void setup() {
  Serial.begin(115200);
  pinMode(A2, INPUT);
}

void seriell( int adw, bool TMP36 )
{
  float U, Temp; String sensor = "TMP36"; 
  U = 5.0 * adw / 1.023 ; 
  if( TMP36 == true)  Temp = (U-500) / 10.0 ;  
  else                
  { Temp = U / 10.0 ; sensor = "LM35"; }

  Serial.print(sensor + ": ADW = " + String( adw ) + ": ");
  Serial.print( U, 1 ); 
  Serial.print(" mV = " );
  Serial.print( Temp, 1 );
  Serial.println( "°C ") ; 
  delay(100);
}

void loop() {
  static int adw_alt[2] = {-42, -42}, adw[2];

  for( byte i = 0; i<2; i++)
  {
    adw[i] = analogRead( i + A1); 
    if( abs( adw_alt[i] - adw[i] ) > 3 ) 
    {
      seriell( adw[i], i==0 ); // A2=> LM35, A1 => TMP36
      adw_alt[i] = adw[i];   
    }
  }
}