Bluetooth Specifications

Bluetooth Specifications

Below, you'll find several stipulations for the well-known Bluetooth:

1. All through the United States and even Europe, the series of frequency is 2,400 - 2,483.5 MHZ, with 79 1-MHz RF (radio frequency) channels. The
Frequency range in Japan is 2,472 to 2,497 MHz with 23 1-MHz RF channels.

2. A data channel of Bluetooth arbitrarily hops 1,600 times per second between the 79 RF channels.

3. Each Bluetooth channel is divided into time slots, with each one being 625 microseconds long.

4. A Bluetooth piconet has one master and up to seven slaves. The master will broadcast in even time slots, while the slaves will transmit in odd time slot.

5. The data in a single small package can be up to 2,745 bits in length.

6. At present, there are two types of data transfer between devices - SCO (synchronous connection oriented) and ACL (asynchronous connectionless).

7. In a Bluetooth piconet, there can be up to three SCO links containing 64,000 bits per second with each one. To help avoid crash and timing evils, the links of the SCO will use reserved slots set up by the master.

8. A master can hold up to three SCO links with one, two, or even three slaves.

9. The slots not kept for the SCO relation’s can be used for ACL links.

10. A single master and slave can have one ACL link.

11. ACL is also master to one slave (point to point) or it broadcast to all of the slaves.

12. The ACL slaves will only broadcast when it has been request by the master. If the master doesn't make the request, the ACL slaves won't transmit no matter which at all.