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  1. #1
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    HC05 UART Communication Data Rate

    Hi every one,
    I want to use HC05 bluetooth module with my FPGA board and transfer and receive data with my PC application.
    Data rate of Board-to-PC is about 25K Byte per second and data rate of PC-to-Board is about 1 K Byte per second.
    So, Can I actually access this range with HC05?

    I'm confused with datasheet:

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    Is 3Mbit per second accessable with 460800 Baud rate?

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  2. #2
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    Re: HC05 UART Communication Data Rate

    Hi,

    1 bit/s is equal to 1 Baud
    3MBit/s --> 3MBaud
    460800Bit/s --> 460800 Baud

    Klaus
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  3. #3
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    Re: HC05 UART Communication Data Rate

    460800 Bd means 460800 Bit/s, respectively 46 kByte/s with N-8-1 frame.

    You want to interface HC05 with PC Bluetooth transmitter?



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  4. #4
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    Re: HC05 UART Communication Data Rate

    Quote Originally Posted by FvM View Post
    460800 Bd means 460800 Bit/s, respectively 46 kByte/s with N-8-1 frame.

    You want to interface HC05 with PC Bluetooth transmitter?
    Yes, I want to nterface HC05 with PC Bluetooth transmitte.
    And about Transfer rate, if 46 kByte/s is Maximum transfer rate, so what means 3Mbps rate in datasheet?



  5. #5
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    Re: HC05 UART Communication Data Rate

    Hi,

    Maybe 3Mbit/s is the bluetooth data rate, while the 46kbits is the UART style payload.

    Post a link to the complete datasheet, so we can verify this.

    Klaus
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    Re: HC05 UART Communication Data Rate




  7. #7
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    Re: HC05 UART Communication Data Rate

    Why there is No standard datasheet for HC05?
    I find a new page that says max. baud rate of module is 1382400 bps.
    which one is right?



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  8. #8
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    Re: HC05 UART Communication Data Rate

    There are many HC-05 data sheets around, official datasheet is available from Chinese manufacturer wavesen along with an AT command manual. According to the latter, HC-05 also supports 922k and 1382k Baud rates, but I never tried.

    HC-05 is essentially a CSR/Qualcomm BC417xx Bluetooth Asic with a respective program in flash. Versions with different functionality may be made.

    BC417xx is an old Bluetooth chip. Some "HC-05" on the market are even using older chips like BC352xx which has much lower speed than recent HC-05.



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