# RF (433mhz) not working?

**URL:** <https://community.homey.app/t/rf-433mhz-not-working/51022>\
**Category:** Questions & Help\
**Created:** [August 31, 2021, 6:40pm UTC](https://community.homey.app/t/rf-433mhz-not-working/51022 "2021-08-31T18:40:52Z")\
**Posts on this page:** 1\
**Showing post:** 11

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**Author:** ![Dijker](https://avatars.discourse-cdn.com/v4/letter/d/b9bd4f/32.png) [@Dijker](https://community.homey.app/u/Dijker)\
**Post date:** [September 4, 2021, 6:48pm UTC](https://community.homey.app/t/rf-433mhz-not-working/51022/11 "2021-09-04T18:48:15Z")

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> [@How to rollback firmware from V 5.0 back to V 4.20](https://community.homey.app/t/how-to-rollback-firmware-from-v-5-0-back-to-v-4-20/32796/14):
>
> Hi Jamie! Yes ofcourse! I have procedure how to restore Homey but it doesnt work for me. Now i made factory reset one more time but still V5.0.xx load. What i was doing: 1.Checked in homey developer that experimental tab ticked off 2.Checked in Homey app that all experimental ticks are off and ticked of automatic update. 3. Chrome web browser open [setup.athom.com](http://setup.athom.com/) , proced until when need to connect to Homey setup SSID 4.Turned homey upp and down, count from 10-0 , connected to Homey set…

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