Hello,If you can "read" C#, source code for the BCD536HP Remote Head utility (which uses virtually the same protocol as SDS200) is linked in the attachments at: BCD536HPFirmwareUpdate < UnidenMan4 < TWiki
I can read C++ better than C#, but thanks.
I can not remember if I had a problem with RH-536. It would work serially, but would not connect via the wireless dongle. I need to try again.
73 Eric