FYI -- This tiny $12 zsun device simply plugs into a USB port (for power) and 
you talk to it with wifi:

This zsun device talks ONLY wifi, so you have to keep one wifi AP open to talk 
to the device itself.

I highly recommend using the OpenWRT "extroot /overlay" technique with this 
zsun device -- NOT because it needs more flash memory, but because it makes 
possible to quickly recover if you make a configuration error: you simply take 
the little micro SD card out, put it into a PC, change the config files back to 
something sane, re-insert the uSD back into the zsun, and reboot.  Beats the 
heck out of a bricked zsun device.


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