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CSR Harmony stack

Topics: Bluetooth - Other
Mar 29, 2014 at 4:04 PM
Any info on the CSR Harmony stack, is there experimental support or another SDK?

I accidentally bought a Sitecom CN-524 which uses the CSR stack which is a bummer, I can't find anything on the web.

There is a wiki which suggests there is an SDK, just not publicly available.
Mar 30, 2014 at 2:33 PM
I've never seen an SDK/API for that stack. It also appears to have disappeared from CSR's website. On an archived copy it says "CSR has announced that it will be discontinuing investment in the Harmony software product line." at

So I think you should just switch to the Microsoft stack. See e.g. Switching any dongle to the Microsoft stack
Supported Hardware and Software
Mar 30, 2014 at 5:37 PM
Edited Mar 30, 2014 at 5:37 PM
I tried that, but unfortunately it doesn't seem to work. When the CSR drivers are not installed it does ring the new hardware sound, but it just doesn't show up in the device manager. 'Add a device' also doesn't show any bluetooth devices.

It is a Sitecom CN-524 (BT 4.0). I guess I'll just sell it and get another one. Can you suggest a specific BT 4.0 dongle that will work?
Mar 30, 2014 at 5:43 PM
I also tried but it can't find a bluetooth adapter..
Mar 30, 2014 at 9:54 PM
Out of interest find how the dongle appears in Device Manager. On its properties dialog what is its Compatible Ids
(e.g. USB\Class_E0&SubClass_01&Prot_01
USB\Class_E0 )
and Hardware Ids
(e.g. USB\VID_0A12&PID_0001&REV_7558
USB\VID_0A12&PID_0001 )
Mar 30, 2014 at 10:12 PM



This is with its driver deinstalled which causes it to be listed as USB Composite Device
Apr 2, 2014 at 8:47 AM
I had a small twitter conversation with @CSR_plc and I asked about a freely useable SDK to which they replied that there isn't one, but that it is freely available after you buy it... Since then they removed the tweet.
Apr 10, 2014 at 8:27 AM
Ahh yes. It doesn't appear as a BTH device. I remember finding an article how to switch its mode to standard. But I guess you've bought a new dongle by now. :-.)