After wondering/researching about this for days, I finally ask this question: What is the speed (bits per second) of a bluetooth SPP RN-42 device? Is 1 baud = 1 bit (thus 9600 baud = 9600 bits per second) or 1 baud = 1 packet (9600 baud = approx. 9600 * 8 bits = 96000 bits per second)?

The data sheet says: "Sustained SPP data rates: 240 Kbps (Slave mode), 300 Kbps (Master mode)" but do they mean BAUD per second or BIT/BYTE per second?

Any help would be appreciated!

  • 2
    \$\begingroup\$ In general, the lower case b is bits while the upper case B is bytes. So "240 Kbps" is 240,000 bits per second. BAUD represents the number of symbols per second which depends on how the signal is modulated. However, for a simple serial signal, it generally corresponds directly to bits per second. \$\endgroup\$
    – DoxyLover
    Jun 21, 2015 at 16:29
  • \$\begingroup\$ This may help you: electronics.stackexchange.com/questions/56265/… \$\endgroup\$
    – The Photon
    Jun 21, 2015 at 16:52

1 Answer 1


Strictly speaking 1 Baud means one symbol per second. A symbol may represent more than one bit.

Most people however use Baud rate and bits per second (bps) interchangeably.

  • \$\begingroup\$ I was aware that 1 baud represents 1 symbol/sec. However I wasn't sure if the RN42 data sheet meant baud = symbol or just baud = bit. But now I guess they meant bit per second... \$\endgroup\$ Jun 21, 2015 at 20:52

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