Arduino Library For Bluetooth A2dp Module Based On BK8000L Chip ...

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arduino library for BK8000L

This directory contain all files needed to support A2DP bluetooth module based on Beken BK8000L chip and also untested support for BK8002 based modules.

BK8000L (F-6188 module at least) have AT command control support, supported commands are described here

how to connect BK8000L

directly to computer

this is for testing if your module has serial interface enabled:

BK8000L computer(USB2serial for example)
RX TX
TX RX
GND GND
VBAT via diode to 5V

arduino using software serial (UNO, nano..)

Uncoment "#define USE_SW_SERIAL" in BK8000L.h to enable software serial support.

BK8000L computer(USB2serial for example)
RX 7 (1st parameter of SoftwareSerial in example)
TX 6 (2nd parameter of SoftwareSerial in example)
RESET 5 (defined as resetBTpin in example)
GND GND
VBAT via diode to 5V

arduino using harware serial (mega ..)

BK8000L computer(USB2serial for example)
RX TX1 (if using Serial1)
TX RX1 (if using Serial1)
RESET 5 (defined as resetBTpin in example)
GND GND
VBAT via diode to 5V
how to use it

Information about using libraries on arduino site

Copy content of this repository directory or just this two files: BK8000L.cpp, BK8000L.h to ~/Arduino/libraries/BK8000L/ directory (if did not exist, create one). Open new project in arduino and use this code, or check code in examples directory BK8000L.ino:

#include "BK8000L.h" #include <SoftwareSerial.h> //if using SW, with HW no need for this #define resetBTPin 5 SoftwareSerial swSerial(7, 6); //rxPin, txPin BK8000L BT(&swSerial, resetBTPin); //in case of HW serial use for example: (&Serial1) void(){ BT.begin(); //or BT.begin(9600); for specific baudrate } void loop(){ //should be call periodically, to get notifications from module, for example if someone calling... BT.getNextEventFromBT(); }

for more examples look ate examples/BK8000L/BK8000L.ino

supported functions begin(uint32_t baudrate); //parameter baudrate is communication speed between MCU and arduino, default 9600 sendData(String cmd); //construct string of AT+cmd and send it to serial port sendAPTData(String cmd); //construct string of APT+cmd and send it to serial port getNextEventFromBT(); //parse data send from module and set internal variales, call this periodicaly to parse data received from module ASAP PairingInit(); //initialize pairing mode PairingExit(); //exit pairing mode ConnectLastDevice(); //connect to last device Disconnect(); //disconnect from currently connected device callAnsware(); //answare currently receiving call, see CallerID variable to see who is calling callReject(); //reject currently receiving call, see CallerID variable to see who is calling callHangUp(); //hang up current call, see CallerID variable to see who you are calling with callRedial(); //call last dialed number, see CallerID variable to see who you dialing volumeUp(); //set volume up volumeDown(); //set volume down languageSwitch(); //did not understand what is this doing based on provided info in datasheet (sending AT+CM) channelSwitch(); //did not understand what is this doing based on provided info in datasheet (sending AT+CO) shutdownBT(); //shutdown BT module switchInput(); //switch to AUX input openPhoneVoice(); //did not understand what is this doing based on provided info in datasheet (sending AT+CV) memoryClear(); //did not understand what is this doing based on provided info in datasheet (sending AT+CZ) languageSetNumber(uint8_t number); //did not understand what is this doing based on provided info in datasheet (sending AT+CM+number) musicTogglePlayPause(); //toggle play/pause music on mobile phone musicStop(); //stop playing music musicNextTrack(); //switch to next track musicPreviousTrack(); //switch to previous track musicFastForward(); //fast forward current track musicRewind(); //rewind current track getName(); //get bluetooth module name getConnectionStatus(); //get BT connection status getPinCode(); //get pin getAddress(); //get HW address of module getSoftwareVersion(); //get SW version of module (this one did not work for me) MusicGetStatus(); //get playback status getHFPstatus(); //get BT connection status resetModule(); //reset module, for example to start it again Handling responce from module

As far as getNextEventFromBT() is called periodically, the library will update state variables based on the response from module. Function getNextEventFromBT() is called at the end of all functions mentioned above to handle response sent from the bluetooth module asap.

Library has its own variables, which are set/updated when data are received from module:

String BT_ADDR; // updated after getAddress() is called String BT_NAME; // updated after getName() is called String BT_PIN; // updated after getPinCode() is called String CallerID; // updated automatically or by calling getHFPstatus() uint8_t BTState; // enum, updated automatically or by calling getHFPstatus() or getConnectionStatus() uint8_t CallState; // enum, updated automatically or by calling callRedial() or getHFPstatus() uint8_t MusicState; // enum, updated automatically or by calling getMusicStatus() uint8_t PowerState; // enum, updated automaticaly or by calling getHFPstatus(),getMusicStatus() or getConnectionStatus()

If you init BK8000L library as in example code this variables can be accessed directly from main sketch with prefix BT, for example:

Serial.print(BT.BT_NAME);

BTState, CallState, MusicState and PowerState have these states, these are accessible from main sketch with prefix like other variable:

BT.Playing; // responce from module "MA" BT.Idle; // responce from module "MB" BT.IncomingCall; // responce from module "IR- or M2" BT.OutgoingCall; // responce from module "PR- or M3" BT.CallInProgress; // responce from module "M4" BT.Connected; // responce from module "M1" BT.Disconnected; // responce from module "M0" BT.On; // responce from module "ON" BT.Off; // set if shutdownBT() is called BT.Pairing; // set if PairingInit() is called

these can be used to triger actions in main sketch based on change of module state see BK8000L.ino in examples directory.

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