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The development guide that you actually need for the USR IOT module is this one:
You can find this linked along with other resources from the "Downloads" tab on the USR IOT BLE modules page:
The EZ-Serial firmware application that Bob mentioned is a relatively new offering from Cypress, and it functions in some similar ways and has additional features relative to the USR IOT offering. However, it is only available at this time on CYBLE modules, not bare PSoC 4 BLE and PRoC BLE chipsets. You can find details about this firmware platform here:
Just note that this is not the same firmware that you have. Your questions here relate to a platform that is created and supported outside of Cypress. For support with the USR IOT device and platform, I would recommend that you use their support resources:
Most of the frequenters of the Cypress community forums will not be familiar with the details of 3rd-party solutions like this, even though they are built around Cypress parts.