Is the Slave latency, Connection interval, Supervision timeout, Transmit window size, number of advertising channels configurable?
Rigado BMDware does not provide user access to the parameters you mentioned.
You can, however, develop firmware for the nRF52 on the module with any of the tools from Nordic. We also provide tools to couple our RigDFU and S132 with your firmware so you can enable OTA updates with end-to-end encryption.
With your own firmware, Slave Latency, Connection Interval, and Supervisory Timeout can be integrated. Keep in mind that these are negotiated parameters. While the peripheral can request them, it's ultimately the central that accepts or rejects them. Steps and sizes are noted in the attached app note, plus the Bluetooth Core Specification. The Nordic SDK is also another resource for the various APIs to configure these parameters.
Note: BMDware and RigDFU source code is being released. For full details, please see this article.