This is very to do that.
You should use String.Substring Method (Int32, Int32) method.
You can use it like this
string Encoded = "001122A1BS0902323";
string COM=Encoded.Substring(0,4);
string PL=Encoded.Substring(4,3);
string Ele=Encoded.Substring(7,3);
string Lamp=Encoded.Substring(10,3);
string LPN=Encoded.Substring(13,4);