We are small trucking company Seattle ( US ) based . Looking for some help with on ELD/HOS solutions trailer tracking device . Help us to figure out hardware(selection of hardware) and software(with source code) . we need hardware for J1939 protocol for tractor or motor such as Cummins , Detroit, Peterbilt , [url removed, login to view] is over 100 solutions available in market ( $ 10 to $35 month) . for more information you can search on google "buy eld hos" or "eld device"