The speed of a baud rate? – RN42

In my experience, radio modules usually have 2 different baud rates:

• UART baud rate is the baud rate for communicating to microcontroller on the board. Usually, it's adjustable.
• Over-the-air baud rate is the baud rate for communicating via Bluetooth. It's usually fixed.

I've searched through the user manual and datasheet for RN-41, which is the Bluetooth module inside the dongle. I didn't find any indication that over-the-air baud rate is adjustable in this module.

So, I doubt that you will get more range if you configure the baud rate down to 1200.

Baud rate is the number of symbols per second.

You have 36 bits, each bit is made up of 3 symbols (011 or 001), so there are 108 symbols.

One packet takes 44.7ms, so the symbol rate is \$\frac{108}{0.0447}\$ = 2416.1 symbols per second.

As each bit is 3 symbols you also know that it equates to \$\frac{2416.1}{3}\$ = 805.4 bits per second. You can confirm that as \$\frac{36}{0.0447} = 805.4\$ bits per second.