# Slow RFD868x-EU

**URL:** <https://discuss.px4.io/t/slow-rfd868x-eu/27456>\
**Category:** PX4 Autopilot\
**Created:** [May 16, 2022, 10:54am UTC](https://discuss.px4.io/t/slow-rfd868x-eu/27456 "2022-05-16T10:54:42Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![pacak](https://discuss.px4.io/letter_avatar_proxy/v4/letter/p/76d3ee/32.png) [@pacak](https://discuss.px4.io/u/pacak)\
**Post date:** [May 16, 2022, 10:54am UTC](https://discuss.px4.io/t/slow-rfd868x-eu/27456/1 "2022-05-16T10:54:42Z")

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Hi,

Does anyone have experience with the following telemetry radio?  
We are experiencing extremely slow communication. It takes few minutes just to initialize.

I have tried different firmware, baud rates, setting up serial port, etc., but nothing seems to work.

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**Author:** ![JAEPIL\_YOO](https://discuss.px4.io/user_avatar/discuss.px4.io/jaepil_yoo/32/5794_2.png) [@JAEPIL\_YOO](https://discuss.px4.io/u/JAEPIL_YOO)\
**Post date:** [May 16, 2022, 4:11pm UTC](https://discuss.px4.io/t/slow-rfd868x-eu/27456/2 "2022-05-16T16:11:16Z")

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1. Check communication devices of the same frequency around.
2. RFD Firmware downgrade
3. FC Firmware Initialization

Do it in order.

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**Author:** ![ryanjAA](https://discuss.px4.io/user_avatar/discuss.px4.io/ryanjaa/32/4035_2.png) [@ryanjAA](https://discuss.px4.io/u/ryanjAA)\
**Post date:** [May 16, 2022, 4:50pm UTC](https://discuss.px4.io/t/slow-rfd868x-eu/27456/3 "2022-05-16T16:50:54Z")

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Yes. Lots of experience. Where are you based out of?

Reason is, in some locations there is a lot of traffic on the band you’re using and anecdotally or not, it is really slow.

Also, increase the air baud rate one level from the gui. You lose a little range but it increases speed dramatically.

I’ve seen this more on 868 than 900 radios.

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**Author:** ![pacak](https://discuss.px4.io/letter_avatar_proxy/v4/letter/p/76d3ee/32.png) [@pacak](https://discuss.px4.io/u/pacak)\
**Post date:** [May 17, 2022, 6:17am UTC](https://discuss.px4.io/t/slow-rfd868x-eu/27456/4 "2022-05-17T06:17:15Z")

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Will try both.  
Thanks.

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**Author:** ![Pinar\_Albayrak](https://discuss.px4.io/user_avatar/discuss.px4.io/pinar_albayrak/32/16203_2.png) [@Pinar\_Albayrak](https://discuss.px4.io/u/Pinar_Albayrak)\
**Post date:** [April 21, 2024, 8:04pm UTC](https://discuss.px4.io/t/slow-rfd868x-eu/27456/5 "2024-04-21T20:04:16Z")

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Hi ryanjAA I have an RFD 868x model telemetry, but its problem does not appear on the RFD 900Tools screen (both ground telemetry and air telemetry). And a solid red light is on in one of my telemeters. It is in boot mode, but I cannot restore the previous software. What should I do? No matter what I do, the red light does not go away. and they did not appear on the tools screen.

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**Author:** ![ryanjAA](https://discuss.px4.io/user_avatar/discuss.px4.io/ryanjaa/32/4035_2.png) [@ryanjAA](https://discuss.px4.io/u/ryanjAA)\
**Post date:** [April 24, 2024, 12:54pm UTC](https://discuss.px4.io/t/slow-rfd868x-eu/27456/6 "2024-04-24T12:54:59Z")

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Read the section in the manual about forcing the bootloader. You short a specific pin to then upload the firmware. If that doesn’t work trash it and buy another because something else is broken.