If you are working with a Skaarhoj Controller that used the unisketch platform and does not have an internal BluePill there are a few extra steps needed to configure your panel correctly so that it can be used in conjunction with an external BluePill Device.
1) Configure your Unisketch Panel to use the BluePill Raw Panel Core. Instructions on how to do this can be found on the linked support page: https://wiki.skaarhoj.com/books/blue-pill-reactor/page/connecting-unisketch-controllers
2) Add your newly configured Panel to the BluePill Reactor interface. Instructions on how to do this can be found on the linked support page: https://wiki.skaarhoj.com/books/blue-pill-reactor/page/adding-panels
Once you have added your Panel to Reactor on your external BluePill the remaining steps should be the same as configuring with an internal BluePill see Skaarhoj Panel with BluePill Setup with ST4 and ST4.3 Article for reference