# RX\_OFDM.grc not working on LimeSDR

**URL:** <https://discourse.myriadrf.org/t/rx-ofdm-grc-not-working-on-limesdr/7035>\
**Category:** LimeSDR\
**Created:** [20 March 2021 19:19 UTC](https://discourse.myriadrf.org/t/rx-ofdm-grc-not-working-on-limesdr/7035 "2021-03-20T19:19:19Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![andremartins4](https://avatars.discourse-cdn.com/v4/letter/a/dbc845/32.png) [@andremartins4](https://discourse.myriadrf.org/u/andremartins4)\
**Post date:** [20 March 2021 19:19 UTC](https://discourse.myriadrf.org/t/rx-ofdm-grc-not-working-on-limesdr/7035/1 "2021-03-20T19:19:19Z")

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Hi,  
I have been trying to adapt the rx\_ofdm.grc example for binary file transfer, although nothing appears on the RX side when I connect the LimeSDR sinks.

Has anyone been able to successfully implement this? If not any suggestion how should I proceed to accomplish a BPSK/QPSK file transfer using the LimeSDR and the GnuRadio?

Thanks in advance

 ![ofdm_transceiver](https://canada1.discourse-cdn.com/flex034/uploads/myriadrf/original/2X/f/fc5a7cd22438c9060ad56167cdebcdc9ffaa1e46.png)

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**Author:** ![phoenix](https://avatars.discourse-cdn.com/v4/letter/p/0ea827/32.png) [@phoenix](https://discourse.myriadrf.org/u/phoenix)\
**Post date:** [3 August 2021 00:15 UTC](https://discourse.myriadrf.org/t/rx-ofdm-grc-not-working-on-limesdr/7035/2 "2021-08-03T00:15:03Z")

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Hi @andremartins4,

I’ve been trying to make it work with LimeSDR mini but failed. Have you found any solutions yet?

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**Author:** ![mzs](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/mzs/32/2678_2.png) [@mzs](https://discourse.myriadrf.org/u/mzs)\
**Post date:** [3 August 2021 05:58 UTC](https://discourse.myriadrf.org/t/rx-ofdm-grc-not-working-on-limesdr/7035/3 "2021-08-03T05:58:14Z")

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I was wondering where this rx\_ofdm.grc was from, and I think I found where ? [https://github.com/gnuradio/gnuradio/tree/master/gr-digital/examples/ofdm](https://github.com/gnuradio/gnuradio/tree/master/gr-digital/examples/ofdm)

Have you tried asking for help with gnuradio on the gnuradio IRC channel ? [https://wiki.gnuradio.org/index.php/Chat](https://wiki.gnuradio.org/index.php/Chat) ( Typically IRC is slower than some snail mail. Basically ask a question and hang around for 24+ hours for a reply, somebody in any timezone will eventually see the question and respond ).

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**Author:** ![phoenix](https://avatars.discourse-cdn.com/v4/letter/p/0ea827/32.png) [@phoenix](https://discourse.myriadrf.org/u/phoenix)\
**Post date:** [3 August 2021 06:23 UTC](https://discourse.myriadrf.org/t/rx-ofdm-grc-not-working-on-limesdr/7035/4 "2021-08-03T06:23:20Z")

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Thanks @mzs for the IRC recommendation. I thought to check with LimeSDR community first 🙂