如何使用基于HM-10蓝牙模块的BLE Shield？

Question

我是 arduino 项目的新手。我想请你帮忙。我从 (http://imall.iteadstudio.com/development-platform/arduino/shields/im130704001.html) 为 Arduino 购买了 BLE Shield。他们使用 Hm-10 蓝牙模块 (http://www.jnhuamao.cn/bluetooth.asp?ID=1) 制作了这个盾牌。 Itead Studio 没有使用此屏蔽的示例代码。我不知道如何对其进行编程或从 Arduino 发送 AT 命令。

我阅读了数据表 (ftp://imall.iteadstudio.com/Shield/IM130704001_ITEAD_BLE_Shield/DS_IM130704001_ITEAD_BLE_Shield.pdf) 上的“AT 命令”，并尝试使用此代码 (http://arduino.cc/en/Reference/SoftwareSerial) 从 arduino 向 BLE shield 发送“AT 命令”，但我只收到了返回的命令。

这里有人用过这个 HM-10 蓝牙模块吗？

我需要一些 arduino 草图寻求帮助！

Answer 1

#include <SoftwareSerial.h>

  int led         = 13;
  int bluetoothTx = 2;
  int bluetoothRx = 3;
  SoftwareSerial bluetooth(bluetoothTx, bluetoothRx); 
  int baudrate[8] ={4800,9600,14400,19200,28800,38400,57600,115200};
  int i = 1;

void setup() {
  Serial.begin(9600);
  bluetooth.begin(9600);
  while(!Serial){}

  Serial.write("AT sent");
  delay(500);
  bluetooth.write("AT+NAME?");
  delay(500);
  while (bluetooth.available()) {
     Serial.write(bluetooth.read());
   }
  delay(100);
  Serial.println("");

  bluetooth.write("AT+POWE3");
  delay(500);
  while(bluetooth.available()) 
  {
    Serial.write(bluetooth.read());
  }
  delay(100);
  Serial.println("");

  delay(500);
  bluetooth.write("AT+CHAR?");
  delay(500);
  while (bluetooth.available()) {
     Serial.write(bluetooth.read());
   }
  delay(100);
  Serial.println("");

  delay(500);
  bluetooth.write("AT+NAMEFlightline"); //Check Status
  delay(500);
  while (bluetooth.available()) {
      Serial.write((char)bluetooth.read());

    }

  Serial.println("");
  bluetooth.write("AT+CHAR0x2901"); //add charicteristic
  delay(500);
  while (bluetooth.available()) {
      Serial.write(bluetooth.read());

    }
  Serial.println("");
  bluetooth.write("AT+RELI0"); 
  delay(500);
  while (bluetooth.available()) {
      Serial.write(bluetooth.read());
    }
  Serial.println("");
  bluetooth.write("AT+SHOW1");
  delay(100);
  while (bluetooth.available()) {
      Serial.write(bluetooth.read());

    }
  Serial.println("");

  pinMode(led,OUTPUT);
  digitalWrite(led,HIGH);
}

void testAllBaudRates(){
  for(int j=0; j<8; j++)
   {
      bluetooth.begin(baudrate[j]);
      delay(100);
      Serial.println("boud rate " + String(baudrate[j],DEC) +" i-> "+String(j,DEC));
     // Serial.println("");
      bluetooth.write("AT");
      delay(500);
      while (bluetooth.available()) {
        Serial.write(bluetooth.read());
        Serial.println();
       }
       delay(100);
   }
}                                            

// and now a few blinks of the  LED, 
// so that we know the program is running

void loop()
{
  //Read from bluetooth and write to usb serial
  while(bluetooth.available())
  {
    char toSend = (char)bluetooth.read();
    if(toSend == 'x'){
       digitalWrite(led,HIGH);
       Serial.println("set high");
       bluetooth.write("RXOK");
    }else if(toSend == 'y'){
      digitalWrite(led,LOW);
      Serial.println("set low");
      bluetooth.write("RXOK");
    }
    Serial.print(toSend);

  }

  //Read from usb serial to bluetooth
  while(Serial.available())
  {
    char toSend = (char)Serial.read();
    bluetooth.write(toSend);
    Serial.print(toSend);
  }
}

看看我上面的草图，我有几件事要指出我浪费了时间。

确保你有这条线

while(!Serial){}

或者您可能有一个工作屏蔽，但由于串行监视器没有准备好而错过响应。

请记住，如果蓝牙模块连接到设备，您将不会收到来自串行监视器的命令的响应。当灯停止闪烁时，它已连接到设备。

如果你运行这个草图，你应该得到这个输出

AT sent
OK+Set:3
OK+Get:0x2901  <- this may be blank the first time you run it
OK+Set:Flightline
OK+Set:0x2901
OK+Set:0
OK+Set:1

在这里可以找到最全面的 AT 命令列表

[All the AT commands and a good explanation][1]

您需要像我在这里所做的那样设置设备的特性

bluetooth.write("AT+CHAR?");

或者你会发现它可以连接到 iOS 和 Android

如果您要连接到 Android，请使用 BluetoothLE 类而不是蓝牙类。

Answer 2

您可以使用 this sketch 和波特率自动检测来控制您的 HM-10。这是Apploader project 的一部分，允许通过 BLE 上传到 Arduino 板。

Answer 3

这也有点晚了，但是试试下面的代码，如果你发送它“AT”它应该会给你一个“OK”：

#include <SoftwareSerial.h>  

int bluetoothTx = 2;  // TX-O pin of bluetooth mate, Arduino D2
int bluetoothRx = 3;  // RX-I pin of bluetooth mate, Arduino D3

SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);

void setup()
{
  Serial.begin(9600);  // Begin the serial monitor at 9600bps

  bluetooth.begin(115200);  // The Bluetooth Mate defaults to 115200bps
  delay(100);  // Short delay, wait for the Mate to send back CMD
  bluetooth.println("U,9600,N");  // Temporarily Change the baudrate to 9600, no parity
  // 115200 can be too fast at times for NewSoftSerial to relay the data reliably
  bluetooth.begin(9600);  // Start bluetooth serial at 9600
}

void loop()
{
  if(bluetooth.available())  // If the bluetooth sent any characters
  {
    // Send any characters the bluetooth prints to the serial monitor
    Serial.print((char)bluetooth.read());  
  }
  if(Serial.available())  // If stuff was typed in the serial monitor
  {
    // Send any characters the Serial monitor prints to the bluetooth
    bluetooth.print((char)Serial.read());
  }
  // and loop forever and ever!
}