问Arduino SoftwareSerial Rx/Tx引脚顺序错误？

EN

#include <SoftwareSerial.h>

const int Rx = 0;                           // pin 5 on ATtiny - DI/MOSI
const int Tx = 1;                           // pin 6 on ATtiny - DO/MISO
const int ButtonIn = 2;
const int OK_LED = 4;
int buttonState = 0;
SoftwareSerial serialBT(Rx, Tx);

void setup() 
{
  pinMode(ButtonIn, INPUT);
  pinMode(OK_LED, OUTPUT);
  serialBT.begin(9600);
}

void loop() 
{
  buttonState = digitalRead(ButtonIn);
  if (buttonState == 0)
  {  
    serialBT.print("$");                    // $$$ enters RN42 command mode
    serialBT.print("$");
    serialBT.print("$");
    delay(3000);

    serialBT.println("R,1");
    digitalWrite(OK_LED, HIGH);
    delay(5000);
    digitalWrite(OK_LED, LOW);
  }
}