I have a new NanoBridge M3 running AirOS firmware XM.v5.6.11. There are many comments about firmware level on the forums and I'm not clear if I have to downgrade before loading AREDN or if I can just tftp the AREDN load with the current 5.6.11 AirOS.
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https://www.arednmesh.org/content/how-install-aredn-firmware