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

int trig =12;
int echo =25;
float RELAY=19;
float yellow =18;
float green=21;
float red =19;
float distance;

char ssid[] = "Wokwi-GUEST";
char pass[] = "";

WiFiClient client;
long myChannelNumber = 2651439;
const char * myWriteAPIKey = "H9KC7QGNEY9DJADG";
int statusCode;


void setup() {
 Serial.begin(115200);
 pinMode(trig, OUTPUT);
 pinMode(echo, INPUT);
 pinMode(RELAY, OUTPUT);
 pinMode(yellow, OUTPUT);
 pinMode(green, OUTPUT);
 pinMode(red,OUTPUT);
 tone(22, OUTPUT);

 WiFi.mode(WIFI_STA);
 ThingSpeak.begin(client);
 
}
int ultraperformance(){
 digitalWrite(trig, LOW);
 delay(100);
 digitalWrite(trig, HIGH);
 delay(100);
 digitalWrite(trig, LOW);
 distance=pulseIn(echo,HIGH);
 return(distance*0.034/2)+1;
 }



void loop() {
 float actual_distance=ultraperformance();
 Serial.println(actual_distance);

 if (actual_distance>300 ) {
 digitalWrite(RELAY, LOW);
 digitalWrite(green, HIGH);
 digitalWrite(yellow, LOW);
 digitalWrite(red, LOW);
 Serial.println("WATER IS FULL");
 tone(22,10000);
 }

 else if(actual_distance>=200 && actual_distance <300 ){
 digitalWrite(yellow ,HIGH);
 digitalWrite(RELAY, LOW);
 digitalWrite(green, LOW);
 digitalWrite(red, LOW);
 Serial.println("WATER IS MEDIUM");
 tone(22,LOW);
 }

 else if(actual_distance>=0 && actual_distance<200){
 digitalWrite(red ,HIGH);
 digitalWrite(yellow , LOW);
 digitalWrite(green, LOW);
 digitalWrite(RELAY, LOW);
 Serial.println("WATER IS EMPTY");
 tone(22,100000);
 }
 else{
 digitalWrite(RELAY, LOW);
 digitalWrite(yellow, LOW);
 digitalWrite(red, LOW);
 tone (22,10000);
 }

 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.");
  } 
  {
 ThingSpeak.setField(1, actual_distance);

 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));
}
delay(10);
 }
}