#include <Arduino.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#include "dht.h"
#include "customChars.h"

#define SOIL_PIN A0
#define RELAY_PIN 8


LiquidCrystal_I2C lcd(0x27,16,2);

void customChars(){
    lcd.createChar(0, waterDropEmpt);
    lcd.createChar(1, waterDropHalf);
    lcd.createChar(2, waterDropFull);
    lcd.createChar(3, thermometer);
}

void setup() {
    Serial.begin(9600);
    Wire.begin();
    dht.begin();
    
    lcd.init();
    lcd.backlight();

    customChars();
}

void loop() {
    int16_t soilMoisture = analogRead(SOIL_PIN);

    int8_t moisturePercentage = map(soilMoisture, 905, 420, 0, 100);
    String msg = moisturePercentage < 20 ? "WET" : moisturePercentage > 75 ? "DRY" : "OK";

    int8_t temperature = dht.readTemperature();
    
  	// debug
  	Serial.print("Sensor Value = ");
    Serial.print(soilMoisture);
  	Serial.print("; Percentage = ");
    Serial.println(moisturePercentage);
  
    lcd.clear();

    lcd.setCursor(0,0);

    moisturePercentage < 20 ? lcd.write(byte(2)) : moisturePercentage > 75 ? lcd.write(byte(0)) : lcd.write(byte(1));

    lcd.setCursor(2,0);
    lcd.print("Soil: ");
    lcd.print(msg);

    lcd.setCursor(0,1);
    lcd.write(byte(3));
    lcd.print(" ");
    lcd.print(temperature);
    lcd.write(byte(223));
    lcd.print("C");

    delay(500); 
}