// Custom Libraries from:         https://wokwi.com/projects/371042933135787009

// For Programming the Attiny85:  https://www.instructables.com/How-to-Program-an-Attiny85-From-an-Arduino-Uno/
//                                https://homemadehardware.com/guides/programming-an-attiny85/


#include <TinyWireM.h>
#include "LiquidCrystal_I2C.h"

#define GPIO_ADDR     0x27                  // (PCA8574A A0-A2 @5V) typ. A0-A3 Gnd 0x20 / 0x38 for A
LiquidCrystal_I2C lcd(GPIO_ADDR, 16, 2);    // set address & 16 chars / 2 lines

const byte sensorPin = A3;                  // Set Analog Input Pin For Temperature Sensor
const byte sPin0 = PB1;
const byte sPin1 = PB4;
const byte sPin2 = PB5;


// Create Global Variables:
float temperature = 0;                      // Create Variable To Store Temperature
float tempSum = 0;
int measurementCounter = 0;


// Create Global Constants:
const long delTime_Main = 500;              // Set Main Loop Delay
const bool sArray0[] = {0, 1, 0, 1, 0, 1, 0, 1};
const bool sArray1[] = {0, 0, 1, 1, 0, 0, 1, 1};
const bool sArray2[] = {0, 0, 0, 0, 1, 1, 1, 1};
const int measureTime = 20;
const int numMeasures = 10;



void setup() {
  TinyWireM.begin();
  lcd.init();
  lcd.backlight();
  lcd.clear();
  pinMode(sPin0,OUTPUT);
  pinMode(sPin1,OUTPUT);
  pinMode(sPin2,OUTPUT);
}

void loop() {
  // Read Temperature:
  // temperature = analogRead(sensorPin);      // Insert math here to convert input value to temperature
  readSensors();
  // Clear Previous Temperature From Display:
  lcd.setCursor(0, 1);
  lcd.print("                ");
  // Display Temperature:
  lcd.setCursor(0, 0);
  lcd.print("Temperature:");
  lcd.setCursor(0, 1);
  lcd.print(temperature);
  lcd.print((char)223);
  lcd.print("F");
  // Wait:
  // delay(delTime_Main);
}

void readSensors() {                        // Cycle through the mux and read the sensors
  tempSum = 0;
  measurementCounter = 0;
  for (int i=0; i<8; i++) {
    digitalWrite(sPin0, sArray0[i]);
    digitalWrite(sPin1, sArray1[i]);
    digitalWrite(sPin2, sArray2[i]);
    for (int j=0; j<numMeasures; j++) {
      delay(measureTime);
      tempSum = tempSum + analogRead(sensorPin);
      measurementCounter = measurementCounter + 1;
    }
  }
  temperature = tempSum/measurementCounter;
}