Looks like 3.0.0b02 experimental is available!

did we have a bbhnrecoverymode option prior to this release??

Officially, no.

It slipped in to the first 3.0.0 beta but was withheld under concerns of timing of button press length.  It is also avaliable ONLY on Ubiquiti at this time.   5 seconds is a reset of password and re-enable dhcp ( great if you hit MESH AP mode accidentally) and 15 seconds to restore to "just flashed" (removes any installed programs add on patches and resets all configs)

It hasn't been announced yet to the masses.  It’s not considered secret, just experimental.

What it does:
1) It turns off OLSR and disconnects from mesh mode (you need to be DIRECTLY connected to the Ethernet port when you run it)
2) It switches the wifi interface into a listen only mode
3) It updates the LED's to show the receive signal strength (See signal levels chart below)
4) It outputs to the console the received signal strength at a rapid rate so you can aim the antenna.

Usage Instructions:
Only run this on one side of the link at a time, the other side needs to be in normal mode for the beacon packets to be sent.

1) Make sure your node is configured as a mesh node first (the script makes some assumptions about operations interfaces so make sure the node has already been setup and is in config=mesh  mode)
2) Log onto the node you wish to aim via Telnet or SSH
3) type: aimer BroadbandHamnet-20-v3 (or whatever SSID you use)
4) Aim  your antenna
5) cntrl + c to stop the script

LED=received signal strength
4=-45 dBm   Top GREEN led
3=-55 dBm 
2=-65 dBm 
1=-75 dBm   Bottom RED led (anything lower than -75 will not illuminate the LED's)

Andre, K6AH

Thanks Andre.
Looks very useful!  In my testing, it doesn't seem to exit cleanly in all cases (sometimes a power cycle to get it back).

I also added a nice change to the config/system file to run this when the reset button is pressed for 1-2 secs.  Great for "in-the-field work".

Darryl