# GPS/GNSS **URL:** https://community.sparkfun.com/c/global-positioning-system-gps/96.md?page=2 [Latest](https://community.sparkfun.com/latest.md) · [Categories](https://community.sparkfun.com/categories.md) · [Tags](https://community.sparkfun.com/tags.md) **Page:** 3 --- ## [GNSS RTK Facet not charging](https://community.sparkfun.com/t/gnss-rtk-facet-not-charging/69109)
**Author:** [@Gandalf](https://community.sparkfun.com/u/Gandalf)\ **Replies:** 1\ **Last updated:** [June 23, 2026, 10:05pm UTC](https://community.sparkfun.com/t/gnss-rtk-facet-not-charging/69109 "2026-06-23T22:05:01Z")
I have been using a GNSS RTK Facet and need to charge it but I have been unsuccessful using the USB-C port. I have tried using a couple of different wall warts, using the port in my car, and even connecting to a laptop b… --- ## [Utility locating](https://community.sparkfun.com/t/utility-locating/68832)
**Author:** [@njxc500](https://community.sparkfun.com/u/njxc500)\ **Replies:** 12\ **Last updated:** [June 22, 2026, 12:30am UTC](https://community.sparkfun.com/t/utility-locating/68832 "2026-06-22T00:30:59Z")
Hello… We use gps for utility locating and i want to improve speed and accuracy. We currently use a geode gns3, and I tried an rtk surveyor kit last year, but the ntrip corrections don’t seem consistent in the field usi… --- ## [ZED-F9P-01B-01 always cold starts](https://community.sparkfun.com/t/zed-f9p-01b-01-always-cold-starts/68922)
**Author:** [@Neil\_Woodhouse](https://community.sparkfun.com/u/Neil_Woodhouse)\ **Replies:** 7\ **Last updated:** [June 20, 2026, 7:49pm UTC](https://community.sparkfun.com/t/zed-f9p-01b-01-always-cold-starts/68922 "2026-06-20T19:49:23Z")
I have had the GPS RTK2 board for a while and the board no longer hot starts. I have plugged in the board for 12 plus hours and it still won’t hot start after a drive. I am assuming that the battery is toast and from wha… --- ## [Looking for Clarification Regarding the RTK Facet](https://community.sparkfun.com/t/looking-for-clarification-regarding-the-rtk-facet/69085)
**Author:** [@JQuince](https://community.sparkfun.com/u/JQuince)\ **Replies:** 1\ **Last updated:** [June 19, 2026, 1:13pm UTC](https://community.sparkfun.com/t/looking-for-clarification-regarding-the-rtk-facet/69085 "2026-06-19T13:13:40Z")
Good morning. Just asking a question regarding using the RTK Facet for Field Maps on an iPad. There’s a couple inconsistencies on the website. On the page for the RTK facet it states that it’s fully compatible with … --- ## [NEO-F10N - Where can I find the firmware?](https://community.sparkfun.com/t/neo-f10n-where-can-i-find-the-firmware/67622)
**Author:** [@diabetic\_debate](https://community.sparkfun.com/u/diabetic_debate)\ **Replies:** 5\ **Last updated:** [June 19, 2026, 1:24am UTC](https://community.sparkfun.com/t/neo-f10n-where-can-i-find-the-firmware/67622 "2026-06-19T01:24:29Z")
Product: I think i got my board stuck in bootloader mode while trying to diagnose some issues with gpsd and am looking to flash the default firmware back to reset everything. But I can’t seem to find the firmware anyw… --- ## [Power Save Product Improvement Suggestion](https://community.sparkfun.com/t/power-save-product-improvement-suggestion/69068)
**Author:** [@LenS](https://community.sparkfun.com/u/LenS)\ **Replies:** 2\ **Last updated:** [June 18, 2026, 11:33pm UTC](https://community.sparkfun.com/t/power-save-product-improvement-suggestion/69068 "2026-06-18T23:33:36Z")
My use case for my Postcard+PortabilityShield is to walk around for 1-2 hours during which I take 10-20 RTK position readings. I keep the Postcard on and connected to the RTN to avoid the hassle and delay of connecting … --- ## [How Can You Use PyGPSClient to cast to RTK2go?](https://community.sparkfun.com/t/how-can-you-use-pygpsclient-to-cast-to-rtk2go/69060)
**Author:** [@JohnEH](https://community.sparkfun.com/u/JohnEH)\ **Replies:** 7\ **Last updated:** [June 16, 2026, 3:06pm UTC](https://community.sparkfun.com/t/how-can-you-use-pygpsclient-to-cast-to-rtk2go/69060 "2026-06-16T15:06:36Z")
I am trying use a Pi 5 with the Sparkfun RTK Postcard with the LG290P on PyGPSClient to cast to RTK2go. I have credentials from RTK2go to be a base station but I simply cannot find a decent guide on the internet to get i… --- ## [Base/Rover setup with Original RTK Torch and SparkPNT FPM-T](https://community.sparkfun.com/t/base-rover-setup-with-original-rtk-torch-and-sparkpnt-fpm-t/68989)
**Author:** [@ievolve](https://community.sparkfun.com/u/ievolve)\ **Replies:** 17\ **Last updated:** [June 15, 2026, 9:29pm UTC](https://community.sparkfun.com/t/base-rover-setup-with-original-rtk-torch-and-sparkpnt-fpm-t/68989 "2026-06-15T21:29:30Z")
Hello, I am trying to create a very basic base/rover setup. Here are the steps I went through. Loaded firmware 3.3 on both devices and reset them to factory spec. On the base (SparkPNT FPM-T) I did the following from t… --- ## [Moving Base RTK for Vehicle to Vehicle relative positioning](https://community.sparkfun.com/t/moving-base-rtk-for-vehicle-to-vehicle-relative-positioning/69012)
**Author:** [@Tarun\_K](https://community.sparkfun.com/u/Tarun_K)\ **Replies:** 4\ **Last updated:** [June 12, 2026, 3:16pm UTC](https://community.sparkfun.com/t/moving-base-rtk-for-vehicle-to-vehicle-relative-positioning/69012 "2026-06-12T15:16:36Z")
Hello, I want to implement moving base RTK with a moving car (base) and drone (rover) using ZED F9P. I want to use a Telemetry for transmission of correction RTCM data. I am not sure how to implement. Can anyone please … --- ## [Is it always necessary to connect antenna to RTK mosaic-X5?](https://community.sparkfun.com/t/is-it-always-necessary-to-connect-antenna-to-rtk-mosaic-x5/69029)
**Author:** [@IC\_Rhodes](https://community.sparkfun.com/u/IC_Rhodes)\ **Replies:** 5\ **Last updated:** [June 12, 2026, 9:11am UTC](https://community.sparkfun.com/t/is-it-always-necessary-to-connect-antenna-to-rtk-mosaic-x5/69029 "2026-06-12T09:11:34Z")
I just recently purchased a SparkFun RTK mosaic-X5. I have seen statements that powering on similar products without a GNSS antenna connected will harm the unit. Yesterday I went through the Septentrio hardware and ref… --- ## [Does instrument height need to be subtracted from the orthometric height?](https://community.sparkfun.com/t/does-instrument-height-need-to-be-subtracted-from-the-orthometric-height/69027)
**Author:** [@mrlexington](https://community.sparkfun.com/u/mrlexington)\ **Replies:** 3\ **Last updated:** [June 11, 2026, 7:11pm UTC](https://community.sparkfun.com/t/does-instrument-height-need-to-be-subtracted-from-the-orthometric-height/69027 "2026-06-11T19:11:47Z")
I’m using the Sparkfun Surveyor with SW Maps and it’s working great. One thing I’m not sure about is if I need to subtract the instrument height out of the orthometric height? Or does SW Maps make the subtraction automat… --- ## [U‑blox LEA‑F9T Breakout boards](https://community.sparkfun.com/t/u-blox-lea-f9t-breakout-boards/68988)
**Author:** [@cmkauf6](https://community.sparkfun.com/u/cmkauf6)\ **Replies:** 2\ **Last updated:** [June 9, 2026, 6:48am UTC](https://community.sparkfun.com/t/u-blox-lea-f9t-breakout-boards/68988 "2026-06-09T06:48:49Z")
I was wondering if you currently offer any breakout boards for the u‑blox LEA‑F9T for either the LEA-F9P-10B or LEA-F9P-20B receivers. If not, are there any plans to develop one or to incorporate this receiver into futur… --- ## [RTK Express Freezes at (Wifi) Config Menu](https://community.sparkfun.com/t/rtk-express-freezes-at-wifi-config-menu/68992)
**Author:** [@trot85](https://community.sparkfun.com/u/trot85)\ **Replies:** 2\ **Last updated:** [June 9, 2026, 2:08am UTC](https://community.sparkfun.com/t/rtk-express-freezes-at-wifi-config-menu/68992 "2026-06-09T02:08:29Z")
Hello, I’m having some issues with the RTK Express Kit, and posting here in case I am missed an obvious step. I’ve search the forum and couldn’t find a similar issue. I’ve done the bluetooth based position streaming to… --- ## [Stupid Portability Shield Tricks And How To Overcome Them](https://community.sparkfun.com/t/stupid-portability-shield-tricks-and-how-to-overcome-them/68727)
**Author:** [@JohnEH](https://community.sparkfun.com/u/JohnEH)\ **Replies:** 4\ **Last updated:** [June 8, 2026, 9:26pm UTC](https://community.sparkfun.com/t/stupid-portability-shield-tricks-and-how-to-overcome-them/68727 "2026-06-08T21:26:36Z")
If you buy an RTK Postcard with the Portability shield beware soldering headers on the Shield board. I’m pretty good at the soldering game however, somehow, even though I was seemingly quite a distance from the Portabili… --- ## [SparkPNT GNSS Disciplines Oscillator Feature](https://community.sparkfun.com/t/sparkpnt-gnss-disciplines-oscillator-feature/68750)
**Author:** [@jthistle](https://community.sparkfun.com/u/jthistle)\ **Replies:** 1\ **Last updated:** [June 8, 2026, 9:24pm UTC](https://community.sparkfun.com/t/sparkpnt-gnss-disciplines-oscillator-feature/68750 "2026-06-08T21:24:23Z")
First of all, we absolutely love the SparkPNT GNSS Disciplined Oscillator and the Plus version! It would be amazing if you could add an internal header on the PCB for the Spark PNT GNSS Flex modules. We would really lik… --- ## [RTK Surveyor SMA connector detached from board](https://community.sparkfun.com/t/rtk-surveyor-sma-connector-detached-from-board/68949)
**Author:** [@bmit0111](https://community.sparkfun.com/u/bmit0111)\ **Replies:** 5\ **Last updated:** [June 8, 2026, 8:45pm UTC](https://community.sparkfun.com/t/rtk-surveyor-sma-connector-detached-from-board/68949 "2026-06-08T20:45:42Z")
My RTK Surveyor SMA connector has come off the board. I have tried to initiate a RMA but have been informed i need to put this in the forum first. My unit is out of warranty and i purchased through Core Electronics in Au… --- ## [Ublox New Chip X20](https://community.sparkfun.com/t/ublox-new-chip-x20/60928)
**Author:** [@djchadli](https://community.sparkfun.com/u/djchadli)\ **Replies:** 17\ **Last updated:** [June 8, 2026, 11:20am UTC](https://community.sparkfun.com/t/ublox-new-chip-x20/60928 "2026-06-08T11:20:45Z")
Ublox annouced new RTK chip X20 based on the F9, very good news, means we can see FACET 2 GNSS receiver by 2025 maybe. --- ## [Postcard RTK: Results Presentation in Poster Format at IGS Workshop 2026 in Chile](https://community.sparkfun.com/t/postcard-rtk-results-presentation-in-poster-format-at-igs-workshop-2026-in-chile/68771)
**Author:** [@amlago](https://community.sparkfun.com/u/amlago)\ **Replies:** 4\ **Last updated:** [June 7, 2026, 10:51pm UTC](https://community.sparkfun.com/t/postcard-rtk-results-presentation-in-poster-format-at-igs-workshop-2026-in-chile/68771 "2026-06-07T22:51:01Z")
Postcard RTK: Results Presentation in Poster Format at IGS Workshop 2026 in Chile Hello everyone, and to @sparky and @PaulZC I wanted to let you know that data from our Postcard with portability shield will be presente… --- ## [Issue in X20P firmware update through U-center 2](https://community.sparkfun.com/t/issue-in-x20p-firmware-update-through-u-center-2/68968)
**Author:** [@Milan\_John](https://community.sparkfun.com/u/Milan_John)\ **Replies:** 1\ **Last updated:** [June 4, 2026, 10:12am UTC](https://community.sparkfun.com/t/issue-in-x20p-firmware-update-through-u-center-2/68968 "2026-06-04T10:12:37Z")
I have tried to do the firmware update on my x20p module by connecting it to u-center 2. The update is not happening. Below I have attached the snippet during the update. How do i perform the update on the module via… --- ## [Culmination Of What I've been trying to accomplish with RTK](https://community.sparkfun.com/t/culmination-of-what-ive-been-trying-to-accomplish-with-rtk/68900)
**Author:** [@JohnEH](https://community.sparkfun.com/u/JohnEH)\ **Replies:** 3\ **Last updated:** [June 2, 2026, 9:52pm UTC](https://community.sparkfun.com/t/culmination-of-what-ive-been-trying-to-accomplish-with-rtk/68900 "2026-06-02T21:52:21Z")
First of all thanks to this community as I learned a ton by reading a whole lot of posts here. Back story: I have been dabbling with GNSS chips for a number of years for no other reason than to blog about them. In most… --- ## [RTK Postcard error on upload](https://community.sparkfun.com/t/rtk-postcard-error-on-upload/68926)
**Author:** [@KMU69](https://community.sparkfun.com/u/KMU69)\ **Replies:** 16\ **Last updated:** [June 2, 2026, 4:23pm UTC](https://community.sparkfun.com/t/rtk-postcard-error-on-upload/68926 "2026-06-02T16:23:18Z")
I am trying to perform a simple test of the RTK Postcard but receive the following error when trying to upload this sketch: /\* SparkFun RTK Postcard - Hardware Serial GNSS Test Sketch This sketch reads raw NMEA senten… --- ## [RTK Facet not turning on](https://community.sparkfun.com/t/rtk-facet-not-turning-on/68930)
**Author:** [@Trevor\_Smouter](https://community.sparkfun.com/u/Trevor_Smouter)\ **Replies:** 1\ **Last updated:** [June 2, 2026, 7:39am UTC](https://community.sparkfun.com/t/rtk-facet-not-turning-on/68930 "2026-06-02T07:39:00Z")
Hi, my facet won’t turn on with the power button. Following other posts, I opened the unit, made sure all the flex cables were reseated but no luck. The internal power button works, with that the unit powers up and fun… --- ## [Mosaic-x5 : what is the operating temperature?](https://community.sparkfun.com/t/mosaic-x5-what-is-the-operating-temperature/68925)
**Author:** [@sebs](https://community.sparkfun.com/u/sebs)\ **Replies:** 1\ **Last updated:** [June 1, 2026, 7:55pm UTC](https://community.sparkfun.com/t/mosaic-x5-what-is-the-operating-temperature/68925 "2026-06-01T19:55:34Z")
Dear all, we have a mosaic-X5 installed in a cabinet, the system is power by solar panels and the cabinet is exposed to sun. There are several other electronic systems in the same cabinet, they all measure their board t… --- ## [Configuration persistence, non-volatile flash, BBR. (timing breakout)](https://community.sparkfun.com/t/configuration-persistence-non-volatile-flash-bbr-timing-breakout/68921)
**Author:** [@PulsePerSec](https://community.sparkfun.com/u/PulsePerSec)\ **Replies:** 1\ **Last updated:** [June 1, 2026, 6:13am UTC](https://community.sparkfun.com/t/configuration-persistence-non-volatile-flash-bbr-timing-breakout/68921 "2026-06-01T06:13:20Z")
regarding, SparkFun GNSS Timing Breakout - ZED-F9T (Qwiic) SKU: GPS-18774 We must modify some configuration items, as well as a dozen or so other ones not shown (CFG-TP-FREQ\_TP1 , CFG-TP-FREQ\_LOCK\_TP1, CFG-TP-PULSE\_LEN… --- ## [GLONASS on U-blox ZED-X20P](https://community.sparkfun.com/t/glonass-on-u-blox-zed-x20p/67164)
**Author:** [@Christian\_Kohler](https://community.sparkfun.com/u/Christian_Kohler)\ **Replies:** 5\ **Last updated:** [May 29, 2026, 8:01pm UTC](https://community.sparkfun.com/t/glonass-on-u-blox-zed-x20p/67164 "2026-05-29T20:01:40Z")
I have the SparkFun Allband GNSS RTK Breakout - ZED-X20P. I know the specs show that it does not support GLONASS, but I’ve seen a couple of suggestions that this chip is capable of receiving GLONASS, and I wonder what i… --- ## [RTK Postcard On Survey Rod](https://community.sparkfun.com/t/rtk-postcard-on-survey-rod/68898)
**Author:** [@JohnEH](https://community.sparkfun.com/u/JohnEH)\ **Replies:** 1\ **Last updated:** [May 27, 2026, 10:27pm UTC](https://community.sparkfun.com/t/rtk-postcard-on-survey-rod/68898 "2026-05-27T22:27:04Z")
Has anyone taken their basic Postcard and Portability shield and affixed it to a survey rod? And if so, is that practical? I just pulled my survey data locally and finessed it through QGIS to give me survey waypoints f… --- ## [SparkPNT FPM SD Card Mounting](https://community.sparkfun.com/t/sparkpnt-fpm-sd-card-mounting/68794)
**Author:** [@CHENAGAR](https://community.sparkfun.com/u/CHENAGAR)\ **Replies:** 11\ **Last updated:** [May 26, 2026, 10:38pm UTC](https://community.sparkfun.com/t/sparkpnt-fpm-sd-card-mounting/68794 "2026-05-26T22:38:24Z")
Hi, I am trying to figure out how to log RINEX files to the SD card on the FPM. I am using a 32 gb SDHC class 10 card formatted to FAT32. I am able to see log files recorded from the sparkpnt firmware, but the septentrio… --- ## [Sparkfun Facet - not charging possibly due to loose USB-C](https://community.sparkfun.com/t/sparkfun-facet-not-charging-possibly-due-to-loose-usb-c/68162)
**Author:** [@Chia\_Chang](https://community.sparkfun.com/u/Chia_Chang)\ **Replies:** 11\ **Last updated:** [May 26, 2026, 7:04pm UTC](https://community.sparkfun.com/t/sparkfun-facet-not-charging-possibly-due-to-loose-usb-c/68162 "2026-05-26T19:04:40Z")
I purchased the Sparkfun Facet recently (1month ago) and I’m experiencing charging issues. The USB-C feels loose and will only charge after multiple attempts on inserting the USB-C. Sometimes, charging LED does turn on… --- ## [Which LoRa radio with SparkPNT FPL?](https://community.sparkfun.com/t/which-lora-radio-with-sparkpnt-fpl/68475)
**Author:** [@Samufun](https://community.sparkfun.com/u/Samufun)\ **Replies:** 6\ **Last updated:** [May 26, 2026, 3:50pm UTC](https://community.sparkfun.com/t/which-lora-radio-with-sparkpnt-fpl/68475 "2026-05-26T15:50:11Z")
I just ordered SparkPNT FPL. I’m not sure which kind of LoRa radio do I need for setting up RTCM between my RTK base station and the FPL. The base station is Raspberry Pi 5 with Flex pHAT. Could I use SparkFun Pro RF wi… --- ## [SWmaps: Local Coordinate System with Transverse Mercator Projection](https://community.sparkfun.com/t/swmaps-local-coordinate-system-with-transverse-mercator-projection/68836)
**Author:** [@amlago](https://community.sparkfun.com/u/amlago)\ **Replies:** 3\ **Last updated:** [May 26, 2026, 12:01pm UTC](https://community.sparkfun.com/t/swmaps-local-coordinate-system-with-transverse-mercator-projection/68836 "2026-05-26T12:01:47Z")
SWmaps: Local Coordinate System with Transverse Mercator Projection Hi everyone: This cold Sunday forced me to investigate SWmaps details. I wanted to generate a local reference system with a transverse Mercator projec… [Previous page](https://community.sparkfun.com/c/global-positioning-system-gps/96.md?page=1) [Next page](https://community.sparkfun.com/c/global-positioning-system-gps/96.md?page=3)