Help adding an OLED start screen/pausing code?

mmimadi · March 28, 2020, 8:27pm

Hi! I made a thermostat with an oled display and I would like to have a start screen where you need to press a button for it to move onto the main loop and start heating up. I am confused how to do this, I tried using a while loop as well as a void but have not been sucessful. If anyone could help that would be appreciated. Ive attached the code im working on

#include<Wire.h> //I2C com for base and OLED
#include <EEPROM.h>
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);
#define LOGO16_GLCD_HEIGHT 32 //oled height
#define LOGO16_GLCD_WIDTH  128 //oled width
static const unsigned char PROGMEM boot[] = { 
0x00, 0x00, 0x00, 0xF8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x1E, 0x08,
0x00, 0x00, 0x07, 0xFC, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x1E, 0x08,
0x00, 0x00, 0xFF, 0xFE, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x1E, 0x08,
0x00, 0x03, 0xFF, 0xFE, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0xBE, 0x3E,
0x00, 0x07, 0xFF, 0xFE, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0xFE, 0x36,
0x00, 0x07, 0xFF, 0xFE, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0xE2, 0xFF,
0x00, 0x07, 0xFF, 0xFC, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x42, 0xC1,
0x00, 0x07, 0xFF, 0xF8, 0x78, 0x01, 0xF0, 0x3C, 0x39, 0xFF, 0x9C, 0x1C, 0x00, 0x08, 0x02, 0xC1,
0x00, 0x07, 0xFF, 0xF0, 0x78, 0x01, 0xF0, 0x3C, 0x79, 0xFF, 0x9C, 0x1C, 0x00, 0x00, 0x00, 0x00,
0x00, 0x03, 0xF8, 0x00, 0x78, 0x01, 0xF8, 0x3C, 0x79, 0xFF, 0x9C, 0x1C, 0x00, 0x00, 0x00, 0x00,
0x00, 0x03, 0xF8, 0x00, 0x78, 0x03, 0xF8, 0x3C, 0x71, 0xF0, 0x1E, 0x3C, 0x00, 0x00, 0x00, 0x00,
0x00, 0x03, 0xF8, 0x00, 0x78, 0x03, 0xF8, 0x3C, 0xF1, 0xF0, 0x1E, 0x7C, 0x00, 0x07, 0xE0, 0x00,
0x00, 0x03, 0xF8, 0x00, 0x78, 0x03, 0xFC, 0x3F, 0xE1, 0xFF, 0x8F, 0xF8, 0x00, 0x07, 0xF8, 0x18,
0x00, 0x01, 0xF8, 0x00, 0x78, 0x07, 0xBC, 0x3F, 0xE1, 0xFF, 0x8F, 0xF8, 0x00, 0x04, 0x1C, 0x18,
0x07, 0x81, 0xF8, 0x00, 0x78, 0x07, 0x1E, 0x3F, 0xE1, 0xFF, 0x87, 0xF0, 0x00, 0x04, 0x1C, 0x18,
0x07, 0x81, 0xFF, 0xFC, 0x78, 0x0F, 0xFE, 0x3D, 0xF1, 0xF0, 0x03, 0xE0, 0x00, 0x04, 0x1C, 0x18,
0x07, 0x81, 0xFF, 0xFC, 0x78, 0x0F, 0xFE, 0x3D, 0xF1, 0xF0, 0x03, 0xE0, 0x00, 0x04, 0x1C, 0x18,
0x0F, 0x81, 0xFF, 0xFC, 0x78, 0x0F, 0xFE, 0x3C, 0xF1, 0xF0, 0x03, 0xE0, 0x00, 0x04, 0x1C, 0x18,
0x0F, 0x81, 0xFF, 0xFC, 0x7F, 0x9F, 0xFF, 0x3C, 0xF9, 0xFF, 0x83, 0xE0, 0x00, 0x04, 0x1C, 0x18,
0x0F, 0x81, 0xFF, 0xFC, 0x7F, 0x9E, 0x0F, 0x3C, 0x79, 0xFF, 0x83, 0xE0, 0x00, 0x07, 0xF8, 0x18,
0x0F, 0x81, 0xFF, 0xFC, 0x7F, 0x9E, 0x0F, 0x3C, 0x79, 0xFF, 0x83, 0xE6, 0x00, 0x07, 0xE0, 0x18,
0x0F, 0x81, 0xFC, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xCE, 0x00, 0x00, 0x00, 0x00,
0x0F, 0xC3, 0xFC, 0x00, 0x00, 0x07, 0xFF, 0xFC, 0x00, 0x00, 0x07, 0xCE, 0x00, 0x00, 0x00, 0x00,
0x0F, 0xEF, 0xF8, 0x00, 0x00, 0x7F, 0xFF, 0xFF, 0xFE, 0x00, 0x0F, 0x86, 0x00, 0x00, 0x00, 0x00,
0x0F, 0xFF, 0xF8, 0x00, 0x03, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x06, 0x00, 0x00, 0x00, 0x00,
0x0F, 0xFF, 0xF0, 0x00, 0x07, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0x06, 0x00, 0x00, 0x00, 0x00,
0x07, 0xFF, 0xF0, 0x00, 0x0F, 0xFF, 0xC1, 0xFF, 0xFF, 0xFF, 0xFC, 0x06, 0x00, 0x00, 0x00, 0x00,
0x07, 0xFF, 0xF0, 0x00, 0x0F, 0xFF, 0xC1, 0xFF, 0xFF, 0xFF, 0xFC, 0x06, 0x00, 0x00, 0x00, 0x00,
0x03, 0xFF, 0xE0, 0x00, 0x0F, 0xF0, 0x00, 0x00, 0x3F, 0xFF, 0xF0, 0x0F, 0x00, 0x00, 0x00, 0x00,
0x01, 0xFF, 0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x00, 0x00, 0x00, 0x00,
0x00, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

#if (SSD1306_LCDHEIGHT != 32)
#error("Display Error.");
#endif

int temperatureWrite; //Global Temperature Setting
byte tempSave; //written to eeprom
int thermister = 0;
const int pwm = 5;
const int buttonPin = 6;//button!!!!!!!!!!!!
int buttonState = 0;
 
//Voltage divider
int raw = 0;
int Vin = 4;
float Vout = 0;
float R1 = 100;
float R2 = 0; //calculate this 
int temperatureRead; //then solve for this (y=mx+b)
float buffer = 0;

//PID controller
float PID_error;
float previous_error;
float Totaltime, Time, Previoustime;
int PID_value = 0;
int temperatureBuffer;

int P = 20.0; int PID_P = 0;
int I = 0.3; int PID_I = 0;
int D = 2.0; int PID_D = 0;


void setup()
{
  //Display & UI Boot Up
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C); //OLED I2C address is 0x32
  display.clearDisplay();
  display.drawBitmap(0, 0,  boot, 128, 32, 1);
  display.display();
  Serial.begin(9600);
  pinMode(pwm, OUTPUT);
  pinMode(buttonPin, INPUT);
 tempSave = EEPROM.read(0); //read eeprom and assign to variable
 delay(6000); //Logo Delay
  display.clearDisplay();
}


void loop()

{
   
   int val = analogRead(0);
 
 temperatureWrite = tempSave*25;
 
//temperature graph calculation
  raw = analogRead(thermister);
  buffer = raw * Vin;
  Vout = (buffer) / 1024.0;
  buffer = (Vin / Vout) - 1;
  R2 = R1 * buffer;

  //y=5(x)-220 math sucks
  temperatureRead = (5 * R2) - 220;
  //Calc P & I
  PID_error = temperatureRead - temperatureWrite + 10;
  PID_P = P * PID_error;
  if (-1 < PID_error < 1)
  {
    PID_I = PID_I + (I * PID_error);
  }
  //Calculate D
  Previoustime = Time;
  Time = millis();
  Totaltime = (Time - Previoustime) / 1000;
  PID_D = D * ((PID_error - previous_error) / Totaltime);
  PID_value = PID_P + PID_I + PID_D;

  //auto adjust
  if (PID_value < 0) {
    PID_value = 0;
  }
  if (PID_value > 255) {
    PID_value = 255;
  }
  
  buttonState = digitalRead(buttonPin);


  if (buttonState == LOW) {
    display.clearDisplay();
    display.setCursor(20, 10);
    display.setTextSize(2);
    
    //display.drawBitmap(0, 0,  boot, 128, 32, 1);
  display.display();
    display.display();
    delay(0);
    temperatureWrite = temperatureWrite + 25;
    display.clearDisplay();
    display.println(temperatureWrite);
    tempSave = temperatureWrite/25;
     EEPROM.update(0, tempSave); 
     
  }
  
 if (tempSave > 20 && temperatureWrite > 500) { //set max temp
   display.clearDisplay();
   temperatureWrite = 0;
   tempSave = 0;
   display.setCursor(20, 10);
   display.setTextSize(2);
   display.println("OFF X.X");

    display.display();
   delay(1770);
   display.clearDisplay();
   
  }

  if (temperatureWrite > 1 && temperatureWrite < 26) {
    temperatureWrite = 100;//set min temp
    tempSave = 4;
  
}

//normal display data
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(0, 12);
  display.println(temperatureRead);
  display.setCursor(40, 12);
  display.setTextSize(2);
  display.println("C");
  display.setCursor(65, 12);
  display.println(temperatureWrite);
  display.setCursor(68, 3);
  display.setTextSize(1);
  display.println("TARGET");
  display.display();
  delay(0);
  display.clearDisplay();

  analogWrite(pwm, 255 - PID_value);
  previous_error = PID_error;



 delay(0);

}

PickyBiker · March 29, 2020, 2:18am

One way to do what you ask is to wire a switch between an Arduino pin and ground. Configure the pin as INPUT_PULLUP. Then:

At the end of your setup code place the following statement.
while (digitalRead(PIN) == HIGH); // The sketch will wait here until the switch is pressed to bring the pin LOW.

You can also display anything you want on the screen BEFORE that while line. For Example: "Push the button to start".

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Help adding an OLED start screen/pausing code?

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