> I am looking into GPS modules for my scope clock. There appear to be a few > out there.
Yes, I've played with several of them. > > The Maestro A2235-H is sold by Mouser for $14. Speaks NMEA. > > The MKT3339 is sold by Adafruit for $30. Also speaks NMEA. They have some > software for Arduinos. > > Has any of you used either of these modules, and if so, what was your > experience? I tried the MTK3339, and had repeated problems with it going into a strange mode where it would switch to sending vendor-unique PMTK sentences instead of the standard NMEA ones, and would refuse to respond to commands. Searching the internet for clues revealed that other people had similar problems, and several fairly superstitious sounding "fixes", none of which worked reliably for me. Since NMEA is NMEA, most software for one of them will work for others. I ended up rolling my own in the end. NMEA isn't hard to parse, but converting coördinates from direction and degrees/decimal minutes to signed decimal degrees requires either floating point, or some creative juggling with integers. My code is part of a project I'm not free to share, but I could strip out the GPS portion if you're interested. I also looked at the available task schedulers available for Arduino and ended up rolling my own for that, too. - John -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/FDD8DC5A-E85A-4088-8D0C-0455F2EDAC31%40mac.com. For more options, visit https://groups.google.com/d/optout.
