Question

我无法在串行监视器中运行AT命令。（均设置NL＆amp; CR + 9600波特）我按照本教程here。

设备：

Arduino MEGA 2560
蓝牙模块HC-05（ZS-040）
Ubuntu 16.04

这是我连线的方式：

我想提一下，在此之前我连线多次没有电阻但不超过3-4分钟。

这是我使用的代码：

// Basic Bluetooth test sketch 5a for the Arduino Mega. 
// AT mode using button switch
// HC-05 with EN pin and button switch
//
// Uses serial with the host computer and serial1 for communication with the Bluetooth module
//
//  Pins
//  BT VCC to Arduino 5V out. Disconnect before running the sketch
//  BT GND to Arduino GND
//  BT RX (through a voltage divider) to Arduino TX1 (pin 18)
//  BT TX  to Arduino RX1 (no need voltage divider)   (pin 19)
//
// When a command is entered in to the serial monitor on the computer 
// the Arduino will relay it to the Bluetooth module and display the result.
//

char serialByte = '0';
const byte  LEDPIN = 13; 

void setup() 
{
    pinMode(LEDPIN, OUTPUT);

    // communication with the host computer
    Serial.begin(9600);  

    Serial.println("Do not power the BT module");
    Serial.println(" ");
    Serial.println("On the BT module, press the button switch (keep pressed, and at the same time power the BT module");
    Serial.println("The LED on the BT module should now flash on/off every 2 seconds");
    Serial.println("Can now release the button switch on the BT module");
    Serial.println(" ");
    Serial.println("After entering AT mode, type 1 and hit send");
    Serial.println(" ");


    // wait for the user to type "1" in the serial monitor
    while (serialByte !='1')
    {
        if ( Serial1.available() )   {  serialByte = Serial1.read();  }
    }  


    // communication with the BT module on serial1
    Serial1.begin(38400);

    // LED to show we have started the serial channels
    digitalWrite(LEDPIN, HIGH);  

    Serial.println(" ");
    Serial.println("AT mode.");
    Serial.println("Remember to to set Both NL & CR in the serial monitor.");
    Serial.println("The HC-05 accepts commands in both upper case and lower case");
    Serial.println(" "); 
}


void loop() 
{
    // listen for communication from the BT module and then write it to the serial monitor
    if ( Serial1.available() )   {  Serial.write( Serial1.read() );  }

    // listen for user input and send it to the HC-05
   if ( Serial.available() )   {  Serial1.write( Serial.read() );  }
}

LED上的闪光灯应每2秒1秒变为开/关 1秒钟关闭。这表示AT模式。你现在可以发布了按钮开关。

即使LED像所描述的那样闪烁（引自上文）我在串行监视器中输入1没有得到任何响应。

这就是我的串行监视器在运行所有内容之后的样子：

Answer 1

<强>解决方案

连接：

蓝牙RXD到Arduino Mega引脚11
蓝牙TXD到Arduino Mega引脚10
蓝牙VCC到Arduino Mega 5V
蓝牙GND至Arduino Mega GND

我使用了这段代码：

#include <SoftwareSerial.h>

#define RxD 10
#define TxD 11

SoftwareSerial BTSerial(RxD, TxD);

void setup(){
  // replace BAUDRATE as suggested
  BTSerial.begin(BAUDRATE);
  Serial.begin(9600);
  BTSerial.print("AT\r\n");
}

void loop(){

  if (BTSerial.available())
    Serial.write(BTSerial.read());

  if (Serial.available())
    BTSerial.write(Serial.read());

}

按照上面的教程中的说明设置AT模式后。

我尝试使用BAUDRATE从9600到460800运行代码：

对我来说9600是我HC-05的正确波特率。

尝试将HC-05（ZS-040）设置为AT模式时，串行监视器不响应输入

1 个答案: