const int LM35_Pin = A0;
const int buzzer=8;              //Set digital IO foot control buzzer

void setup() {
  Serial.begin(9600);
  analogReference(INTERNAL); 
  pinMode(buzzer,OUTPUT);        
}

void loop() {
  float temp;
  
  temp = analogRead(..... )....;

  Serial.println(temp);

  if(temp > 22){    
      digitalWrite(buzzer,...);
      delay(....);
      digitalWrite(buzzer,...);
  }
  
  delay(3000);
  
}