Ok, the primary GPS (Garmin GPS126) in the cockpit is elderly and a bit worse for wear, but the only complaint is punching in an endless list of waypoints and manually combining for routes...
On the last boat, had another vintage Garmin receiver which included a bit of software to connect to a windows pc and upload/download info via the GRMN/GRMN interface. Alas, something so simple seems to be no longer out there...
Been trying to set this up in Nx for several months off an on, with no luck. Of course, I had to do a bit of repair on the GPS itself (busted plug in the back) and could of botched up the repairs. Only 3 data wires, but it's possible.
Here is the setup and conditions...
GPS 126 Connected to laptop via Belkin FTDI usb/serial cable. Data lines connected to db9 input Pin 5 - Ground, Pin 3 - GPS data in, Pin 2 - GPS data out.
GPS set to NMEA/NMEA NMEA 0183 v2.0 4800 Baud
OpenCpn GPS Panel etc reads data fine, and NMEA debug window shows stream of NMEA sentences
Any attempt to upload waypoints or routes to GPS results in open CPN sending a data stream and reporting upload complete, but nothing showing in GPS...
Attempts to connect to GPS when GPS is in GRMN/GRMN HOST mode fail. No data stream showing. Have tried checking and unchecking the "Use garmin protocol" boxes in opencpn with no resuts either direction
Not married to using opencpn to transfer files, as it is simple to export as gpx file and load another way. Question is what other way? Have tried using EasyGPS via wine, with no joy and poking about for other options. Any suggestions appreciated.
There was a long thread on opencpn forum about routes/waypoints and the 126,
here but it ended up being a windows related issue.