uAvionix might have a solution to the July sUAS remote ID mandate but so far the FAA does not appear to be paying attention. I spoke with Ryan Reed at the uAvioniX booth at Sun N Fun in Lakeland (4/8/17).
(This interview may also appear in the UAV Digest podcast.)
uAvioniX recently released a White Paper on the topic.
Check the search and archive index for several previous blog posts on the subject of ADS-B and sUAS.
Related: sUAS news – uAvionix Release Remote Identification White Paper
Tim Trott – “The Drone Professor”