#include <WiFi.h>
#include <ThingSpeak.h>
char ssid[] = "Redmi 9";
char pass[] = "0987654321";  
WiFiClient client;
long myChannelNumber = 2729042;
const char * myWriteAPIKey = "DCXYT5FVRB59AOWX";
int statusCode;


const int relayPin = 32;
const int buzzerPin = 35;
 int trigger=4;
int echo=5;
int motor_status=0;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
 

  pinMode(trigger, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(25, OUTPUT);
  pinMode(26, OUTPUT);
  pinMode(27, OUTPUT);
  pinMode(relayPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
}

int finding_distance(){
  digitalWrite(trigger, HIGH);
  delay(100);
  digitalWrite(trigger, LOW);
  float a=pulseIn(echo, HIGH);
  return(a*0.034/2);
}
void loop() {
   if(WiFi.status() != WL_CONNECTED)  
  {
  Serial.print("Attempting to connect");
    while(WiFi.status() != WL_CONNECTED)
    {
    WiFi.begin(ssid, pass); 
    Serial.print(".");
    delay(5000);
    }
  Serial.println("\nConnected.");
  } 


  int distance=finding_distance();
  Serial.println(distance);
  if(distance>=300 )
  {
  digitalWrite(27, HIGH);
  Serial.println(" TANK FULL");
  digitalWrite(26, LOW);
  digitalWrite(25, LOW);
  digitalWrite(relayPin, LOW);
  digitalWrite(buzzerPin, LOW);
  motor_status=0;
  }
  else if(distance>200 && distance<300)
  {
    digitalWrite(26, HIGH);
    Serial.println("MEDIUM LEVEL");
    digitalWrite(27, LOW);
    digitalWrite(25, LOW);
    digitalWrite(buzzerPin, LOW);
    motor_status=0;
  }
  else if(distance<=200)
  {
    digitalWrite(25, HIGH);
    Serial.println("TANK LOW");
    digitalWrite(26, LOW);
    digitalWrite(27, LOW);
    digitalWrite(relayPin, HIGH);
    delay(2000); 
    digitalWrite(buzzerPin, HIGH);
    delay(1000); // Wait for 1 second
    digitalWrite(buzzerPin, LOW);
    motor_status=1;
  }
  ThingSpeak.setField(1, distance);
  ThingSpeak.setField(2, motor_status);
  



  statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);

if(statusCode == 200) { //successful writing code
Serial.println("Channel update successful.");
}
else {
Serial.println("Problem Writing data. HTTP error code :" +
String(statusCode));
}
  // put your main code here, to run repeatedly:
   // this speeds up the simulation
}