[[File:secondary_serial_dropdownAuxindrop_nocan.jpg|center|200px|frame|With CAN_COMMANDS disabled]][[File:second_serial_dropdown_canonAuxindrop_withcan.jpg|center|200px|thumb|With CAN_COMMANDS enabled]]

* '''select option "Secondary Serial IO options''' - Again dependant on if CAN_COMMANDS have been enabled will vary what options you have to enable Interface" or "CanBus/Secondary serialSerial IO Interface" as appropriate.

=== Secondary IO Configuration Options === - Again dependant on if CAN_COMMANDS have been enabled will vary what options you have to enable Secondary serial. [[File:second_serial_option_nocanEnableSecondarySerial_nocan.jpg|center|400px|thumb|With CAN_COMMANDS disabled]][[File:second_serial_option_canEnableSecondarySerial_withcan.jpg|400px700px|center|thumb|With CAN_COMMANDS disabledenabled]]