You can use any communications program to talk to the M2 rotor but you are talking at command line level. The easiest way is to use the PstRotator program. It has a lot of features and is cheap. Look here: http://www.qsl.net/yo3dmu/index_Page346.htm<http://www.qsl.net/yo3dmu/index_Page346.htm> LeRoy KF7CQ