void setup() {
  Serial.begin(38400);
  Serial3.begin(38400);
}

void loop() {
  while (Serial3.peek() != -1) {
    for (int x = 1; x < 10; x++) {
      if (Serial3.peek() < 0x10) {
        Serial.print("0");
      }
      Serial.print(Serial3.read(), HEX); Serial.print(" ");
    }
    Serial.println();
  }
  delay(1000);
}