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Happy new year everyone, happy flying.  :beer2: :beer2:
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21 Dec 2019 16:13:44
Tbh I've been really busy, not had much time to fly anything and with conditions being crap, hopefully in the new year I'll have some new projects on the go, mostly to do with HAM radio, will certainly fly again soon. FTR I hate FB too   :D Merry Christmas
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Printing 3d Forum

Crius / NEO 6 GPS V2

Started by Jumpy07, Saturday,October 27, 2012, 20:13:04

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Jumpy07

Received my new V2 Neo 6 / Crius GPS today, thought would update you on the differences with the V1 and advantages etc


  • First of all the NEO 6 V1 is a very basic GPS with no external EEPROM and relies on battery backup to save settings, the battery on average will only retain these settings for @ 48hours, after which time the GPS will most likely do a cold start. With many Flight Controllers.. such as the Rabbit this gets around some of problem by configuring the GPS on boot and changing the baud rate etc.. but will still cold start after a few days without power.





  • The difference between the two is that the Neo 6 V2 has a bigger antennas  25x25mm and an external EEPROM which will hold settings on power loss, it also has a battery for warm starts like the V1, but again its quite small. Performance wise the V1 and V2 are exactly the same. The major advantage of the V2 is the external EEPROM which can be used to upload custom settings such ast the 3DR-Ublox.txt file specifically for the APM.




You can';t reprogram firmware in the cheaper NEO units...you can however use U-center to change the GPS Configuration... and save it to EEPROM.  For the APM you can use a file to do this for you.....select File > GPS, tick the nonvolatile memory option, select 3DR-Ublox.txt and upload to your unit.

After the GPS restarts in the new config you have uploaded, you will see in U-Center that bar-graphs don';t show anything,  however your will still see info in the stats .. ie:  lat/long, number of sats, hdop and pdop. Also your config will now ber serial baud: 38400, Refresh: 250 ms / 4 Hz and the output will be  UBX-only.

3DR-Ublox.txt can be found here: http://ardupilot-mega.googlecode.com/git-history/ArduPlane-2.50/libraries/AP_GPS/config/3DR-Ublox.txt
U-Centre can be found here: http://www.u-blox.com/images/Support/Support_Products/EvaluationSoftware/u-centersetup-7.0.2.1.zip

Its also worth point out that if you use the GPS with the Rabbit FC then the TX and RX are the wrong way round on the cable provided, takes 2mins to swap them round. (Yellow and Green wires)

To use U-Centre you will also need suitable FDTI adapter (5v) and some back to back pins for the cable etc.. connections need are 5V, Ground, TX & RX.

Heres some stats from the V2 .. GPS was on my window ledge so not ideal.. @100 samples.. overall roughly the same accruacy as the V1


BNUC-S Pilot with PfCo /PFAW.
UAQ / CAA PfCo Instructor / Flight Assessor

"All that is necessary for the triumph of evil is that good men do nothing"

neagron

Thank you for that,good info.Marty.  :scotland: :scotland:

Gaza07

Excellent post Jumpy I have the v2 but don';t seem to be able to write to the eeprom I have used the ucentre and ticked the various types of eeprom to write to and its completed but when I leave the gps unplugged for some time it still reverts back to the default speeds  :shrug:
Have you tested your eeprom to see if it actually is storing the info ?

Jumpy07

To be honest Gaza I didnt check how long it held the settings.. will check .. but if saved to EEPROM shouldnt be a problem..

I didnt save the 3DR settings to EEPROM on mine as using the GPS with my Rabbit.

Will try mine and let you know..

Best Regards

Craig
BNUC-S Pilot with PfCo /PFAW.
UAQ / CAA PfCo Instructor / Flight Assessor

"All that is necessary for the triumph of evil is that good men do nothing"