Hi @Ne0tuX,
I’d like to point out that we usually don’t recommend making any changes in the Reach software. Once you change anything, it’s becoming difficult to predict how Reach and ReachView will perform. In this case, we can’t see the whole picture on what’s going on with Reach device and we can’t predict how the things you’re running on Reach may affect its operation.
As an alternative, I can recommend outputting the NMEA data from Reach on any 3rd-party board which then can separate the data and provide you with the required messages only.