# ST P-Nucleo-LRWAN2 stopped working

**URL:** <https://www.thethingsnetwork.org/forum/t/st-p-nucleo-lrwan2-stopped-working/43127>\
**Category:** Uncategorized\
**Created:** [January 22, 2021, 11:40am UTC](https://www.thethingsnetwork.org/forum/t/st-p-nucleo-lrwan2-stopped-working/43127 "2021-01-22T11:40:25Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**Author:** ![cslorabox](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/cslorabox/32/35697_2.png) [@cslorabox](https://www.thethingsnetwork.org/forum/u/cslorabox)\
**Post date:** [January 22, 2021, 7:34pm UTC](https://www.thethingsnetwork.org/forum/t/st-p-nucleo-lrwan2-stopped-working/43127/10 "2021-01-22T19:34:49Z")

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> [@DashCanTtn](#):
>
> It seems that the Accept is _ **always** _ sent on 869.525 - but the Request is sent on various frequencies

Yes, it’s being sent in the EU868 join RX2 window, which uses fixed settings.

That _might_ hint at your problem though: TTN _normally_ uses non-standard RX2 settings of SF9BW125, but for join RX2 still needs standard SF12BW125.

It’s possible that if your node has been configured for TTN, it’s mistakenly listening during _join_ RX2 at SF9 rather than SF12, by confusing what it would be told in the join accept to do for _ordinary_ (not join) RX2.

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