About MSP430fet

MSP430fet is a project begun by Travis Goodspeed as an open source implementation of the MSP430fet protocol, capable of reading and writing memory of an MSP430 microcontroller without relying upon proprietary libraries. It is an independent recreation of prior work by Robert Spanton and Tom Bennellick. It is intended for programming chips, but not as a complete replacement for msp430-gdbproxy.

Those interested in the FET protocol should read this article on the subject, which should give you a good start on reversing the protocol and replacing this ugly hack of a client with proper code.