Difference between revisions of "Microduino-【BT】"

Microduino-Shield BT4.0

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 File:Microduino-BT Shield.zip

Main component

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

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

• Use the RX0, TX1 as the default communication pin between Microduino Shield BT4.0 and Core module, so can't directly superimposed with Microduino FT232R.

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

• Support AT command to configure and control：File:Bluetooth40 cn.pdf，File:Bluetooth40 en.pdf

Application

Download progrm

Test program：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 (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+'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.

Microduino-Shield BT4.0 simple testing

• Microduino-Shield BT4.0 simple testing from @颜火山

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.

Pictures

Microduino BT 4.0 Front

Microduino BT 4.0 Back

Video