Sorry if this is not the appropriate forum to post but I'm not sure where else to go. I'm posting here because of the genius level of the guys and girls in the OpenWRT world and figured someone here can help me.
I've been using OpenWRT on many of my TP-Link devices but one is not supported and I use the official firmware, but they have updated it and caused problems.
The device is Archer VR600 v2 using the AU firmware which is the same as EU. I require a feature that was available in previous firmwares but with the last update the feature has been re-designed and no longer functions as needed.
To make it worse they have disabled firmware downgrade of the previous firmware. I have confirmed this with them and they said it was to prevent a "security issue". I think more likely they ran out of nvram and stripped back other things.
They have a new feature called TP-Link Cloud for managing iOT devices in the home and I would assume this means cutting back on other services as the firmware files are similar size.
So the point of writing here. Can someone please help me to work out TFTP on this device to force an older firmware or can someone please modify an older firmware header to force the modem into accepting a downgrade.