RAK19003 + GPS RAK12500 Not Working - No "Slot B"

Support
1

I purchased a RAK19003 along with the RAK12500 GPS Module and I’m unable to get the GPS to work.

What confuses me, is the Meshtastic Docs say,
image

Despite what appears to be a typo on the docs page, I tried both slot D and slot C without any luck.

Any Ideas?

2

Any luck on your end? I am having the same problem. Slot C is designed for it and Meshtastic says Slot C is supported for the GPS module. I am not getting it to register. I’ve tried two GPS modules.

3

i am having several rak19003 models,
one running a gps 1210, and an other one running a gps 12500
both are in the same slot, and functional. firmware 2.2.23 atm
before it was 2.2.10
if i remember correcty, there was only one slot, where the modules (and screws) did fit in. that one i used,

after the last update, the modules needed quite some time to start functioning, i think there was a gps reset involved in the last update. i thought its no more working, but then i just let it outside for several hours and suddenly it worked…

4

You need to use slot A for the gps

5

Do you mean GPS (RAK12500) just working on slot A for RAK19001 and RAK19007 only?

6

@bseal84 Did you end up figuring this out? I am having a similar problem.

I just did a continuity test between J7.1 on the RAK19003 and the RAK4630 pins and found that it was connected to Pin 9 (P0.19) which is UART1. This corresponding through-hole interface on the the RAK19007 (J10) is connected to UART2 just like slot A on that board.

This was confirmed here.

Unfortunately, when I tried setting the GPS pins to 19 and 20 for UART1 I still couldn’t get things working.

7

If you have Version E of the 19003 base board then you may have the same issue I did.

8

I’m having the same issue.
RAK19007
RAK12500

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9

Same I’m Using RAK19007 + RAK12500.

Tried For Weeks Using The Default RAK12500 Included Antenna.

After Much Trial And Error And Getting No Success Still Constant No GPS Lock And No Sats. I Bit The Bullet And Ordered A Cheap Replacement GPS Antenna.

Swapped Out The Default RAK One And Turned On My Node. Within 20 Seconds The Cheap Antenna Picked Up 4 Sats Whilst Indoors And Then More Once Stepped Outside.

Here Is The GPS Antenna I’m Now Using:

RAK12500 Replacement GPS Antenna

MAKE SURE YOU GET THE 15X15 Size.

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