I’m not sure if we’ve used an external GPS with a ublox. Our SM200 uses this chipset, but we don’t interface it over serial as Spike does.
It is probably better in the short term to consider using a different GPS if possible. If you would like to email me at aj at signalhound dot com, I can keep your email and let you know if we are able to acquire the GPS you are using and get it working in Spike. Also, it might be interesting for us to add some debugging utilities to the GPS interface in a future release of Spike, and I can reach out if we ever add something like that.
I apologize for the inconvenience. Thanks for your patience and providing the information.
Andrew
