Grove-BLE v1
Grove - BLE v1 (Grove - Bluetooth Low Energy v1) 采用低功耗蓝牙模块 -- HM-11，基于支持 AT 指令的 TI CC2540 芯片。作为 Grove 产品，Grove - BLE 可以很方便地通过 Base Shield 与 Arduino 板一起使用。
规格参数¶
| 项目 | 参数 |
|---|---|
| 蓝牙版本 | Bluetooth Specification V4.0 BLE |
| 工作频率 | 2.4GHz ISM band |
| 调制方法 | GFSK(Gaussian Frequency Shift Keying) |
| 射频功率 | -23dbm, -6dbm, 0dbm, 6dbm, can modify through AT Command AT+POWE |
| 传输速率 | Asynchronous: 6K Bytes, Synchronous: 6K Bytes |
| 灵敏度 | ≤-84dBm at 0.1% BER |
| 安全性 | 认证与加密 |
| Service | Central & Peripheral UUID FFE0,FFE1 |
| 电源 | 3.3v - 5v |
| 工作温度 | –5 ~ +65 摄氏度 |
| 大小尺寸 | 40cm x 20cm |
| 工作电流 | < 10 mA |
| Sourcing Current | < 20 mA |
| 睡眠电流 | < 1 mA |
Attention
HM-11 的电源是 3.3v，而 Grove - BLE 是 3.3V 至 5V。Tip
关于 Grove 模块的更多信息请点击 [Grove System](
http://wiki.seeedstudio.com/cn/Grove_System/)
Platforms Supported¶
引出线¶
Grove 有四根线缆 : GND, VCC, RX, TX。
设计特点¶
我们使用 TD6810 芯片作为稳压器，所以供电范围是 3.3v 至 5v。 此外，还有一个电平转换电路，确保数据传输的准确性。
AT 指令集¶
1）Query module address (查询模块地址)
Send： AT+ADDR?
Receive：OK+LADD:address
2） Query baud rate (查询波特率)
Send：AT+BAUD?
Receive：OK+Get:[para1]
Range： 0~8; 0--9600，1--19200，2--38400，3--57600，4--115200，5--4800，6--2400，7--1200，8--230400
Default: 0--9600.
Set baud rate (设置波特率)
Send：AT+BAUD[para1]
Receive：OK+Set:[para1]
Ex.：Send ：AT+BAUD1 ，Receive：OK+Set:1. The Baud rate has been set to 19200
Note
如果设置为 7，下次上电后，模块将不支持任何 AT 指令，直到 PIO0 被按下，模块会将波特率改为 9600。3） Try connect an address (尝试连接一个地址)
Send：AT+CON[para1]
Receive：OK+CONN[para2]
Range ：A,E,F
Ex.：Try to connect an device which MAC address is 00:17:EA:09:09:09
Send: AT+CON0017EA090909
May receive a reply: OK+CONNA → Accept request, connecting ; OK+CONNE → Connect error ; OK+CONN → Connected , if AT+NOTI1 is setup ; OK+CONNF → Connect Failed , After 10 seconds
Note
只使用中心角色。如果远程设备已经连接到其他设备或关闭，大约 10 秒后会收到 “OK + CONNF”。4） Clear Last Connected device address (清除上次连接的设备地址)
Send：AT+CLEAR
Receive：OK+CLEAR
5） Query Module Work Mode (查询模块工作模式)
Send：AT+MODE?
Receive：OK+Get:[para]
Range： 0~2;
0--Transmission Mode, 1--PIO collection Mode + Mode 0, 2--Remote Control Mode + Mode 0 .
Default: 0
Set Module Work Mode (设置模块工作模式)
Send：AT+MODE[]
Receive：OK+Set:[para]
6） Query Module name (查询模块名称)
Send：AT+NAME?
Receive：OK+NAME[para1]
Set Module name (设置模块名称)
Send：AT+NAME[para1]
Receive：OK+Set:[para1]
Ex.：Send: AT+NAMESeeed， Receive : OK+Set:Seeed
Note
下次上电后名称会改变。7） Query Pin Code (查询引脚号)
Send：AT+PASS?
Receive：OK+PASS:[para1]
Range : 000000~999999.
Default : 000000.
Set Pin Code (设置引脚号)
Send: AT+PASS[para1]
Receive：OK+Set:[para1]
8） Restore all setup value to factory setup (将所有设置值恢复到出厂设置)
Send：AT+RENEW
Receive：OK+RENEW
9） Restart module (重新启动模块)
Send：AT+RESET
Receive：OK+RESET
10）Query Master and Slaver Role (查询主从角色)
Send：AT+ROLE[para1]
Receive：OK+Set:[para1]
Range : 0~1;
0--Peripheral : 1--Central : Default: 0.
关于 AT 指令集的更多信息请参考 BLE 模块的芯片数据手册。
SoftwareSerial 通信¶
Grove - BLE 可以作为主设备或从设备使用，可以通过不同的演示程序使用。如果您要使用以下 SoftwareSerial 程序，请参考上图中的连接方式。 TX→D2, RX→D3。
打开 Arduino IDE，复制下面的程序并上传到 Arduino/Seeeduino 板上。然后两个 BLE 模块可以相互通信。
Demo : BLE Slave
#include <SoftwareSerial.h> //Software Serial Port
#define RxD 2
#define TxD 3
#define DEBUG_ENABLED 1
SoftwareSerial BLE(RxD,TxD);
void setup()
{
Serial.begin(9600);
pinMode(RxD, INPUT);
pinMode(TxD, OUTPUT);
setupBleConnection();
}
void loop()
{
char recvChar;
while(1){
if(BLE.available()){//check if there's any data sent from the remote BLE
recvChar = BLE.read();
Serial.print(recvChar);
}
if(Serial.available()){//check if there's any data sent from the local serial terminal, you can add the other applications here
recvChar = Serial.read();
BLE.print(recvChar);
}
}
}
void setupBleConnection()
{
BLE.begin(9600); //Set BLE BaudRate to default baud rate 9600
BLE.print("AT+CLEAR"); //clear all previous setting
BLE.print("AT+ROLE0"); //set the bluetooth name as a slaver
BLE.print("AT+SAVE1"); //don't save the connect information
}
Demo : BLE Master
#include <SoftwareSerial.h> //Software Serial Port
#define RxD 2
#define TxD 3
#define DEBUG_ENABLED 1
SoftwareSerial BLE(RxD,TxD);
void setup()
{
Serial.begin(9600);
pinMode(RxD, INPUT);
pinMode(TxD, OUTPUT);
setupBleConnection();
}
void loop()
{
char recvChar;
while(1){
if(BLE.available()){//check if there's any data sent from the remote BLE
recvChar = BLE.read();
Serial.print(recvChar);
}
if(Serial.available()){//check if there's any data sent from the local serial terminal, you can add the other applications here
recvChar = Serial.read();
BLE.print(recvChar);
}
}
}
void setupBleConnection()
{
BLE.begin(9600); //Set BLE BaudRate to default baud rate 9600
BLE.print("AT+CLEAR"); //clear all previous setting
BLE.print("AT+ROLE1"); //set the bluetooth name as a master
BLE.print("AT+SAVE1"); //don't save the connect information
}