Difference between revisions of "Microduino-【BT】"

Microduino-【BT】

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 Upin27 interface of Microduino, combining with other Microduino modules to use;
• Microduino-Shield BT4.0 chooses the HM-10 BLE as the Bluetooth core module;
• TI CC2540 chip with 256Kb space and low power consumption;
• 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 uniform 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;
• 2.54mm pin pitch 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

• • HM-10 Bluetooth module documentation：File:Bluetooth40 cn.pdf，File:Bluetooth40 en.pdf
  • cc2540_datasheet：File:Cc2540 datasheet.pdf

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

Microduino-BT

Microduino-BT

• Support AT intruction configuration and control：File:Bluetooth40 cn.pdf，File:Bluetooth40 en.pdf

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. If you get a response "ERROR" then select "Both NL & CR" from the dropdown next to the baud rate in the serial monitor.

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.

How to Connect Two Microduino-BT Modules

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

• A simple test of Microduino-Shield BT4.0 from @颜火山

FQA

• This module can’t make pair with win7?
  • Check the BT version in win7, this module only support BLE 4.0 version and default password is 000000.
• Does this module can reset by button?
  • No, it can be reset by power down.
• This module can’t make pair with iphone and Android phone?
  • This issue mostly is caused by the BT version. This module only supports BT4.0 protocol.
  • For Andriod OS: 4.3 release
  • For IOS: iPhone4s upper, iPod touch 5 upper, iPad 3 upper and iPad mini upper

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.

Pictures

Microduino BT 4.0 Front

Microduino BT 4.0 Back

Video