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Mastering Arduino by Jon Hoffman

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Bluetooth radio

The range of a Bluetooth radio is dependent on the class. The following chart shows the range of a Bluetooth radio by the class:

Class

Power (mW)

Power (dBm)

Range in meters

1

100

20

~100

2

2.5

4

~10

3

1

0

~1

 

As with any radio technology the area surrounding the radio has a substantial effect on the range of the radio. The range listed in the previous chart is the theoretical maximum range with ideal conditions. The typical range is usually less than this theoretical maximum range.

Where the Bluetooth LE radio operates from 2,402 MHz to 2,480 MHz with each channel being 2 MHz apart, the Bluetooth Classic radio uses 79 channels from 2,402 MHz to 2,480 MHz with each channel being ...

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