It’s not intuitive, so I’m writing this down for posterity.

  1. Install energia from the AUR. (There is a straight C toolchain for the MSP430 on the AUR too – search for ‘MSP430’!)
  2. Install the udev rule provided on the Energia website by putting it in etc/udev/rules.d/.
  3. Reconnect your board.
  4. List /dev/tty*. Your board will be named something like /dev/ttyACM0 or /dev/ttyUSB0.

The last step applies to most USB serial devices. It’s the Linux equivalent to checking the COM ports in Windows. :)

References: