#include <WiFi.h>
#include <ThingSpeak.h>
#include <HX711.h>




#define SECRET_SSID "Wokwi-GUEST"
#define SECRET_PASS ""
#define SECRET_CH_ID 2028875
#define SECRET_WRITE_APIKEY "KXOOQG0WJ0X8SAZC"

char ssid[] = SECRET_SSID;
char pass[] = SECRET_PASS;
int keyIndex = 0;

WiFiClient client;
unsigned long myChannelNum = SECRET_CH_ID;
const char * myWriteAPIKey = SECRET_WRITE_APIKEY;

const float BETA = 3950; // should match the Beta Coefficient of the thermistor


int buzzer = 2;
int led = 4;
void setup() 
{
  Serial.begin(9600);
  analogReadResolution(10);
  pinMode(led, OUTPUT);
  pinMode(buzzer, OUTPUT);
  
  while(!Serial){
    ; 
  }
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);


}

void loop() 
{
  
  if(WiFi.status() != WL_CONNECTED)
  {
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(SECRET_SSID);
    while(WiFi.status() != WL_CONNECTED)
    {
      WiFi.begin(ssid,pass);
      Serial.print(".");
      delay(5000);
    }
    Serial.println("\nConnected!!!");
  }
  
  int analogValue = analogRead(15);
  float celcius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  Serial.print("Temperature: ");
  Serial.print(celcius);
  Serial.println(" ℃");
   
  if(celcius>=35){
    Serial.println("\n High temperature");
    digitalWrite(led,HIGH);
    digitalWrite(buzzer, HIGH);
    delay(500);
    digitalWrite(led,LOW);
    digitalWrite(buzzer,LOW);
     }
  else{
Serial.println("\n Low temperature"); 
  delay(5000);}


int x = ThingSpeak.writeField(myChannelNum, 1, celcius, myWriteAPIKey);

if(x ==  200)
{
  Serial.println("Channel update successful");
}

else
{
  Serial.println("Problem updating channel.HTTP error code" + String(x));
}

  delay(5000);

}