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Audio wBluetooth Technology

Former Member

Hello  Everyone,

 

I am new with microcontroller and embedded system itself. I am currently working on the audio speakers, which is an old device that has dsPIC mcu, CODEC, and 8Mbit flash memory to record and play from the microphone input.

 

My intent is to add a bluetooth for wireless connectivity and hopelly able to control with the smart phones or remote control and add PLAY, REC, FF, and RWD. The bluetooth that I have seen so far are RN52, WT32(Bluegiga) and BTM511(Laird Tech) all with CODEC capability from mouser.

 

 

1.) Do you have any suggestion which Bluetooth I should use and do you recommend getting a development kit that goes with it?

2.) How much memory do I need to store at least 1hr of recording?

3.) Also, to increase memory and save money, should I use EEPROM instead of flash memory?

4.)  I really want to use AVR MCU instead of PIC, but I'm still debating if i should switch or not, should I do it or not?

 

Thank you,

JB

  • 0

    Hello John,

    We hope you are enjoying the Community, I am actually going to move this to the Embedded Area if the Community as I think it is a better fit.

     

     

     

    Thank you,

     

     

    Jamie

  • 0

    Hi Jon,

     

    1.-For BT connections (SPP) I have used lairdtech and microchip (roving network) modules, in my opnion lairdtech ones are more complete (but no configurable over the air while rn can be configured over the air), but if you have the chance of XV version (Xbee shape) choose it, because both are easy to configure, but normally 0.1' pitch makes them much easier to handle with.

     

    2 and 3.-About storing capabilities, take into account that A2DP does not allow all codec, you have to check which codec are supported by the devices, only SBC codec is mandatory for A2DP, so depending on how compressed can be the audio, you will need more or less memory. But I think that storing is the less woring issue for your project, you can easily use an SD card and read/write over SPI.

     

    4.- If you don't care about the money and want to get your goal faster:

    http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en566018

     

    Hope it helps!!

     

    By the way, very interesting project, please let me know what you get!!

     

    Regards,

    Miguel