@kazade
There are known issues with the RPi Zero W wifi driver (NTP for example is busted without using tcpdump to correct some packet-level issues). Once the driver is fixed the tcpdump process won't be required (it isn't when using other WiFi adapters), but until then Band-Aids are what we've got to work with.
As for the 5637 it's a CDC-ACM device so no drivers required - the major thing that makes it incompatible with DreamPi is that it acknowledges the ATA command with "OK" before issuing "CONNECT", causing DreamPi to try to setup the connection with pon before the modem is ready. Simply making sure to check the ATA output explicitly for "CONNECT" fixes the issue and allows it to work.
One other thing - I've done my own dedicated RPi firmware development before (http://psx-scene.com/forums/f19/how-bui ... s2-127728/) but I used buildroot to cook up a custom Linux, which makes updating to support the latest Kernel/driver fixes super simple and allows for extremely low boot times (4-7 seconds depending on installation method) and drag and drop firmware updates (longer boot times but no need for EXT partitions). Would you be interested in moving DreamPi to a Buildroot platform? I could probably do all the heavy lifting, I'd would just need to know exactly what needs to run for any services beyond dreampi.py/pon. Just an idea .
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