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Microduino-Shield BT 4.0 module is a plug-in device that supports Bluetooth 4.0 low energy standard.
Microduino-Shield BT 4.0 module is a bluetooth serial port transparent transmission module, using the 27 PIN standard Microduino interface, supporting the Arduino board and derivatives, such as Microduino core.
The module is designed by player ogre_c.
Features
- Microduino-Shield BT4.0 adopts U type 27 PIN interface of Microduino, combining with other Microduino modult to use;
- Microduino-Shield BT4.0 chooses the HM-10 BLE as the bluetooth core module;
- TI CC2540 chip with 256Kb space;
- Support AT instruction, capable of updating baud rate, device name,paring code and other related parameters as needed, flexible to use；
- Small, cheap, stackable;
- Open source hardware circuit design, compatible with the Arduino IDE development environment for programming;
- With uniformed Microduino interface standard and rich peripheral modules, it is flexible and convenient to have a quick connection and extension with other corresponding Microduino modules and sensors;
- 2.54 pitch row female connector for easy integration into breadboard.
Specifications
- Communication form: serial transmission;
- Power supply：+3.3VDC 50mA；
- Bluetooth protocol：Bluetooth Specification V4.0 BLE；
- Service support：Central & Peripheral UUID FFE0,FFE1；
- Frequency：2.4GHz ISM band；
- Modulation mode：GFSK(Gaussian Frequency Shift Keying)；
- Power of transmission：≤4dBm；
- Sensitivity：≤-84dBm at 0.1% BER；
- Transmission rate：
- Asynchronous: 6 kbps；
- Synchronous: 6 kbps；
- State indicator：
- Two states：
- Flashing means that the module has been powered but not matched well.
- Always lighting means that the module has been matched well and has started communication.
- By the indicator, it is very easy to the status of the module, which is conveniently.
Documents
Eagle PCB File:Microduino-BT Shield.zip
Main component
Development
Serial communication requirements
- Default serial configuration：
- Baud rate: 9600
- No check
- Data bits: 8
- Stop bit: 1
- As for Arduino IDE serial monitor：
- Set at："No line terminator"、"9600baud"
- For other serial debug software：
- Baud rate: 9600
- No check
- Data bits: 8
- Stop bit: 1
- We suggest using Microduino-Core32u4 to debug this BT module:
- Microduino-Core32u4 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 to change the existing jumper (RX0,TX1) and it won't impact program download or the serial port's function.
- Microduino Shield BT4.0 uses the default serial RX0,TX1 to communicate with Core module, so it can be directly connected with Microduino FT232.
Use PC to debug
- When debugging directly through the serial port：
- No need to stack the FT232 directly, and just cross connect the FT232 and BT4.0's RX0,TX1.
Use FT232R、Core to download and debug
- If it keeps using the default jumper (RX0、TX1)：
- Unplug the Microduino Shield BT4.0 during downloading the program;
- If you want to change the jumper cables to meet your requirement, you need to cut the connection between two intermediate of the pad and RX0/TX1, and then connect them to D2, D3(or D9、D10).
- If it needs to change the jumper, you can change the serial connection of Microduino Shield BT4.0 and Microduino Core from "TX-RX0、RX-TX1" to:
- TX-D2、RX-D3 (For Core+'s Serial1)
- TX-D9、RX-D10 (you can adopt SoftwareSeria libray to solve the problem)
Pin description
| HM-10 Pin |
Microduino Pin |
Function
|
| TX |
RX0（orD2/D9） |
It serves as the serial transmission pin (TTL)，capable of connecting the RXD of a microcontroller
|
| RX |
TX1（orD3/D10） |
It serves as the serial receiving pin (TTL)，capable of connecting the TXD of a microcontroller
|
Application
Download progrm
Program test：File:BLE debug uart1.zip,File: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 (version 1.0 or higher), Microduino test program (Arduino part) and LightBlue downloaded from App Store；
- Start Arduino IED，open the Microduino test program, select board "Microduino Core (Atmega328P@16M,5V)" and then download directly；
- Start to set the IOS device：
- start Bluetooth on IOS device；
- Open LightBlue；
- Find the "HMSoft" in "Central" tab , then set "Service"-"Characteristics" in order;
- You can see the debugging window and then click the "Start Notify".
- ASCII data can be seen to be displayed: "BLE, Time: xxx". Besides, xxx shows the runtime of Microduino-Core and Shield BT4.0's in seconds.
Use Core32u4 to debug Shield BT4.0
- Hardware needed：Microduino FT232R,Microduino Core 32u4 and Microduino Shield BT4.0;
- Software needed：Arduino IDE（version 1.0 or higher）, Microduino test program（Arduino part）;
- （You can keep the current jumper(RXO,TX1) without change for Microduino-CoreUSb utilizes USB simulation port 0(Serial) and the RXO and TX1 of Microduino-BT are the serial1 of Microduino-CoreUSB；
- Start Arduino IED, open Microduino test program, select Microduino-CoreUSB and then download;
- Check whether the serial communication is ok:
- Send the capitalized "AT"(NO \r\n after it) after opening the corresponding serial monitor. And if the return shows "OK", it means the setup is successful.
Use Core+'s uart1 to debug Shield BT4.0
- Hardware needed：Microduino FT232R, Microduino Core+ and Microduino Shield BT4.0；
- Software needed：Arduino IDE (version 1.0 or higher), Microduino test program (Arduino part)；
- Other condition：The player has changed the jumper, making the serial changed to D2、D3；
- Start Arduino IED, open Microduino test program, select the board type "Microduino Core (Atmega328P@16M,5V)" and then download directly；
- Check the serial communication：
- Open the serial monitor,send the capitalized “AT”( without \r\n behind), if the return shows“OK”，that means a successful configuration.
Note：If you use Android device to debug, you need to make sure the system should be version 4.3 or higher so that Microduino-BT can be detected.
A simple test of Microduino-Shield BT4.0
Buy
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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