Sending NMEA 0183 GPS data using Arduino....

[RayS]

I've started another project: Using an Avidyne EXP5000 MFD with X-Plane.

I was successful in programming a Teensy to talk to a Garmin MX20 Moving Map unit using position data from X-Plane.

Now I have an Avidyne EXP5000 MFD that I want to talk to using X-Plane Position data.

It recognizes the following formats:

1. King/Aviation
2. NorthStar
3. NMEA 0183

I prefer the NMEA format as it seems to be more popular. Has anyone tinkered with NMEA 0183 GPS data using Arduino/Teensy?

I'd love to hear from you!

[ame]

I did some stuff with an 8051. Decoding NMEA is pretty easy. Producing an NMEA string with provided data should be pretty easy too. Just stick a bunch of strings together and tack on a checksum.

I'd prototype it in Python on a PC for testing/fiddling, then rewrite for Arduino when you know it's going to work.

[ame]

Here's an example of generating the checksum.

http://engineeringnotes.blogspot.com/2015/02/generate-crc-for-nmea-strings-arduino.html?m=1

[RayS]

That's exactly what I was looking for. Thanks!

On my Garmin controller I am also generating a checksum because the Garmin protocol also requires it (I guess it's just good practice) so most of the bits are there, just need to rewire things a bit.