To remotely control your camera with DSLR Remote via a Bluetooth connectionbesides your smartphone/tablet and DSLR Remote, all you need is:

No modification is needed on the headset  whatsoever, it can be used as it is. Instructions on how to operate your camera via such a bluetooth connection you will find here.

Example: LogiLink Bluetooth Stereo Headset V2.0 and a short cable with opto-couplers (LTV 352T)