stupid shit (принимающая)

char s;
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
Serial.write(0xA1);
Serial.write(0xF1);
//Serial.write(0x02);
}

void loop() {
  // put your main code here, to run repeatedly:
if (Serial.available()>0){
  s=Serial.read();
  Serial.println(s,HEX);
}

}