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Background scanning for devices with already an open channel


Total Posts: 42

Joined 2020-01-26



can anyone confirm, that I can't scan for devices using background scanning, for which I already opened a channel?

If I scan for devices using background scanning, I find the devices "25171" and "49025". Later I can open a channel to these devices and receive data.

If I open a channel to "25171" first and after a couple of seconds try to scan using background scanning, I only find the device "49025".

Is this correct?

Best regards      

Total Posts: 314

Joined 2012-06-27


If you look at figure 7-2 in the channel search application note you can see a similar behavior to what you are likely encountering. The radio can only serve one channel at any given time, so if it has a master channel open or a slave channel that has synchronized with a master, then the background scan does not pickup any messages that occur at the same time.      


Ian Haigh