How to use BLE Shield based on HM-10 bluetooth module?

I'm a new bie on arduino projects. I would like to ask you for some help. I bought a BLE Shield for Arduino from ( http://imall.iteadstudio.com/development-platform/arduino/shields/im130704001.html ). They made this shield using Hm-10 Bluetooth module(http://www.jnhuamao.cn/bluetooth.asp?ID=1). Itead Studio has no sample codes using this shield. I have no idea on how to program it or send AT commands from Arduino.

I read the “AT commands” at the data sheet (ftp://imall.iteadstudio.com/Shield/IM130704001_ITEAD_BLE_Shield/DS_IM130704001_ITEAD_BLE_Shield.pdf) and I tried to send "AT commands” from arduino to BLE shield using this code ( http://arduino.cc/en/Reference/SoftwareSerial ) but I only received the commands back.

Did anybody here ever use this HM-10 bluetooth module ?

I need some arduino sketch for help !

#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);
  }
}

Have a look at my sketch above I have a few things to point out that I wasted time on.

make sure you have the line

while(!Serial){}

Or you may get have a working shield but miss the responses as the serial monitor is no ready.

remember that you wont get a response from the blue-tooth module, with a command from the Serial Monitor if it is connected to a device. It is connected to the device when the light stops flashing.

if you run this sketch you should get this output

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

the most comprehensive list of AT commands can be found here

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

You will need to at Characteristics to the device as I have done here

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

or you will find it to connect to iOS and Android

If you are connecting to Android use the BluetoothLE Classes not Bluetooth ones.

You can use this sketch with baud rate autodetect to control your HM-10. This is a part of Apploader project that allows to upload to Arduino board over BLE.

This is a little late too, but try the following code, if you send it "AT" it should give you back an "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!
}

来源：https://stackoverflow.com/questions/19826749/how-to-use-ble-shield-based-on-hm-10-bluetooth-module

标签

bluetooth

arduino

bluetooth-lowenergy

hm-10