# RTK can't be recognized

**URL:** <https://discuss.px4.io/t/rtk-cant-be-recognized/31374>\
**Category:** PX4 Autopilot\
**Created:** [March 24, 2023, 8:20am UTC](https://discuss.px4.io/t/rtk-cant-be-recognized/31374 "2023-03-24T08:20:29Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![JohnnyRyan](https://discuss.px4.io/user_avatar/discuss.px4.io/johnnyryan/32/12748_2.png) [@JohnnyRyan](https://discuss.px4.io/u/JohnnyRyan)\
**Post date:** [March 24, 2023, 8:20am UTC](https://discuss.px4.io/t/rtk-cant-be-recognized/31374/1 "2023-03-24T08:20:29Z")

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QGC version 4.3.5 with CUAV C-RTK9P RTK,  
Followed the official guidance setting GPS\_1\_CONFIG to GPS 1 and GPS\_2\_CONFIG to TELEM 2.  
But the RTK seems can’t be recognized correctly and having no data output to QGC.  
Anyone know about the reason?  
Please help.

 ![0816b6c5e3e459a59f5c7f775e623cf](https://discuss.px4.io/uploads/default/original/2X/2/28e9a574010b7cabbafbd31f471d87e8d2565e5a.jpeg)  
 ![9281de2acbf19a55376b8f9ca96a3db](https://discuss.px4.io/uploads/default/original/2X/0/08b4e0468453a3c41202d909ee1aa7ae78c5d8eb.jpeg)  
 ![b38e69035bf890a1559223e9fda2cf4](https://discuss.px4.io/uploads/default/original/2X/4/497e3285c734fdd1d019b351fe892d901895be60.jpeg)

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**Author:** ![JulianOes](https://discuss.px4.io/user_avatar/discuss.px4.io/julianoes/32/30_2.png) [@JulianOes](https://discuss.px4.io/u/JulianOes)\
**Post date:** [March 25, 2023, 6:21am UTC](https://discuss.px4.io/t/rtk-cant-be-recognized/31374/2 "2023-03-25T06:21:39Z")

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So you want to use RTK? And you have an RTK station connected to QGC that sends up RTCM corrections?

Which docs did you follow?

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**Author:** ![JohnnyRyan](https://discuss.px4.io/user_avatar/discuss.px4.io/johnnyryan/32/12748_2.png) [@JohnnyRyan](https://discuss.px4.io/u/JohnnyRyan)\
**Post date:** [March 28, 2023, 1:25am UTC](https://discuss.px4.io/t/rtk-cant-be-recognized/31374/3 "2023-03-28T01:25:48Z")

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> **[GPS & Compass | PX4 User Guide](https://docs.px4.io/main/en/gps_compass/)**
>
> PX4 is the Professional Autopilot. Developed by world-class developers from industry and academia, and supported by an active world wide community, it powers all kinds of vehicles from racing and cargo drones through to ground vehicles and...

This one and google translated to Chinese

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<div class="post-metadata">

**Author:** ![JulianOes](https://discuss.px4.io/user_avatar/discuss.px4.io/julianoes/32/30_2.png) [@JulianOes](https://discuss.px4.io/u/JulianOes)\
**Post date:** [March 30, 2023, 5:00am UTC](https://discuss.px4.io/t/rtk-cant-be-recognized/31374/4 "2023-03-30T05:00:22Z")

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What’s your RTK base station? You need to have a RTK correction capable GPS (such as the ones based on the uBlox F9P) on the ground connected via USB to QGroundControl.

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**Author:** ![JohnnyRyan](https://discuss.px4.io/user_avatar/discuss.px4.io/johnnyryan/32/12748_2.png) [@JohnnyRyan](https://discuss.px4.io/u/JohnnyRyan)\
**Post date:** [March 30, 2023, 6:38am UTC](https://discuss.px4.io/t/rtk-cant-be-recognized/31374/5 "2023-03-30T06:38:54Z")

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Thanks for the notice,  
Though we had already gotten that RTK correction connected to our QGC and followed the whole instruction before we discovered this issue.  
We sent the hardware to a trusted service group in China now, hoping that they could deal with it.