// Stefius Klimakiste
// Version 1.0 09.12.22

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

// AHT10/20
#include <Adafruit_AHTX0.h>
Adafruit_AHTX0 aht;
#define SCREEN_WIDTH 128     // OLED display width, in pixels
#define SCREEN_HEIGHT 32     // OLED display height, in pixels
#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);

// Trendvariablen
int trent_x = 0;
int trent_n = 30;
float temp_trent;
float hydr_trent;
float temp_t;
float hydr_t;
float temp_t2;
float hydr_t2;
char temp_txt[8];
char hydr_txt[8];
int balken = 0;
// INput
int Taster = 2;
int Taster_status = 0;

void setup() {
  Wire.begin();        // i2c bus
  Serial.begin(9600);  // serial

  if (!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;)
      ;
  }
  display.display();
  // Lösche Anzeige
  display.clearDisplay();

  if (!aht.begin()) {
    Serial.println("Kein Geber AHT? Check");
    delay(10);
  }
  Serial.println("AHT10 oder AHT20 nicht da");
  // Interupt aufrufen
  attachInterrupt(digitalPinToInterrupt(Taster), tasters, RISING);
}

void tasters() {
  Taster_status = 1;
}

void loop() {
  // Sensor AHT 10/20
  sensors_event_t humidity, temp;
  aht.getEvent(&humidity, &temp);

  temp_trent = temp_trent + temp.temperature;
  hydr_trent = hydr_trent + humidity.relative_humidity;
  trent_x++;

  if (trent_x == trent_n) {
    // Durchschnitt
    temp_t2 = round(temp_trent / trent_n);
    hydr_t2 = round(hydr_trent / trent_n);

    strcpy(temp_txt, "=");
    strcpy(hydr_txt, "=");

    if (temp_t > temp_t2) {
      strcpy(temp_txt, "\x1F");
    }
    if (temp_t < temp_t2) {
      strcpy(temp_txt, "\x1E");
    }

    if (hydr_t > hydr_t2) {
      strcpy(hydr_txt, "\x1F");
    }
    if (hydr_t < hydr_t2) {
      strcpy(hydr_txt, "\x1E");
    }

    trent_x = 0;
    temp_trent = temp_t = temp_t2;
    hydr_trent = hydr_t = hydr_t2;
    display.cp437(true);
    display.fillRect(0, 22, 128, 17, BLACK);
    display.setTextSize(2);
    display.setTextColor(SSD1306_WHITE);
    display.setCursor(0, 22);
    display.print(String(temp_txt));
    display.setCursor(116, 22);
    display.print(String(hydr_txt));
    display.setCursor(30, 22);
    display.setTextSize(1);
    display.print("Trent");
    display.display();
  }

  balken = round(128 / trent_n * trent_x);
  display.fillRect(0, 17, 128, 2, BLACK);
  display.fillRect(0, 17, balken, 2, WHITE);
  display.display();

  if (trent_x % 2 == 0) {
    display.fillRect(30, 22, 85, 10, BLACK);
    display.setCursor(30, 24);
    display.setTextSize(1);
    display.print("Trent");
  } else {
    display.fillRect(30, 22, 85, 10, BLACK);
    display.setCursor(30, 24);
    display.setTextSize(1);
    display.print("Klimakiste");
  }


  if (Taster_status == 1) {
    display.cp437(true);
    display.fillRect(0, 0, 128, 32, BLACK);
    display.setTextSize(3);
    display.setTextColor(SSD1306_WHITE);
    display.setCursor(0, 0);
    display.print(" " + String(temp.temperature, 1) + "\xF8" + "C ");
    display.display();
    delay(800);
    display.fillRect(0, 0, 128, 32, BLACK);
    display.setTextSize(3);
    display.setTextColor(SSD1306_WHITE);
    display.setCursor(0, 0);
    display.print(" " + String(humidity.relative_humidity, 1) + "%");
    display.display();
    delay(1200);
    display.fillRect(0, 0, 128, 32, BLACK);
    display.display();
    Taster_status = 0;
  } else {
    display.cp437(true);
    display.fillRect(0, 0, 128, 17, BLACK);
    display.setTextSize(2);
    display.setTextColor(SSD1306_WHITE);
    display.setCursor(0, 0);
    display.print(String(temp.temperature, 1) + "\xF8" + "C ");
    display.setCursor(90, 0);
    display.print(String(humidity.relative_humidity, 0) + "% ");
    display.display();

    delay(2000);
  }
}