How many bluetooth channels

Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. How many Bluetooth modules can work in one room?

Ask Question. Asked 1 year, 8 months ago. Active 1 year, 8 months ago. Viewed times. Sci Sci 17 5 5 bronze badges. So max at any tme slot would be 79, but others will wait for free slot. That would be quite amazing. Can someone confirm this? Add a comment. Active Oldest Votes. Bimpelrekkie Bimpelrekkie Had no idea.

The BLE device I worked on lets me choose one, two or all of three channels 37, 38, 39 which the device is going to use for advertising.

And I'm sure there are other manufacturers which even let you exclude some channels for the connected-state. This means that, in real life, piconets are likely to coexist far better than our calculations suggest. Still even though it is an approximate result, our calculations show that Bluetooth wireless technology fulfills its goal of robustly tolerating interference so that a large number of Bluetooth devices can interoperate in a small space.

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The most recent specification is Bluetooth Core Specification version 4. Bluetooth is based on frequency-hopping spread spectrum radio technology, making use of a packet-based structure in a master-slave arrangement.

That is, information is transmitted in discrete chunks known as packets, and in each piconet, there exists a master device that dictates which of the other slave devices it is communicating with. Devices can also switch roles from master to slave and vice versa, and they belong to multiple piconets, where they are master in one network and slave in another.

These two connected piconets are then referred to as a "scatternet". Information is passed between the master of a piconet and one of its slaves at any given time. Bluetooth uses a low-powered signal; there are three classes of radios used in Bluetooth devices, with the shortest range being Class 3 radios whose maximum power output is 1mW, producing a range of up to about one meter and the longest-range being Class 1 radios with a maximum output power of mW and a range of meters.

Bluetooth utilizes frequency-hopping spread spectrum technology to avoid interference problems. The ISM 2. It is these frequency channels that Bluetooth technology is "hopping" over. The signal switches carrier channels rapidly, at a rate of hops per second, over a determined pattern of channels. There are six defined types of hopping sequences.