+Rationale behind the chosen configuration
+------------------------------------------
+
+``AT E1``
+ Echo on
+
+ We need this to be able to get a prompt reliably.
+
+``AT S1``
+ Spaces on
+
+ We need this to distinguish 11/29 bit CAN addresses received.
+
+ Note:
+ We can usually do this using the line length (odd/even),
+ but this fails if the line is not transmitted fully to
+ the host (BUFFER FULL).
+
+``AT D1``
+ DLC on
+
+ We need this to tell the "length" of RTR frames.
+
+
+