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Unifi AP not broadcasting any radio signal
Posted by on 05 August 2015 04:00 PM

I managed to get this Unifi AP working again. It had been not broadcasting any radio signal, despite any powering on/powering off and all settings I could find seemed correct. If I SSH'd into it and typed "iwconfig" + Enter, the wireless cards "wifi0", "ath0", "ath1", and "ath2" were not showing up.

I basically followed what is described here:
http://community.ubnt.com/t5/UniFi-Wireless/UniFi-AP-SSH-factory-default-commands/td-p/142182
What I did was:
1. Use SSH to remotely log into the AP's command line interface.
2. Perform factory reset by typing the command: "syswrapper.sh restore-default" + Enter
3. Reboot the AP with the command: "reboot" + Enter

That should have been it, but I lost contact with the AP; it didn't seem to reboot successfully. I came to St. Hilary and found it powered off, yet plugged in to a working POE. So the final step was:
4. Unplug it for 2 or 3 minutes, then re-plug it (re-plugging it right away didn't cause it to power on).

It is now broadcasting again, and everything working. The 4 wireless cards mentioned above are all showing up. Didn't have to re-set the password (admin, peacenow), it was saved despite the "factory reset".

Maybe that will help someone if they see a similar issue.

Not sure whether the same could have been achieved by holding the Reset button.

David

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