Chiplotle has a dedicated folder, $HOME/.chiplotle, which houses the config configuration file. This file is for setting various preferences and defaults. At present a default serial port and a preferred plotter type are supported.
To set your default serial port, set the serial_port= line in the config file.
Note
In POSIX type operating systems these ports are under the /dev directory. Serial ports usually look like ttyS0, ttyS1, etc. If you have a computer with no serial port and you are using a serial to USB converter then these ports might look like ttyUSB0, ttyUSB1, etc.
To set your default plotter, set the plotter_type= to a valid plotter type.
If these variables are not set, Chiplotle will interactively ask you what port and plotter to use when run it in command line mode via the chiplotle terminal script.