Question

我正在尝试将HC-05与Arduino UNO一起用于我正在进行的可穿戴设备项目。我想通过不要求用户更改硬件以进入AT模式，而不必让他们必须输入AT命令来实现“自动化”连接。为此，我使用了在github：https://github.com/jdunmire/HC05上找到的HC-05库。最终，我将要搜索设备（AT + INQ），将Bluetooth地址存储为字符串，并检查与每个地址相对应的每个设备的名称。然后，我将连接到具有特定名称的服务器。

我遇到了很多问题，所以我认为我将从最常见的问题开始。

当尝试运行许多不同的命令（AT + ORGL，AT + INIT，AT + INQM，AT + INQ，AT + UART只是为了列举一些最常见的中断命令）时，我常常会得到响应“超时” 1”而不是“ OK”。

这种情况经常发生，我不确定为什么...有时功能会超时，我会打开和关闭设备，然后突然它们会再次起作用（反之亦然）。

下面是我编写的简单代码，试图使用“ AT + ORGL”复制结果，而您知道什么，相同的结果...

#include "HC05.h"

#ifdef HC05_SOFTWARE_SERIAL
#include <SoftwareSerial.h>
HC05 btSerial = HC05(A2, A5, A3, A4);  // cmd, state, rx, tx
#else
HC05 btSerial = HC05(3, 2);  // cmd, state
#endif

#ifdef DEBUG_HC05
#ifdef DEBUG_SW_PORT
  extern SoftwareSerial DEBUG_PORT;      //This will allow me to print to serial without sending to BT
#endif
#endif

void setup() {
DEBUG_BEGIN(38400);
 DEBUG_PRINTLN("Setup");
  delay(3000);  // this delay is for debugging convenience only
 DEBUG_PRINTLN("DelayComplete");
 btSerial.findBaud();
 btSerial.cmd("AT"); //Let's test to make sure the KEY pin is connected well
 btSerial.cmd("AT+ORGL");
}

void loop() {

}

这是串行监视器中的结果：

Setup
DelayComplete
findBaud
Trying 4800... x
Trying 9600... x
Trying 19200... x
Trying 38400... Found.
AT
OK
AT+ORGL
timeout 1

Here is a picture of my Fritzing

接线是所有库示例中使用的接线。似乎错误“超时1”在HC05.cpp库中的此处编码：

int HC05::cmd(const char* cmd, unsigned long timeout)
{
int recvd = 0;
DEBUG_PRINTLN(cmd);

setCmdPin(HIGH);
// No spec for how long it takes to enter command mode, but 100ms
// seems to work- assuming the output has been drained.
delay(100);
_btSerial.write(cmd);
_btSerial.write("\r\n");
_btSerial.setTimeout(timeout);
do
{
    // ATTENTION: At least through Arduino v1.0.3, it is not possible
    //            to tell the difference between a timeout and
    //            receiving only the termination character (NL in this
    //            case), because the termination character is not
    //            returned and timeout is not returned as a unique
    //            indication.
    //            In this case the result would be an early return
    //            of a multiline response before the OK is received.
    //            The return would incorrectly indicate an error (no
    //            OK response).
    recvd = _btSerial.readBytesUntil('\n',_buffer,_bufsize);
    if (recvd > 0)
    {
        DEBUG_WRITE((uint8_t *)_buffer,recvd);
        DEBUG_WRITE('\n');
    }
    else
    {
        DEBUG_PRINTLN("timeout 1");
    }
}
while ((recvd > 0) && (_buffer[0] != 'O' || _buffer[1] != 'K'));

setCmdPin(LOW);

// Empirically determined that it takes some time to reliably exit
// command mode. The appeared to be a baud rate dependency and with
// >100ms required at 9600 baud.
delay(150);
return((_buffer[0] == 'O' && _buffer[1] == 'K'));}
}

我不确定如何解决错误。任何建议都非常感谢！

我相信这是我正在使用的HC-05：http://www.dsdtech-global.com/2017/07/dsd-tech-hc-06-wireless-bluetooth.html

尝试将HC-05库用于自动AT命令时出错

0 个答案: