I'm working on a custom library for PSoC 4.
It simply uses some GPIO to create Software Serial communication interfaces.
I can see the components and load them in Topdesign when using Any PSoC4 with one exception: PSoC4 BLE can't see these components.
For PRoC Devices like CYBLE-022001-00 it is not possible to add the custom components to the PSoC Creator. For PSoC devices like PSoC4, PSoC4 BLE we can add the custom components.