flyingw
December 14, 2017, 2:41am
1
Before creating a new thread please refer to the documentation for Navio2 and Navio+ .
I want to use an external GPS because the one included with the Navio2 does not work in the presence of a DragonLink 433MHz telemetry transceiver.
I am using the Navio2’s UART for the serial telemetry port. How would I connect a GPS?
Thanks,
Paul
TB_RTK
December 14, 2017, 7:40am
2
Do you mean interference messing up the gps signals?
mlebret
(Marc Lebret)
December 14, 2017, 7:44am
3
Hello,
You need an USB to serial converter with 5v out to power the GPS.
Option to pass to Ardupilot is -B /dev/ttyUSB0.
If there is an I2C compass on the GPS board, I2C lines (SDA, SCL) go to the I2C port of the Navio
RMK: Navio GPS should work with Dragonlink 433. Antenna placement is the key.
An antenna ground plane could help you: http://autoquad.org/wiki/wiki/configuring-autoquad-flightcontroller/gps-groundplane/
Marc
1 Like
flyingw
December 14, 2017, 1:17pm
4
TB_RTK and Mark,
Thanks for the tips. I will make a groundplane and try.
TB_RTK - yes the GPS cannot acquire satellites when the 433MHz transceiver is running.
Also, Mark can you please recommend a USB to serial converter? Like this one?
Or, maybe an FTDI serial adapter?
Thanks,
Paul
flyingw
December 14, 2017, 4:37pm
5
Humorous development:
I was able to get the GPS to work amid the RF by installing a rudimentary shield, but I don’t think it will work in practice.
I got 10 satellites and a 1.2 hdop - certainly flyable with the frying pan in place. At least now I think the cause is that the GPS antenna needs shielding from RF.
TB_RTK
December 14, 2017, 6:06pm
6
Funny enough, if you flip the pan around you would get much better gps signals. (less multipath)
flyingw
December 14, 2017, 6:21pm
7
This seems to be working well. Getting 10-12 sats, 1.0 hdop.
system
(system)
Closed
March 24, 2018, 2:41am
8
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