https://devzone.nordicsemi.com/f/nordic-q-a/18921/2-4-ghz-bandwidth-utilization-in-crowded-environmentsI&#39;m looking for information about bandwidth utilization in crowded environments, something like a sports stadium. Has anyone at Nordic collected data on potential congestion in these enviroments?en-USTelligent Community 13Thu, 12 Jan 2017 09:42:25 GMThttps://devzone.nordicsemi.com/thread/73119?ContentTypeID=1Thu, 12 Jan 2017 09:42:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8b7332de-4e5d-4cac-8088-c98e81d17ad7bjorn-spockeli<p>I am afraid that we do not have any statistics on the scenario that you describe, but generally speaking, the BLE protocol has been designed to co-exist with other 2.4GHz devices like WLAN.</p> <p>In an unconnected state, a BLE device will advertise on the BLE advertisement channels 37( 2402Mhz), 38 (2426MHz) and 39(2480MHz), that have been chosen in such a way that they fall in the gaps between the 3 most commonly used non-overlapping WLAN(802.11b) channels in the 2.4GHz, i.e. channel 1 ( 2412MHz), channel 6 (2437MHz) and channel 11(2462Mhz).</p> <p>Two BLE devices in a connected state will hop through the remaining 37 channels (37 data channels + 3 advertisement channels = 40 in total) in order to avoid congestion. However, if you have several thousand devices within range of each other( e.g. 20-25m) then you will run into congestion issues.</p> <p>Best regards</p> <p>Bjørn</p><div style="clear:both;"></div>