 2.019202697e-07;

//Tarih ayarları

int saat = 7;
int dakika = 25;

const unsigned char celica[] PROGMEM = {
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x0f, 0x80, 0x1f, 0xe0, 0x06, 0x00, 0x03, 0x00, 0x03, 0xe0, 0x00, 0xe0, 0x00, 0x00,
  0x00, 0x00, 0x1f, 0x80, 0x1f, 0xe0, 0x06, 0x00, 0x03, 0x00, 0x07, 0xe0, 0x00, 0xe0, 0x00, 0x00,
  0x00, 0x00, 0x39, 0x80, 0x18, 0x00, 0x06, 0x00, 0x03, 0x00, 0x0e, 0x60, 0x00, 0xe0, 0x00, 0x00,
  0x00, 0x00, 0x70, 0x00, 0x18, 0x00, 0x06, 0x00, 0x03, 0x00, 0x1c, 0x00, 0x01, 0xb0, 0x00, 0x00,
  0x00, 0x00, 0x60, 0x00, 0x18, 0x00, 0x06, 0x00, 0x03, 0x00, 0x18, 0x00, 0x01, 0xb0, 0x00, 0x00,
  0x00, 0x00, 0xe0, 0x00, 0x18, 0x00, 0x06, 0x00, 0x03, 0x00, 0x38, 0x00, 0x01, 0xb0, 0x00, 0x00,
  0x00, 0x00, 0xc0, 0x00, 0x18, 0x00, 0x06, 0x00, 0x03, 0x00, 0x30, 0x00, 0x01, 0x30, 0x00, 0x00,
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  0x00, 0x00, 0xc0, 0x00, 0x1f, 0xc0, 0x06, 0x00, 0x03, 0x00, 0x30, 0x00, 0x03, 0x18, 0x00, 0x00,
  0x00, 0x00, 0xc0, 0x00, 0x1f, 0xc0, 0x06, 0x00, 0x03, 0x00, 0x30, 0x00, 0x03, 0x18, 0x00, 0x00,
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  0x00, 0x00, 0xc0, 0x00, 0x18, 0x00, 0x06, 0x00, 0x03, 0x00, 0x30, 0x00, 0x07, 0xfc, 0x00, 0x00,
  0x00, 0x00, 0xc0, 0x00, 0x18, 0x00, 0x06, 0x00, 0x03, 0x00, 0x30, 0x00, 0x07, 0xfc, 0x00, 0x00,
  0x00, 0x00, 0xe0, 0x00, 0x18, 0x00, 0x06, 0x00, 0x03, 0x00, 0x38, 0x00, 0x06, 0x0c, 0x00, 0x00,
  0x00, 0x00, 0x60, 0x00, 0x18, 0x00, 0x06, 0x00, 0x03, 0x00, 0x18, 0x00, 0x0c, 0x0e, 0x00, 0x00,
  0x00, 0x00, 0x70, 0x00, 0x18, 0x00, 0x06, 0x00, 0x03, 0x00, 0x1c, 0x00, 0x0c, 0x06, 0x00, 0x00,
  0x00, 0x00, 0x38, 0xc0, 0x18, 0x00, 0x06, 0x00, 0x03, 0x00, 0x0e, 0x30, 0x0c, 0x06, 0x00, 0x00,
  0x00, 0x00, 0x3f, 0xc0, 0x1f, 0xe0, 0x07, 0xf8, 0x03, 0x00, 0x0f, 0xf0, 0x1c, 0x06, 0x00, 0x00,
  0x00, 0x00, 0x0f, 0x80, 0x1f, 0xe0, 0x07, 0xf8, 0x03, 0x00, 0x03, 0xe0, 0x1c, 0x07, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

const unsigned char silouhette[] PROGMEM = {
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7e, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x03, 0xf0, 0x0e, 0x70, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x41, 0xff, 0xf1, 0x82, 0x3e, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x0f, 0xff, 0xf1, 0xe1, 0x0f, 0xc0, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x3f, 0xff, 0xf1, 0xf8, 0x80, 0xf8, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0xff, 0xff, 0xf1, 0xfc, 0x60, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x7f, 0xff, 0xf1, 0xf0, 0x7c, 0x00, 0x40, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc6, 0x7f, 0xfc, 0x00, 0x00, 0xff, 0xff, 0xff, 0xf0, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xc0, 0x00, 0x00, 0x00, 0x03, 0xff, 0xff, 0xff, 0xf0, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0xe0, 0x80, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x1f, 0xf8, 0xff, 0xff, 0xff, 0xf9, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x0f, 0xff, 0xf9, 0xff, 0xff, 0xff, 0xf9, 0xff, 0xff, 0xff, 0xfe, 0x08, 0x00,
  0x00, 0x00, 0x01, 0xff, 0xff, 0xf9, 0xff, 0xff, 0xff, 0xf9, 0xff, 0xff, 0xff, 0xfe, 0x78, 0x00,
  0x00, 0x00, 0x3f, 0xff, 0xff, 0xf1, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xff, 0xff, 0xfe, 0x08, 0x00,
  0x00, 0x00, 0x1f, 0xfc, 0x3f, 0xf3, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xff, 0x87, 0xfe, 0x00, 0x00,
  0x00, 0x0f, 0x1f, 0xe0, 0x07, 0xf3, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xfc, 0x00, 0xff, 0xf8, 0x00,
  0x00, 0x00, 0x1f, 0x80, 0x01, 0xf3, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xf0, 0x00, 0x3f, 0xf8, 0x00,
  0x00, 0x20, 0x7f, 0x03, 0xc0, 0xf3, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xe0, 0x78, 0x1f, 0xf8, 0x00,
  0x00, 0x0f, 0xfe, 0x0f, 0xf0, 0x73, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xc1, 0xfe, 0x0f, 0xfe, 0x00,
  0x00, 0x0f, 0xfe, 0x1f, 0xf8, 0x71, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xc3, 0xff, 0x0f, 0xfe, 0x00,
  0x00, 0x4f, 0xfc, 0x3f, 0xfc, 0x31, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xc7, 0xff, 0x87, 0xfe, 0x00,
  0x00, 0x3f, 0xfc, 0x7f, 0xfe, 0x39, 0xff, 0xff, 0xff, 0xf8, 0xff, 0x8f, 0xff, 0xc7, 0xfe, 0x00,
  0x00, 0x3f, 0xfc, 0x7f, 0xfe, 0x19, 0xff, 0xff, 0xff, 0xf9, 0xff, 0x8f, 0xff, 0xc7, 0x80, 0x00
};

const unsigned char termometre[] PROGMEM = {
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x08, 0x00, 0x08, 0x00,
  0x0b, 0x80, 0x08, 0x00, 0x08, 0x00, 0x0b, 0x80, 0x08, 0x00, 0x08, 0x00, 0x0b, 0x80, 0x08, 0x00,
  0x08, 0x00, 0x0b, 0x80, 0x08, 0x00, 0x08, 0x00, 0x08, 0x00, 0x1c, 0x00, 0x3e, 0x00, 0x3e, 0x00,
  0x3e, 0x00, 0x1c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

const unsigned char guc[] PROGMEM = {
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x04, 0x00, 0x04, 0x00,
  0x0c, 0x00, 0x0c, 0x00, 0x1c, 0x00, 0x18, 0x00, 0x18, 0x00, 0x3c, 0x00, 0x3f, 0xc0, 0x7f, 0x80,
  0x7f, 0x80, 0x7f, 0x00, 0x7f, 0x00, 0x07, 0x00, 0x06, 0x00, 0x06, 0x00, 0x0c, 0x00, 0x0c, 0x00,
  0x0c, 0x00, 0x08, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

const unsigned char kabin[] PROGMEM = {
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x00, 0x38, 0x00, 0x3c, 0x00,
  0x36, 0x00, 0x93, 0x00, 0x81, 0x80, 0x99, 0x80, 0xb8, 0xc0, 0xe0, 0xc0, 0x60, 0x40, 0x3c, 0x40,
  0x3e, 0x40, 0x60, 0x40, 0xe0, 0xc0, 0xf0, 0xc0, 0x98, 0x80, 0x81, 0x80, 0x83, 0x00, 0x06, 0x00,
  0x1c, 0x00, 0x38, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

int currentMillis = 0;
int screenMillis = 0;
int previousMillis = 0;
int Tc;

void setup() {

  pinMode(ic, INPUT);
  pinMode(voltajV, INPUT);
  pinMode(anaButon, INPUT_PULLUP);
  pinMode(upButon, INPUT_PULLUP);
  pinMode(downButon, INPUT_PULLUP);

  Serial.begin(9600);
  display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS);
  display.setTextColor(WHITE, BLACK);
  display.setFont();
  display.setRotation(0);

  voltaj_olcum.begin(SMOOTHED_EXPONENTIAL, 2);
  ic_olcum.begin(SMOOTHED_EXPONENTIAL, 2);
  dis_olcum.begin(SMOOTHED_EXPONENTIAL, 2);
  sensors.begin();

  myRTC.setDS1302Time(0, dakika, saat, 0, 0, 0, 0);
  //delay(1000);
  //  lastPage = 2;
  display.clearDisplay();
  acilis();
}

void loop() {

  int ana = digitalRead(anaButon);
  int yukari = digitalRead(upButon);
  int asagi = digitalRead(downButon);

  executeCurrentFunction();
  /*
  screenMillis = millis();
  if (screenMillis - previousMillis >= 3000) {
    executeCurrentFunction();
    screenMillis = 0;
  }
*/
  if (ana == LOW) {
    currentPage = (currentPage + 1) % Page_Count;
    display.clearDisplay();
    //    executeCurrentFunction();
    delay(35);
  }

  if (yukari == LOW) {
    saat = saat + 1;
    if (saat > 23)
      saat = 0;
    Serial.print("yukarı");
    delay(35);
  }

  if (asagi == LOW) {
    dakika = dakika + 1;
    if (dakika > 59)
      dakika = 0;
    Serial.print("asagi");
    delay(35);
  }
  delay(50);
}

void executeCurrentFunction() {
  switch (currentPage) {
    case 0:
      zaman();
      break;
    case 1:
      zaman_temp();
      break;
    case 2:
      dis_sicaklik();
      break;
    case 3:
      ic_sicaklik();
      break;
    case 4:
      duble_temp();
      break;
    case 5:
      voltaj();
      break;
  }
}


void zaman() {
  RTCSaat();
  //display.drawBitmap(0, 0, saatimge, 11, 32, 1);
  display.setCursor(24, 8);
  display.setTextSize(3);
  if (myRTC.hours <= 9) {
    display.print("0");
    display.print(myRTC.hours);
  } else display.print(myRTC.hours);
  display.print(":");
  if (myRTC.minutes <= 9) {
    display.print("0");
    display.print(myRTC.minutes);
  } else
    display.print(myRTC.minutes);
  display.display();
  lastPage = 0;
  delay(50);
}

void ic_sicaklik() {

  temp_ic();
  display.clearDisplay();
  display.drawBitmap(0, 2, kabin, 11, 32, 1);
  display.setCursor(28, 8);
  display.setTextSize(3);
  display.print(I1, 1);
  display.print(" C");
  display.display();
  //Serial.print(Tc);
  Serial.println(I1);
  lastPage = 3;
  //delay(50);
}

double temp_ic() {

  int ic_sic = analogRead(ic);
  R2 = R1 * (1023.0 / (float)ic_sic - 1.0);
  logR2 = log(R2);
  int T = (1.0 / (c1 + c2 * logR2 + c3 * logR2 * logR2 * logR2));
  Tc = T - 273.15;

  ic_olcum.add(Tc);
  I1 = ic_olcum.get();
}

void dis_sicaklik() {

  //temp_dis();
  display.drawBitmap(0, 2, termometre, 11, 32, 1);
  display.setTextSize(3);
  display.setCursor(28, 8);
  display.setTextSize(3);
  display.print(D1, 1);
  display.print(" C");
  display.display();
  lastPage = 2;
  //delay(50);
}

void temp_dis() {

  sensors.requestTemperatures();
  dis_sic = sensors.getTempCByIndex(0);
  dis_olcum.add(dis_sic);
  D1 = dis_olcum.get();
}

void voltaj() {

  float voltaj_giris = analogRead(voltajV);
  float Vcalc = (5.0 / 1024) * voltaj_giris;
  Vcalc = Vcalc * 2.995;

  voltaj_olcum.add(Vcalc);
  float V1 = voltaj_olcum.get();

  display.drawBitmap(0, 2, guc, 11, 32, 1);
  display.setTextSize(3);
  display.setCursor(24, 8);
  display.print(V1, 1);
  display.setCursor(90, 8);
  display.print(" V");
  display.display();
  lastPage = 5;
  //delay(50);
}

void zaman_temp() {

  temp_dis();
  RTCSaat();
  // display.drawBitmap(0, 0, saatimge, 11, 32, 1);
  //display.drawBitmap(64, 0, termometre, 11, 32, 1 / 2);
  display.setTextSize(2);
  display.setCursor(0, 10);
  if (myRTC.hours < 10) { display.print("0"); }
  display.print(myRTC.hours);
  display.print(":");
  if (myRTC.minutes < 10) { display.print("0"); }
  display.print(myRTC.minutes);

  display.setCursor(70, 10);
  display.print(dis_sic);
  display.setTextSize(1);
  display.print("C");
  display.display();
  lastPage = 1;
}

void duble_temp() {

  temp_ic();
  temp_dis();
  display.drawBitmap(0, 2, kabin, 11, 32, 1);
  display.drawBitmap(64, 2, termometre, 11, 32, 1);
  display.setTextSize(2);
  display.setCursor(16, 10);
  display.print(I1, 0);
  //display.print("C");
  display.setCursor(80, 10);
  display.print(D1, 0);
  //display.print("C");
  display.display();
  lastPage = 4;
}

void RTCSaat() {
  myRTC.updateTime();
  currentMillis = millis();

  if (currentMillis - previousMillis >= 2000) {
    currentMillis = 0;
    myRTC.updateTime();
  }
}

void acilis() {

  for (int xLoc = 128; xLoc >= 0; (xLoc = xLoc - 32)) {
    display.drawBitmap(xLoc, 0, silouhette, 128, 32, 1);
    display.display();
    delay(35);
    display.clearDisplay();
    // display.fillScreen(BLACK);
    delay(5);
  }
  delay(750);
  display.drawBitmap(0, 0, celica, 128, 32, 1);
  display.display();
  delay(750);
  display.clearDisplay();
  currentPage = lastPage;
  executeCurrentFunction();
}

BobaMosfet · Sep 10, 2024

You need to flow-chart your code, and then test all possibilities in the flow-chart. Guaranteed to find any and every flaw.

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Mini Info Screen for a car

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Mini Info Screen for a car

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