Bluetooth V4.0 HM-11 BLE Module

This is a SMD BLE module used in our BLE Bee and Xadow BLE. It is based on TI cc2541 chip, enables robust network nodes to be built with low total bill-of-material costs and highly suited for ultralow power consumption systems. The module is small and easy to use, with the preprogrammed firmware of manufacturer, you could quickly build BLE communications via its AT command. Supporting BLE communications with iphone, ipad and Android 4.3.

Features

Bluetooth protocol: Bluetooth Specification V4.0 BLE
Working frequency: 2.4 GHz ISM band
Interface way: a serial port
Open environment within 30 meters can realize communication between modules
To send and receive no byte limit between modules
Modulation method: GFSK (Gaussian Frequency Shift Keying)
Transmission power: - DBM, 23-6 DBM, 0 DBM, 6 DBM, can be modified by the AT command
use TI CC2540 chip, configuration space of 256 KB, support the AT command, the user can according to need to
change the role (master, slave mode) and the serial port baud rate, name of equipment, matching parameters such as passwords, use agile.
power supply: + 3.3 VDC 50 mA
working temperature: - 5 ~ + 65 Centigrade

Specification

Specification	Value
Microprocessor	CC2541
Resources	Support the AT command, the user can according to need to change the role (master, slave mode) and the serial port baud rate,name of equipment,Matching parameters such as password, the use of flexible.
Outline Dimension	13.5mm x 18.5mm x 2.3mm
Power supply	3.3V
Communication Protocol	Uart(3.3V LVTTL)
IO counts	2
Key input IO	1
LED Indicators IO	1
Connectivity	Socket compatible with XBee

Electrical Characteristics

Specification	Min	Typ	Max	Unit
Max Input Voltage	-0.3		3.6	V
Working Input Voltage	2.0	3.3	3.6	V
Transmit Current		15		mA
Receive Current		8.5		mA
Deep Sleep Current		600		uA
Operating Temperature	-40		+65	°C

Pin definition

Pin	Name	Description
1	UART_RTS	UART
2	UART_TX	UART
3	UART_CTS	UART
4	UART_RX	UART
5	NC
6	NC
7	NV
8	NV
9	VCC	Power supply 3.3V
10	NC
11	RESETB	Reset, active low at least in 5ms
12	GND	GND
13	PIO3	IO port, used for connect to DHT11/DS18B20
14	PIO2	Digital input, output
15	PIO1	LED indicator
16	PIO0	Button pin

AT commands & Configuration

1） Query the native MAC address
Send: AT + ADDR?
Send after a successful return: OK + LADD: MAC address (address for 12 string)

2） Query the baud rate
Send: AT+BAUD?
Send after a successful return: OK + Get: [para1]
Scope of para1:0 ~ 8. The parameters corresponding to: 0 represents 9600, 1, 2, 9600, 38400, on behalf of the representative representative of 57600, 115200, 5, 4800, 6, 7 represents 1200, 1200 2400. The default baud rate to 9600.

3） Set the baud rate
Send: AT+BAUD[para1]
Send after a successful return: OK+Set:[para1]
Example: send: AT + BAUD1, return: OK + Set: 2.The baud rate is set to 19200.
Note: after the switch to the 1200, module will no longer support the configurations of the AT command, and press the PIO0 under standby, module can restore the factory Settings.Do not recommend using the baud rate.After setting the baud rate, modules should be on electricity, anew set parameters can take effect.

4） from the device connected to the bluetooth address specified
Send: AT+CON[para1]
Send after a successful return: OK+CONN[para2]
Para2 range is: A, E, F
Example: from the bluetooth address is: 0017EA0943AE, sending the AT + CON0017EA0943AE, module returns: OK + CONNA or OK + + CONNF CONNE or OK.

5） removal equipment matching information
Send: AT + CLEAR
Send after a successful return: OK + CLEAR
Clear success had connected device address code information.

6） query module working mode
Send: AT + MODE?
Send after a successful return: OK + Get: [para]
Para: the range of 0 ~ 2. 0 represents passthrough mode, on behalf of the PIO acquisition + remote control + 1 passthrough, 2 representative passthrough + remote control mode.The default is 0.

7） set module working mode:
Send: AT + MODE []
Send after a successful return: OK + Set: [para]

8） query device name
Send: AT + NAME?
Send after a successful return: OK + NAME [para1]

9） set the device name
Send: AT + NAME [para1]
Send after a successful return: OK + Set: [para1]
Example: Set the device name to Seeed, sending the AT + NAMESeeed, return OK + Set: Seeed AT this time, the name of the bluetooth module has been changed to Seeed. Note: after the instruction execution, required to electricity, set the parameters of the approval.

10） query matching password
Send: AT + PASS?
Send after a successful return: OK + PASS: [para1]
Para1 range is 000000 ~ 999999, the default is 000000.

11） pairing set password
Send the AT + PASS [para1]
Send after a successful return: OK + Set: [para1]

12） restore factory Settings
The AT + RENEW send
Send after a successful return: OK + RENEW
Restore the default factory Settings module, the module Settings will be reset so, back to the factory with the status of the factory default, delay module 500 ms after the restart.If no need, please be careful.

13） module reset
Send: AT + RESET
Send after a successful return: OK + RESET
After the instruction execution module will delay 500 ms after the restart.

14） set the master-slave mode
Send: AT + ROLE [para1]
Send after a successful return: OK + Set: [para1]

Example Code

//master

/*
 
 This example code is in the public domain.
 
 */
#include <SoftwareSerial.h>

SoftwareSerial mySerial(2, 3); // RX, TX

void setup()  
{
  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }


  Serial.println("Goodnight moon!");

  // set the data rate for the SoftwareSerial port
  mySerial.begin(9600);
  // set master
  mySerial.print("AT+ROLE1"); 
  delay(10000);

 
}

void loop() // run over and over
{
  
    // set the data rate for the SoftwareSerial port
  mySerial.print("test I am master  ");
  delay(10000);  
  if (mySerial.available())
    Serial.write(mySerial.read());
  if (Serial.available())
    mySerial.write(Serial.read());
}

//slave

/*
 
 This example code is in the public domain.
 
 */
#include <SoftwareSerial.h>

SoftwareSerial mySerial(2, 3); // RX, TX

void setup()  
{
  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }


  Serial.println("Goodnight moon!");

  // set the data rate for the SoftwareSerial port
  mySerial.begin(9600);
  // set slave
  mySerial.print("AT+ROLE0"); 
  delay(10000);

 
}

void loop() // run over and over
{
  
    // set the data rate for the SoftwareSerial port
  mySerial.print("test I am slave ");
  delay(10000);  
  if (mySerial.available())
    Serial.write(mySerial.read());
  if (Serial.available())
    mySerial.write(Serial.read());
}

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