#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <CD74HC4067.h>
#include <Servo.h>

CD74HC4067 my_mux(5, 4, 3, 2);  // (S0, S1, S2, S3)
LiquidCrystal_I2C lcd(0x27, 16, 2);
Servo waterPump;
int relay = 8; // Define the pin number for the relay


void setup() {
  Serial.begin(115200);
  lcd.begin(16, 2);
  lcd.init();
  lcd.backlight();
  waterPump.attach(9); // Attach servo to pin 9
  pinMode(8, INPUT); // Mengatur pin 8 sebagai output untuk relay

}

void loop() {
  lcd.clear();

  for (int i = 0; i < 8; i++) { // Loop through each sensor
    my_mux.channel(i); // Select the sensor channel

    int sensorNumber = i + 1; // Change sensor number to start from 1
    int soilMoistureValue = analogRead(A0 + i); // Read soil moisture level from the selected sensor
    double y = map(soilMoistureValue, 0, 1023, 0, 100); // Map the soil moisture value to a range of 0 to 100

    // Display the result on LCD with sensor number starting from 1
    lcd.setCursor(0, 0);
    lcd.print("Sensor " + String(sensorNumber) + ":");
    lcd.setCursor(0, 1);
    lcd.print("Moisture: " + String(y, 0) + "%");

    // Control the water pump (servo) based on soil moisture value using relay
    if (y < 50) {
      digitalWrite(8, HIGH); // Turn on the relay to activate the servo if moisture is below 50%
    } else {
      digitalWrite(8, LOW); // Turn off the relay to deactivate the servo if moisture is above 50%
    }

    delay(2000); // Delay for display stability
  }
}