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Microduino-Shiedl BT4.0 module is a plug-in device that supports Bluetooth 4.0 low energy standard.
Microduino-Shield BT4.0 module is a bluetooth serial port transparent transmission module, use the 27 PIN standard Microduino interface, support the Arduino board and derivatives, such as Microduino core.
The module is designed by player ogre_c.
Features
- Microduino-Shield BT4.0 use U type 27 PIN interface of Microduino, combines with other Microduino modult to use;
- Microduino-Shield BT4.0 use the HM-10 BLE as the bluetooth core module;
- TI CC2540 chip with 256Kb space;
- Support AT command，the serial baud rate, device name, matched passward can be changed, easy to use；
- Small, cheap, stackable, opened platfrom;
- Open source hardware circuit design, compatible with the Arduino IDE development environment for programming;
- Defines unified interface Microduino specification and contain rich peripheral modules. Set up the quick connection with other Microduino modules and sensors easily and flexibly.
- 2.54 pitch row female connector for easy integration into breadboard.
Specifications
- Communication forms: serial passthrough;
- Power：+3.3VDC 50mA；
- Bluetooth protocol：Bluetooth Specification V4.0 BLE；
- Service：Central & Peripheral UUID FFE0,FFE1；
- Working frequency：2.4GHz ISM band；
- Modulation method：GFSK(Gaussian Frequency Shift Keying)；
- Transmission power：≤4dBm；
- Sensitivity：≤-84dBm at 0.1% BER；
- Transmission rate：
- Asynchronous: 6 kbps；
- Synchronous: 6 kbps；
- State indicator：
- Two states：
- Flashing means module powered, no matched.
- Lighting means module has matched and can start communication.
- You can know the module's state by the indicator, easy to use.
Documents
Eagle PCB 文件:Microduino-BT Shield.zip
Main component
Development
Seril configuration
- Default serial configuration：
- Baud rate: 9600
- No check
- Data bits: 8
- Stop bit: 1
- Serial port on Arduino IDE's serial monitor：
- Set to："No line terminator"、"9600baud"
- For other serial debug software：
- Baud rate: 9600
- No check
- Data bits: 8
- Stop bit: 1
- We suggest to use Microduino Core 32u4 to debug this BT module:
- 32u4 module can use the USB to simulate the serial 0, and BT uses the 32u4's serial 1 (RX0,TX1), so you don't need change the existing jumper (RX0,TX1) and it won't impact the program downloading and serial's function.
- Microduino Shield BT4.0 uses the default serial RX0,TX1 to communicate with Core module, so can connect with Microduino FT232 directly.
Use PC to debug
- Use serial directly：
- No need superimpose the FT232 directly, cross connect the FT232 and Shield BT4.0's RX0,TX1.
Use FT232R、Core download and debug
- Use default jumper (RX0、TX1)：
- Unplug the Microduino Shield BT4.0 during download program;
- If you want to change the jumper cables to meet your requirement：cut the connection between two intermediate of the pad and RX0/TX1, and then connect them to D2, D3(or D9、D10).
- If changed the jumper, need the change the serial connection between Microduino Shield BT4.0 and Core module, change the connection "TX-RX0、RX-TX1" to following:
- TX-D2、RX-D3 (For Core+'s Serial1)
- TX-D9、RX-D10 (all SoftwareSeria libray to resolve)
Pin description
| HM-10 Pin |
Microduino Pin |
Function
|
| TX |
RX0（orD2/D9） |
serial send pin (TTL)，connect Core's RXD
|
| RX |
TX1（orD3/D10） |
serial receive pin (TTL)，connect Core's TXD
|
Application
Download progrm
Test program：文件:BLE debug uart1.zip,文件:BLE LightBlue time.zip
Shield BT4.0 pass-through data to IOS devices
- Prepared hardware：Microduino FT232R, Microduino Core, Microduino Shield BT4.0, supported Bluetooth 4.0 devices (iPhone4s upper,iPod touch 5 upper,iPad 3 upper,iPad mini upper)；
- Prepared software: Arduino IDE (1.0 release and upper), Microduino test program (Arduino part), download LightBlue from App Store；
- Start Arduino IED，open the Microduino test program, board type select "Microduino Core (Atmega328P@16M,5V)", download directly；
- Start to set the IOS device：
- start the bluetooth function on IOS device；
- Open LightBlue；
- In "Central" tab find the "HMSoft", then set "Service"-"Characteristics";
- Then you can see the debugging window, click the "Start Notify".
- ASCII data can be seen displayed: "BLE, Time: xxx" after connection success, where xxx is the Core and Shield BT4.0's running time in seconds.
Use Core 32u4 to debug Shield BT4.0
- Prepared hardware：Microduino FT232R,Microduino Core 32u4 and Microduino Shield BT4.0;
- Prepared software：Arduino IDE（1.0 releae and upper）, Microduino test program（Arduino part）;
- （32u4 can use USB to simulate the serial 0, but BT use 32u4's serial1 (RX0,TX1), so you can use the existing jumper(RX0,TX1)）;
- Start Arduino IED, open the Microduino test program, board type select "Microduino Core 32u4", download directly;
- Check if the serial communication works:
- Open the serial monitor, then send "AT" (No \r\n after AT), if return "OK", that means configure success.
Use Core+'s uart1 to debug Shield BT4.0
- Prepared hardware：Microduino FT232R, Microduino Core+, Microduino Shield BT4.0；
- Prepared software：Arduino IDE (1.0 release and upper), Microduino test program (Arduino part)；
- Other configuration：Suppose the player has changed the jumper which change the serial to D2、D3；
- Start Arduino IED, open Microduino test program, select the board type "Microduino Core (Atmega328P@16M,5V)", download directly；
- Check the serial communication：
- Open the serial monitor,send uppercase “AT”(no \r\n appened), if return “OK”，that means matched.
Note：If use the Android device to debug, in order to defect the BT module 4.3 release or upper is needed.
Microduino-Shield BT4.0 simple testing
Bug
History
- On June 5, 2013, the second time proofing is completed, changed its name to the "Microduino - (BT)" and added the third optional serial port - UART1, divided into 2 version, version 2.1, a module used for HM09;A 4.0 version, module used for HM10.
- On May 10, 2013, the board is completed.
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