Piet Barber wrote:
So... has anybody successfully gotten the LX-Nano to be the GPS source
for the SN-10? I've made my own RJ-45 cables to connect the two, but the
SN-10 refuses to acknowledge that there's a GPS attached. My volkslogger
blew up last spring, and we've not been able to make any use of the
SN-10, outside of the speed to fly function which still works.

I feel like kind of a pioneer here, except a lot less smart.

I wired the Nano to the SN-10 with the wiring instructions on page 12 of
the Nano handbook. Set the baud rate on both ends to 19200 (also tried
4800), NMEA. No soup.

Anybody got any ideas?

I have some bad feeling that it could be because of these reasons that I
haven't yet successfully eliminated as possibilities, (ranked by most
likely to least likely):

1) I'm not actually wiring it up in the way that I think I'm wiring it up
2) there's something subtle and different in the NMEA sentence structure
between the Nano and the SN-10 that won't be fixed by wiring.
3) the SN-10 is busted somehow.
4) The USB-to-serial cable that comes with the Nano is busted somehow.


If there is anybody out there who has successfully paired these two
devices before, I'd really like to know -- that way I can eliminate possibility #2 above.

Page 12 of the manual is not wiring instructions it's just pinouts of the
nano power/converter cable. So how exactly have you wired these together?
You should be connecting the nano RS-232 level transmit to the SN-10
receive and the nano RS-232 level receive to the SN-10 transmit and
connecting the nano ground to the SN-10. Leave everything else
disconnected. Is that the cable you built? It is not uncommon to mis-crimp
telco/modular connectors where the pins might be pushed down but not make
proper contact with the wire, especially for new users or cheaper crimp
tools. Can you see the pin/blade going through the wire. Use a multimeter
to continuity check between the pins on each modular connector.

You have disabled Bluetooth on the nano, right?

Do you have a computer with a serial port or a USB to serial adapter you
know works? Of so you can wire up a cable between that and the Nano
converter cable, and use a terminal emulator on the computer to see if the
nano is working properly.

Darryl