There is a Digikeijs group on groups.io ( it now also includes YaMoRC -- a new company started by the original programmer for Digikeijs).
Note that the DR5088RC has a rated sensitivity of 10 to 15 mA. That's quite a bit higher than many other occupancy detectors (BDL168 is rated at about 1.2 mA). It detects engines fine, but it doesn't do well if you use larger resistors on cars. I actually use the DR5088RC as a RailCom reader and add RR-CirKits WatchMan or BOD-8's for the dectection on the same blocks. You can set the Sensor address and the Reporter address for each of the 16 blocks, plus one each for the common block. The documentation and Windows application can be found at?
Scott Walton
