Better handling for leap second data storage especially over long periods of non-use. The unit may be in Garmin update mode. Or is it something to do with Arduino communicating with Linux I’m on Ubuntu by the way There’s probably more information I could provide but I really don’t know what would be useful. Power up the unit. Navigate your browser to the C: However, that can potentially leave you with a partially read string hanging in the queue.

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Proceed ovc step c. I had to switch to a linux machine, and after a number of pains to get Arduino UNO talking with Linux I was finally able to get back to where I was at in that picture.

Garmin GPS 18x LVC 5m

Click ‘OK’ to begin the software upload. Refer to Appendix B: That’s data from an airplane ride there was a loss of signal at takeoff which is why that part seems sudden AFTER I’ve parsed it and done some data-checking to make sure the altitude looks good. Fixed factory firmware flash capabilities. At this point, the Garmin software update program, updater.

Garmin GPS 18x giving funny output

There are still sentences that simply need extra attention in order to be able to get them to output correctly. Power up the unit.


If the connection confirmation window does not appear, there are two possibilities: Change to the directory in which you unzipped the files, i. If it is not, I further assume you skip the parsing.

Fixed automatic velocity filtering. If you unzipped the files to another directory, proceed as follows: If you unzipped the files to C: Improved binary phase output and mode switching reliability.

I suspect that there is a wiring problem, or the sketch has changed. PaulS Brattain Member Posts: Wayneft was correct in pointing out that in the second screenshot I was parsing the data as well as reading it, so I went back to just straight reading it.

Besides, Garmin binary is a polled mode; it doesn’t automatically spew data like NMEA – you must ask for it. A browser window will open and default to the folder C: Copies may be obtained from NMEA, www. Added map unlock support.

Gerhard Dangl’s astronomy equipment

The art of getting good answers lies in asking good questions. WebUpdater can be used with the USB versions of this product.

I didn’t think it would either, so I only tried half-heartedly As for wayneft’s suggestion to remove NSS, I can’t do that because, as kg4wsv said, my specific unit uses RS levels so I need an inverter.


If you unzipped the files to another directory follow option 2 below. I still get issues where I’m not getting funny characters, but sentences are cut short or are otherwise mangled such that I can get readings, just not gps18 readings.

Is it possible something happened to the GPS unit? Thankfully I can do that with one line of code instead of having to go out and buy more hardware.

Updates & Downloads

The GPS 18x is not properly connected to your computer. The unit may be in Garmin update mode. Verify the serial connections, cycle power on the unit, and try again. The update program will not find the GPS 18x and will fail.

Garmin GPS 18x giving funny output. The unit may already be in Garmin update mode.

Installation Instructions Download the appropriate self-extracting archive file onto your hard drive.