// ----- TeZ ---- DHT Display on OLED screen -----
//* OLED DISPLAY 3.3V(VCC), GND, SCL (21), SDA (22) [ESP32]
//* model: SSD1306  Resolution: 128 x 64  (small = 128 x 32)
// FONTS >> in file OLEDdisplayFonts.h
// ArialMT_Plain_10, ArialMT_Plain_16, ArialMT_Plain_24
// SansSerif_plain_10, SansSerif_plain_12
// Dingbats__12 
// Monospaced_plain_8, Monospaced_plain_10, Monospaced_plain_12, Monospaced_bold_10, Monospaced_bold_16, Monospaced_bold_24  // 
// ceated with http://oleddisplay.squix.ch/
// - DHT Sensor Library: https://github.com/adafruit/DHT-sensor-library
// - Adafruit Unified Sensor Lib: https://github.com/adafruit/Adafruit_Sensor
//   https://learn.adafruit.com/dht/overview

#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <DHT_U.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include "fontdef.h"
//#include "SSD1306.h" // alias for `#include "SSD1306Wire.h"`
#include "SSD1306Wire.h"
#include "OLEDDisplayUi.h"
#include <driver/adc.h>

// Initialize the OLED display using Wire library
SSD1306Wire  display(0x3c, 21, 22);

// SSD1306 pinout for ESP32
// SDA >> 21 
// SCL >> 22
// VCC >> Vin 5V
// GND >> GND
 

#define DHTPIN 25     // Digital pin connected to the DHT sensor 

// Uncomment the type of sensor in use:
#define DHTTYPE    DHT11     // DHT 11
//#define DHTTYPE    DHT22     // DHT 22 (AM2302)
//#define DHTTYPE    DHT21     // DHT 21 (AM2301)
DHT_Unified dht(DHTPIN, DHTTYPE);

uint32_t delayMS;

int wemosLEDpin = 02;
int SMOKETIME = 5000;
bool SMOKEFLAG = true;

///////////////////////////////////////////////////////
void setup() {
  Serial.begin(115200);

  pinMode(wemosLEDpin, OUTPUT);
  pinMode(4, OUTPUT);

  digitalWrite(4, true);
  digitalWrite(wemosLEDpin, true);
      

  // Initialising the OLED display
  display.init();
  display.flipScreenVertically();
  display.setTextAlignment(TEXT_ALIGN_LEFT);
  display.clear();    
    
  display.setFont(Monospaced_bold_16);
  display.drawString(0, 0, "Hello Human!");
  display.setFont(Monospaced_plain_12);
  display.drawString(20, 30, "How are you");
  display.drawString(40, 50, "today?");
    
  display.display();

  delay(3000);

 
  
  
  // Initialize DHT device.
  dht.begin();
  Serial.println(F("DHTxx Unified Sensor Example"));
  // Print temperature sensor details.
  sensor_t sensor;
  dht.temperature().getSensor(&sensor);
  Serial.println(F("------------------------------------"));
  Serial.println(F("Temperature Sensor"));
  Serial.print  (F("Sensor Type: ")); Serial.println(sensor.name);
  Serial.print  (F("Driver Ver:  ")); Serial.println(sensor.version);
  Serial.print  (F("Unique ID:   ")); Serial.println(sensor.sensor_id);
  Serial.print  (F("Max Value:   ")); Serial.print(sensor.max_value); Serial.println(F("°C"));
  Serial.print  (F("Min Value:   ")); Serial.print(sensor.min_value); Serial.println(F("°C"));
  Serial.print  (F("Resolution:  ")); Serial.print(sensor.resolution); Serial.println(F("°C"));
  Serial.println(F("------------------------------------"));
  // Print humidity sensor details.
  dht.humidity().getSensor(&sensor);
  Serial.println(F("Humidity Sensor"));
  Serial.print  (F("Sensor Type: ")); Serial.println(sensor.name);
  Serial.print  (F("Driver Ver:  ")); Serial.println(sensor.version);
  Serial.print  (F("Unique ID:   ")); Serial.println(sensor.sensor_id);
  Serial.print  (F("Max Value:   ")); Serial.print(sensor.max_value); Serial.println(F("%"));
  Serial.print  (F("Min Value:   ")); Serial.print(sensor.min_value); Serial.println(F("%"));
  Serial.print  (F("Resolution:  ")); Serial.print(sensor.resolution); Serial.println(F("%"));
  Serial.println(F("------------------------------------"));
  // Set delay between sensor readings based on sensor details.
  delayMS = sensor.min_delay / 1000;
}


///////////////////////////////////////////////////////
void loop() {

  // FOG SWITCH
  delay(SMOKETIME);
  SMOKEFLAG = !(SMOKEFLAG);
  digitalWrite(4, SMOKEFLAG);
  digitalWrite(wemosLEDpin, SMOKEFLAG);

  // SENSOR AND DISPLAY
  display.clear();
  
  // Delay between measurements.
  delay(delayMS);
  // Get temperature event and print its value.
  sensors_event_t event;
  dht.temperature().getEvent(&event);
  if (isnan(event.temperature)) {
    Serial.println(F("Error reading temperature!"));
  }
  else {
    display.setFont(Monospaced_bold_16);
    display.drawString(0, 10, "Temp:");
    display.drawString(50, 10, String(int(event.temperature)) + " c" );

    Serial.print(F("Temperature: "));
    Serial.print(event.temperature);
    Serial.println(F("°C"));
  }
  // Get humidity event and print its value.
  dht.humidity().getEvent(&event);
  if (isnan(event.relative_humidity)) {
    Serial.println(F("Error reading humidity!"));
  }
  else {
    display.setFont(Monospaced_bold_16);
    display.drawString(0, 50, "Hum:");
    display.drawString(50, 50, String(int(event.relative_humidity)) + " %");
 
    Serial.print(F("Humidity: "));
    Serial.print(event.relative_humidity);
    Serial.println(F("%"));
  }

  display.display();

//  printBuffer();


  
}

////////////////////////////////////////////
void printBuffer(void) {
  // Initialize the log buffer
  // allocate memory to store 8 lines of text and 30 chars per line.
  display.setLogBuffer(5, 30);

  // Some test data
  const char* test[] = {
      "Hello",
      "World" ,
      "----",
      "Show off",
      "how",
      "the log buffer",
      "is",
      "working.",
      "Even",
      "scrolling is",
      "working"
  };

  for (uint8_t i = 0; i < 11; i++) {
    display.clear();
    // Print to the screen
    display.println(test[i]);
    // Draw it to the internal screen buffer
    display.drawLogBuffer(0, 0);
    // Display it on the screen
    display.display();
    delay(500);
  }
}