Serial Baud Rate or Bit Rate?

A common question raised to us is the confusion on the term Baud Rate and Bit Rate when calculating the capable load using our LoRA or ZigBee Terminals. In this post, we will attempt to explain the difference and how it relates to our products.

Bit Rate

A bit in engineering refers to a single binary value in the digital systems. This is represented in Electrical Engineering via voltage levels. For example, a +5V for Binary 1, and 0V for binary 0.  Bit Rate thus refers to the rate of bit (1s and 0s) transfer in a single second.

Baud Rate

The term baud refers to the number of Signals or Symbol. In an Serial application, most data sheet indicates the Baud Rate with the assumption of one Baud = 1 bit. As such, the specs stated are identical to Bit Rate.

However, if your serial payload is for an ASCII character which is typically 8 bits (UTF-8). That will reduce the Baud Rate accordingly. Take for example, a device configuration stated that the Baud Rate is 9600. This means that the device serial is able to communicate at 9600 bits per second. However, the Baud Rate will thus be 9600/8 = 1200 Baud or ASCII Characters per second.

Note that the higher the baud rate, the more sensitive it will be to the cabling quality and performance. L33Tech's solution comes with industrial grade 32 bits CPU that allows up to 115200 which is just about the maximum most micro-controllers can deliver.