> For the complete documentation index, see [llms.txt](https://learn.pakronics.com.au/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://learn.pakronics.com.au/seed-studio/grove-modules/actuator/grove-ble_v1.md). # 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. [![](https://raw.githubusercontent.com/SeeedDocument/common/master/Get_One_Now_Banner.png)](http://www.seeedstudio.com/Grove-BLE-p-1929.html) ## 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](http://wiki.seeed.cc/Grove_System/) ## Platforms Supported ### 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 ![](https://raw.githubusercontent.com/SeeedDocument/Grove-BLE_v1/master/img/Grove-BLE_connection1.png) 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** ``` #include //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 //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 } ``` ## Resources * [BLE\_apk\_for\_Android](https://raw.githubusercontent.com/SeeedDocument/Grove-BLE_v1/master/res/HMBLEComAssistant.rar) * [Datasheet of BLE module](https://raw.githubusercontent.com/SeeedDocument/Grove-BLE_v1/master/res/Bluetooth4_en.pdf) * [Schematic](https://raw.githubusercontent.com/SeeedDocument/Grove-BLE_v1/master/res/Grove-BLE_v1.0.zip)