piACC

piACC is a 4 channel relay controller* using a Raspberry Pi zero control unit. The piACC mobile app allows you to control any and all of the four relays using bluetooth with the touch of a button. Initially designed for an overhead light bar, future releases will allow editable buttons for customizing accessory descriptions for things like running lamps, fog lights, etc. Custom key token prevents others from toggling your relays.
Details and videos on building the unit can be found on https://247coding.com/drupal/?q=piacc.
* Requires Raspberry Pi controller unit with 4 channel relay HAT add on.