Hi @DaveTSG,
Apologies for the radio silence here!
We haven’t tested the setup you mentioned, so I can hardly say anything but the integration. If Captivate works with the generic NMEA messages, then maybe it’s possible to integrate it into your device. However, I suggest contacting Leica about this, as they would know more.
I found similar threads: 1 | 2, and they suggested using Microsurvey’s FieldGenius for third-party application integration.