# ADS-B only by chance

**URL:** <https://discuss.cubepilot.org/t/ads-b-only-by-chance/8031>\
**Category:** ADS-B\
**Created:** [15 December 2021 22:27 UTC](https://discuss.cubepilot.org/t/ads-b-only-by-chance/8031 "2021-12-15T22:27:13Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![aj265](https://discuss.cubepilot.org/user_avatar/discuss.cubepilot.org/aj265/32/4439_2.png) [@aj265](https://discuss.cubepilot.org/u/aj265)\
**Post date:** [15 December 2021 22:27 UTC](https://discuss.cubepilot.org/t/ads-b-only-by-chance/8031/1 "2021-12-15T22:27:13Z")

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Hi altogether,

these are my ADS-B configurations. Unfortunately it works randomly (e.g. shows me other airplane in QGC or MissionPlanner only every now and than) and I have no idea, what exactly may be the cause for that:

 ![grafik](https://discuss.cubepilot.org/uploads/default/original/2X/a/a7599471593c22589f59d40bcd2e7335b18dfaa6.png)

Anybody got an idea?

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**Author:** ![Sven](https://discuss.cubepilot.org/user_avatar/discuss.cubepilot.org/sven/32/3367_2.png) [@Sven](https://discuss.cubepilot.org/u/Sven)\
**Post date:** [15 December 2021 23:15 UTC](https://discuss.cubepilot.org/t/ads-b-only-by-chance/8031/2 "2021-12-15T23:15:24Z")

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Your radius is set to 0?

Which would mean it ignores all airplanes. You may set it to a reasonable range like 10000m or whatsoever.

My ADSB\_RF\_CAPABLE is set to 3.

I am on copter 4.0.7.

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**Author:** ![aj265](https://discuss.cubepilot.org/user_avatar/discuss.cubepilot.org/aj265/32/4439_2.png) [@aj265](https://discuss.cubepilot.org/u/aj265)\
**Post date:** [17 December 2021 12:59 UTC](https://discuss.cubepilot.org/t/ads-b-only-by-chance/8031/3 "2021-12-17T12:59:46Z")

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@Sven - You are absolutely right 🙄 - I had this parameter already on another value but did’nt realiize that somehow it changed back to 0. Thanks.

Now it works if the copter is attached via USB-cable to MissionPlanner and here (MP) I see the airplanes around me. In QGC I don’t see anything 🤯

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**Author:** ![RoboMotic](https://discuss.cubepilot.org/user_avatar/discuss.cubepilot.org/robomotic/32/947_2.png) [@RoboMotic](https://discuss.cubepilot.org/u/RoboMotic)\
**Post date:** [21 December 2021 18:12 UTC](https://discuss.cubepilot.org/t/ads-b-only-by-chance/8031/4 "2021-12-21T18:12:31Z")

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Hi Sven  
If I read ADSB\_LIST\_RADIUS description, I understand 0 will remove the filter, so must show all the vehicles it detect, or im wrong? the same wi tht ADSB\_LIST\_ALT filter.

thanks

 ![imagen](https://discuss.cubepilot.org/uploads/default/original/2X/4/423ffd9a69e56cabe22def6fdd8bfa4617847056.png)

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**Author:** ![RoboMotic](https://discuss.cubepilot.org/user_avatar/discuss.cubepilot.org/robomotic/32/947_2.png) [@RoboMotic](https://discuss.cubepilot.org/u/RoboMotic)\
**Post date:** [21 December 2021 18:17 UTC](https://discuss.cubepilot.org/t/ads-b-only-by-chance/8031/5 "2021-12-21T18:17:12Z")

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May be you want to try SR1\_ADSB or SR2\_ADSB to 2, depend if you are using telem1 or telem2

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**Author:** ![Sven](https://discuss.cubepilot.org/user_avatar/discuss.cubepilot.org/sven/32/3367_2.png) [@Sven](https://discuss.cubepilot.org/u/Sven)\
**Post date:** [21 December 2021 18:42 UTC](https://discuss.cubepilot.org/t/ads-b-only-by-chance/8031/6 "2021-12-21T18:42:16Z")

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Oh. Yes. I never read the document til the end obviously. So Radius 0 should not be the issue.