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      Grove BLE v1 Grove - BLE v1 (Grove - Bluetooth Low Energy v1) uses a Low Energy Bluetooth module -- HM-11, based on TI CC2540 chip, which has AT command support. As a Grove product it's convenient to use Grove - BLE with Arduino board via Base Shield. Parameters   Specifications Name BT Version Bluetooth Specification V4.0 BLE Working frequency 2.4GHz ISM band Modulation method GFSK(Gaussian Frequency Shift Keying) RF Power -23dbm, -6dbm, 0dbm, 6dbm, can modify through AT Command AT+POWE Speed Asynchronous: 6K Bytes, Synchronous: 6K Bytes Sensitivity ≤-84dBm at 0.1% BER Security Authentication and encryption Service Central & Peripheral UUID FFE0,FFE1 Supply Power 3.3v - 5v Working temperature –5 ~ +65 Centigrade Size 40cm x 20cm Working Current < 10 mA Sourcing Current < 20 mA Sleeping Current < 1 mA Attention The supply power of HM-11 is 3.3v, but the Grove - BLE is 3.3V to 5V. Tip More details about Grove modules please refer to Grove System Platforms Supported Arduino Raspberry Pi BeagleBone Wio LinkIt ONE Caution The platforms mentioned above as supported is/are an indication of the module's hardware or theoritical compatibility. We only provide software library or code examples for Arduino platform in most cases. It is not possible to provide software library / demo code for all possible MCU platforms. Hence, users have to write their own software library. Pinout Grove connector has four wires: GND, VCC, RX, TX. Features of Design We have used TD6810 chip as the voltage regulator, so the range of the supply power can be 3.3v to 5v. Also , there's a level shift circuit which make sure the accuracy of data transmission. AT Commands 1）Query module address Send： AT+ADDR? Receive：OK+LADD:address 2） Query baud rate 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 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 If setup to a value 7, After next power on, module will not support any AT Commands, until PIO0 is pressed, Module will change Baud to 9600. 3） Try connect an address 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 Only central role is used. If remote device has already connected to other device or shut down, “OK+CONNF” will received after about 10 Seconds. 4） Clear Last Connected device address Send：AT+CLEAR Receive：OK+CLEAR 5） Query Module Work Mode 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 Send：AT+MODE[] Receive：OK+Set:[para] 6） Query Module name Send：AT+NAME? Receive：OK+NAME[para1] Set Module name Send：AT+NAME[para1] Receive：OK+Set:[para1] Ex.：Send: AT+NAMESeeed， Receive : OK+Set:Seeed Note Name would change after next power on. 7） Query Pin Code Send：AT+PASS? Receive：OK+PASS:[para1] Range : 000000~999999. Default : 000000. Set Pin Code Send: AT+PASS[para1] Receive：OK+Set:[para1] 8） Restore all setup value to factory setup Send：AT+RENEW Receive：OK+RENEW 9） Restart module Send：AT+RESET Receive：OK+RESET 10）Query Master and Slaver Role Send：AT+ROLE[para1] Receive：OK+Set:[para1] Range : 0~1; 0--Peripheral : 1--Central : Default: 0. More AT commands please refer to the Datasheet of BLE module. SoftwareSerial Communication Grove - BLE can be used as a master or slave, you can use the one via different demos.If you are going to use the following SoftwareSerial program, please refer to the way of connection in the previous pic. TX→D2, RX→D3. Open Arduino IDE, copy the following program and upload it onto the Arduino/Seeeduino board. And then two BLE modules can communicate with each other. Demo : BLE Slave 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 #include #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() //Software Serial Port 19 { 20 char recvChar; 21 while(1){ 22 if(BLE.available()){//check if there's any data sent from the 23 remote BLE 24 recvChar = BLE.read(); 25 Serial.print(recvChar); 26 } 27 if(Serial.available()){//check if there's any data sent from the 28 local serial terminal, you can add the other applications here 29 recvChar = Serial.read(); 30 BLE.print(recvChar); 31 } 32 } 33 } 34 35 void setupBleConnection() 36 { 37 BLE.begin(9600); //Set BLE BaudRate to default baud rate 9600 38 BLE.print("AT+CLEAR"); //clear all previous setting 39 BLE.print("AT+ROLE0"); //set the bluetooth name as a slaver BLE.print("AT+SAVE1"); //don't save the connect information }   Demo : BLE Master 1 #include //Software Serial Port 2 #define RxD 2 3 #define TxD 3 4 5 #define DEBUG_ENABLED 1 6 7 SoftwareSerial BLE(RxD,TxD); 8 9 void setup() 10 { 11 Serial.begin(9600); 12 pinMode(RxD, INPUT); 13 pinMode(TxD, OUTPUT); 14 setupBleConnection(); 15 16 } 17 18 void loop() 19 { 20 char recvChar; 21 while(1){ 22 if(BLE.available()){//check if there's any data sent from the 23 remote BLE 24 recvChar = BLE.read(); 25 Serial.print(recvChar); 26 } 27 if(Serial.available()){//check if there's any data sent from the 28 local serial terminal, you can add the other applications here 29 30 31 32 33 34 35 36 37 38 39 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 }                                                                                            http://wiki.seeedstudio.com/Grove‐BLE_v1/ 9‐10‐18