You are right @@cooldoubtless, it is broken.   It looks like some recent ( or at least since the last time I looked .. which was years ) checkin into the source code has broken the TimerSerial code. The msp430g2231 and msp430g2452 use TimerSerial as Serial because they lack a uart. This requires that the pins used are the one from the timer_a. The TimerSerial code also needs to work with the 1.4 launchpad boards as they had no simple way to change the rx and tx assignments.   The change belo