// Channel id 2466654
// Channel ip key 7VQ2OFGNKIDVVL2B

#define MAX_DISTANCE 100  // Define the maximum sensor range in cm
#define FULL_DISTANCE 0 
#define Buzzer 25
#define LED_LOW 13
#define LED_AVE 14
#define LED_HIGH 5
#define LED_FULL 4
#define LED_EMPTY 12


long duration;
float distance;
float distanceInch;

//menghubungkan ke wifi
#include <WiFi.h>
#include <WiFiClient.h>

const char* WIFI_NAME = "Wokwi-GUEST";
const char* WIFI_PASSWORD = "";
const char* ssid = "Wokwi-GUEST";
const char* pass = "";

WiFiClient alfa;

unsigned long ChannelID = 2508390;
const char * WriteAPI = "AO270OTOOI4K9B9H";
const char* server = "api.thingspeak.com";

#include <Ultrasonic.h>
#include <LiquidCrystal_I2C.h>

//library thingspeak
#include <ThingSpeak.h>

int lcdColumns = 16;
int lcdRows = 2;
LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRows); 


Ultrasonic ultrasonic(18, 19);  //Trig 12 Echo 14

int RELAY_PIN = 32;

void setup() {
  // Debug console
  Serial.begin(115200);
  pinMode(Buzzer, OUTPUT);
  pinMode(LED_EMPTY, OUTPUT);
  pinMode(LED_LOW, OUTPUT);
  pinMode(LED_AVE, OUTPUT);
  pinMode(LED_HIGH, OUTPUT);
  pinMode(LED_FULL, OUTPUT);
  pinMode(RELAY_PIN, OUTPUT);
  lcd.init();
  lcd.backlight();

Serial.println("Scan WiFi...");
  int networks = WiFi.scanNetworks();
  if(networks == 0){
    Serial.println("No WiFi Networks!");
  }
  else{
    Serial.print(networks);
    Serial.println("Networks Found!");
    for(int i = 0; i < networks; i++)
      Serial.println(WiFi.SSID());
      delay(10);
  }

  //menyambungkan ke wifi
  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED){
    delay(100);
    Serial.println(".");
  }
  Serial.println("WiFi Connected!");
  Serial.println(WiFi.localIP());

  //memulai program thingspeak
  ThingSpeak.begin(alfa);

}

void loop() {
   distance = ultrasonic.read();
  // Calculate the slurry level percentage
  int slurryLevelPercentage = map(distance, FULL_DISTANCE, MAX_DISTANCE, 100, 0);
  slurryLevelPercentage = constrain(slurryLevelPercentage, 0, 100);  // Ensure it stays within 0-100%
  Serial.print("Distance in CM: ");
  Serial.println(distance);
  Serial.print(slurryLevelPercentage);
  Serial.println("%");
   lcd.setCursor(0, 0);
  lcd.print("Slurry Lvl: ");
lcd.print(slurryLevelPercentage);
lcd.print(" %");

  if (slurryLevelPercentage <= 54 && slurryLevelPercentage >= 56){
    digitalWrite(Buzzer, HIGH);
    Serial.println("Buzzer ON!");
  }else {
    digitalWrite(Buzzer, LOW);
  }

  if (slurryLevelPercentage <= 54){
    digitalWrite(RELAY_PIN, HIGH);
    Serial.println("Water Pump ON!");
  }else {
    digitalWrite(RELAY_PIN, LOW);
  }

  if (slurryLevelPercentage < 9){
    Serial.println("Slurry is EMPTY");
    digitalWrite(LED_EMPTY, LOW);
     digitalWrite(LED_LOW, HIGH);
      digitalWrite(LED_AVE, LOW);
       digitalWrite(LED_HIGH, LOW);
        digitalWrite(LED_FULL, LOW);
        lcd.setCursor(0, 1);
lcd.print("EMPTY");

  }else if (slurryLevelPercentage >= 10 && slurryLevelPercentage <= 53){
    
    Serial.println("Slurry is LOW");
      digitalWrite(LED_EMPTY, HIGH);
     digitalWrite(LED_LOW, LOW);
      digitalWrite(LED_AVE, LOW);
       digitalWrite(LED_HIGH, LOW);
        digitalWrite(LED_FULL, LOW);
        lcd.setCursor(0, 1);
lcd.print("Under Set Point");

  }else if (slurryLevelPercentage >= 54 && slurryLevelPercentage <= 56 ){
    
    Serial.println("Slurry is On Set Point");
    digitalWrite(LED_EMPTY, LOW);
      digitalWrite(LED_LOW, LOW);
        digitalWrite(LED_AVE, LOW);
          digitalWrite(LED_HIGH, HIGH);
            digitalWrite(LED_FULL, HIGH);
            lcd.setCursor(0, 1);
lcd.print("On Set Point");  

    }else if (slurryLevelPercentage >= 57 && slurryLevelPercentage <= 90 ){
      
    Serial.println("Slurry is High");
    digitalWrite(LED_EMPTY, LOW);
      digitalWrite(LED_LOW, HIGH);
        digitalWrite(LED_AVE, LOW);
          digitalWrite(LED_HIGH, LOW);
            digitalWrite(LED_FULL, LOW);
            lcd.setCursor(0, 1);
lcd.print("Over Set Point");  
    }
    else {
     Serial.println("Slurry is FULL");
     digitalWrite(LED_EMPTY, HIGH);
      digitalWrite(LED_LOW, HIGH);
        digitalWrite(LED_AVE, LOW);
         digitalWrite(LED_HIGH, LOW);
          digitalWrite(LED_FULL, LOW);
          lcd.setCursor(0, 1);
lcd.print("FULL");
  }

  delay(2000);
  lcd.clear();
 
int x = ThingSpeak.writeField (ChannelID, 1, slurryLevelPercentage, WriteAPI);
delay(1500);

 }