# Does not detect NMEA GPS input in QGroudcontrol

**URL:** <https://discuss.bluerobotics.com/t/does-not-detect-nmea-gps-input-in-qgroudcontrol/19537>\
**Category:** ArduSub\
**Created:** [February 25, 2025, 8:48pm UTC](https://discuss.bluerobotics.com/t/does-not-detect-nmea-gps-input-in-qgroudcontrol/19537 "2025-02-25T20:48:51Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Albert1981](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/albert1981/32/8498_2.png) [@Albert1981](https://discuss.bluerobotics.com/u/Albert1981)\
**Post date:** [February 25, 2025, 8:48pm UTC](https://discuss.bluerobotics.com/t/does-not-detect-nmea-gps-input-in-qgroudcontrol/19537/1 "2025-02-25T20:48:51Z")

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Since I changed the Pixhawk card for the Navigator, it no longer recognizes the NMEA GGA data input to be able to put the GPS coordinates in the Overlay.  
As you can see in the photos I use a NMEA ROUTER for the NMAE input signal with BAUDRADE 115000.

Thanks a lot  
@EliotBR@tony-white@Boko

 ![foto2](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/e/ea794e7caed25f8f059e56efb7d329a49612e50a.png)  
 ![foto3](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/f/fa1476c2f6af5656d1f4f5a93b4e66151b2ff6a1.jpeg)  
 ![foto4](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/9/9463188d68d1785d70468cc87fed352dab166575.jpeg)  
 ![20250226_102146](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/f/fcf2cfb0873ffde7bc369f9d78de400ee093eb32.jpeg)

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**Author:** ![QSTAR](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/qstar/32/5528_2.png) [@QSTAR](https://discuss.bluerobotics.com/u/QSTAR)\
**Post date:** [February 26, 2025, 9:29am UTC](https://discuss.bluerobotics.com/t/does-not-detect-nmea-gps-input-in-qgroudcontrol/19537/2 "2025-02-26T09:29:29Z")

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@Albert1981 As I can see it seems that you have the serial Bridge setup and also the NMEA Injector seems with the correct port. I see that you are getting the EKF3 requesting the GPS data… @EliotBR what do you think?

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**Author:** ![QSTAR](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/qstar/32/5528_2.png) [@QSTAR](https://discuss.bluerobotics.com/u/QSTAR)\
**Post date:** [February 26, 2025, 10:35am UTC](https://discuss.bluerobotics.com/t/does-not-detect-nmea-gps-input-in-qgroudcontrol/19537/3 "2025-02-26T10:35:00Z")

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@Albert1981 can you please advice wich version you have of the BlueOS and Ardupilot (Navigator)?

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**Author:** ![Albert1981](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/albert1981/32/8498_2.png) [@Albert1981](https://discuss.bluerobotics.com/u/Albert1981)\
**Post date:** [February 26, 2025, 10:48am UTC](https://discuss.bluerobotics.com/t/does-not-detect-nmea-gps-input-in-qgroudcontrol/19537/4 "2025-02-26T10:48:41Z")

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The Ardupilot 4.5.1 (stable) BluesOs: Latest. And I still don’t understand what the EKF3 message means, if someone could explain it to me it would be a pleasure.

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**Author:** ![QSTAR](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/qstar/32/5528_2.png) [@QSTAR](https://discuss.bluerobotics.com/u/QSTAR)\
**Post date:** [February 26, 2025, 10:54am UTC](https://discuss.bluerobotics.com/t/does-not-detect-nmea-gps-input-in-qgroudcontrol/19537/5 "2025-02-26T10:54:33Z")

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Thank you @Albert1981 I have tried to replicate your settings: Please adjust these settings at the QGC:  
GPS\_TYPE set it to MAV and also in the Advance settings of this parameter insert the following Manual entry: 14

Reboot the vehicle and please ler me know hot it goes. Position data should appear.

 ![20250226_114821](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/7/7e22312ddeb5ea79c8cc4cda2fdc337e4504ada0.jpeg)

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<div class="post-metadata">

**Author:** ![Albert1981](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/albert1981/32/8498_2.png) [@Albert1981](https://discuss.bluerobotics.com/u/Albert1981)\
**Post date:** [February 26, 2025, 2:48pm UTC](https://discuss.bluerobotics.com/t/does-not-detect-nmea-gps-input-in-qgroudcontrol/19537/6 "2025-02-26T14:48:46Z")

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Yes, it works! After days of trying…  
Thank you very much, you are always there!