Just wanted to check your requirement,
A. Do you just want to send text from your phone or PC (from the CySmart app/tool) and receive it in PSoC?
B. Or do you want a Serial over BLE sort of interface, which you can receive/send through a terminal?
If you need option A, then you can do that simply by creating a custom service (see the post here). Once you have your custom service defined and included in your project. You can simply connect to the device from the CySmart App (mobile) and go to the GattDB tile. The custom services are listed as "Unknown services" in the GattDB page. You can identify your service/char using the UUID assigned by you. You can then send Hex or ASCII value to and read hex/ascii values from that particular service from the app.
If you need option B, then I can help you with a simple example (custom Serial-over BLE service that works with our CY5677 dongle). We will be releasing the proper example later but I can help with a version that I use for my testing - might be a bit messy
Let me know your inputs.
Meenakshi Sundaram R