struct
{

  char text_1[8]; // // buffer of size 8, which is the minimal size to hold string "-XX.X°C\0"

  uint8_t connect_flag;

} RemoteXY;

void setup() 
{
  RemoteXY_Init (); 
}

void loop() 
{ 
  RemoteXY_Handler ();

  val = analogRead(tempPin);
  float mv = ( val/1024.0)*5000;
  float cel = mv/10;

  // This condition is a protection against buffer overflow, in case of bad reading
  // It should never happen but, better be safe than sorry
  if ( cel > -100.f && cel < 1000.f )
  {
    dtostrf( cel, 5, 1, RemoteXY.text_1 );
    strcat( RemoteXY.text_1, "°C" );
  }
}