ISR(USART_RX_vect) {
 static char ReceivedText[200];

 static uint8_t k = 0;

 if(UDR0 == '|') {
   kirjoitakysymys(ReceivedText);
   k = 0
   memset(ReceivedText, 0, sizeof(ReceivedText));
 }
 else ReceivedText[k] = UDR0;
 k++;

}