#include <WiFi.h>
#include "ThingSpeak.h"

const int SOIL_MOISTURE_PIN = 34;
const int SPRINKLER_CONTROL_PIN = 19;

int MOISTURE_THRESHOLD_LOW = 15;            
int MOISTURE_THRESHOLD_HIGH = 85;           
bool SPRINKLER_ACTIVATION_STATUS = false;

char* WIFI_NAME = "Wokwi-GUEST";
char* WIFI_PASSWORD = "";
int myChannelNumber = 2833645;              
char* myApiKey = "EJKBWBE6KY88FUWB";        
WiFiClient client;

void setup() 
{
  Serial.begin(115200);
  WiFi.begin(WIFI_NAME, WIFI_PASSWORD);
  Serial.println("Connecting...");
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("\nWi-Fi connected");
  Serial.println("Local IP: " + String(WiFi.localIP()));
  Serial.println("-------------");
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);

  pinMode(SPRINKLER_CONTROL_PIN, OUTPUT);
  digitalWrite(SPRINKLER_CONTROL_PIN, LOW); // Ensure relay is off initially
}

void loop()
{
  int soilMoisturePercentage = map(analogRead(SOIL_MOISTURE_PIN), 0, 4095, 0, 100);

  // Sprinkler activation threshold check
  if (soilMoisturePercentage < MOISTURE_THRESHOLD_LOW)
  {
    SPRINKLER_ACTIVATION_STATUS = true;
    digitalWrite(SPRINKLER_CONTROL_PIN, HIGH); // Turn on relay
  }
  else if (soilMoisturePercentage > MOISTURE_THRESHOLD_HIGH)
  {
    SPRINKLER_ACTIVATION_STATUS = false;
    digitalWrite(SPRINKLER_CONTROL_PIN, LOW);  // Turn off relay
  }

  // Print status
  Serial.print("Soil Moisture Percentage: ");
  Serial.print(soilMoisturePercentage);
  Serial.println("%");

  Serial.print("Sprinkler: ");
  Serial.println(SPRINKLER_ACTIVATION_STATUS ? "ON" : "OFF");

  // Send data to ThingSpeak
  ThingSpeak.setField(1, soilMoisturePercentage);
  ThingSpeak.setField(2, SPRINKLER_ACTIVATION_STATUS);

  int x = ThingSpeak.writeFields(myChannelNumber, myApiKey);
  if (x == 200) {
    Serial.println("Data sent to ThingSpeak successfully");
  } else {
    Serial.println("Failed to send data to ThingSpeak");
  }

  Serial.println("-------------");

  delay(15000);
}