What are Different Classes in Bluetooth
Bluetooth is a radio standard and communications protocol primarily designed for low power consumption, with a short range (power class dependent: 1 meter, 10 meters, 100 meters) based around low-cost tranceiver microchip in each device.
Bluetooth lets these devices communicate with each other when they are in range. The devices use a radio communications system, so they do not have to be in line of sight of each other, and can even be in other rooms, so long as the received power is high enough. As a result of different antenna designs, transmission path attenuations, and other variables, observed ranges are variable; however, transmission power levels must fall into one of three classes:
| Class | Maximum Permitted Power (mW) |
Maximum Permitted Power (dBm) |
Range (approximate) |
|---|---|---|---|
| Class 1 | 100 mW | 20 dBm | ~100 meters |
| Class 2 | 2.5 mW | 4 dBm | ~10 meters |
| Class 3 | 1 mW | 0 dBm | ~1 meter |
Explore posts in the same categories: BlueTooth Interview Questions