Might want to be careful about that - unless there's level translation circuitry in there, you are putting substantial stress on the MT7688 serial pins (input especially) by connecting that 3.3v device to a 5v Arduino.
This is one of the issues I have with the Omega2 as against the Omega1. The Omega1 runs on the same 3.3v but the IO pins were explicitly stated to be 5v tolerant. They play well with Arduino and Arduino shields running on 5v.
I even produced an Arduino Expansion board that plugs in to the Expansion Dock and provides direct access from the Omega1 to Arduinos and Arduino shields (see https://github.com/KitBishop/Omega-Arduino-Expansion)
I am probably going to have to redo this to incorporate some level shifters to accommodate the Omega2 3.3v only.
John, my logs were from the omega. I think our cases are similar, in that the client is deciding to disconnect a few seconds after it has successfully attached to the AP. I suspect this issue is going to involve wpa_supplicant in some way. Probably not an omega-specific problem. When I get some time I'll look into it in a bit more detail.
First I had to degrade my 2.4mhz wifi to 54mbs only and disable 20/40 MHz Coexistence, then reboot the router. You also might change your wifi channel to a static 6 or 9 to make sure your not on channel 13. Second, I had to RESET my onion using the dock (first reset didn't work, did it twice, worked second time), start the wizard and try to connect to your wifi network.
The wifi setup FAILED for me every time but when I ssh into the onion (http://192.168.3.1) wifisetup didn't work for me until the wizard failed the first time for some reason. Once the interface was up and I rebooted then it would grab an IP address on the wifi interface.
After I was able to ssh in and connect via wifi I manually did the oupgrade command to the latest p149 version. After that was successful, I then downloaded the latest p150 and scp'd the file to the onion and did a manual upgrade. After the final upgrade to p150 I was able to manually install the console.
My wifi, ethernet, console, and SD card are now all working correctly. The only thing left is connecting to the cloud. I'm able to register but the cloud shows my device as disconnected....
The problem with the serial is I am on el captain and it doesn't seem to work with it
I've had one of my onions play up on my desk, while the other 2 were fine with the office wifi.
A serial connection is the way to go and a tip is when you first connect on the COM port (make sure the baud speed is 115200) is to bash a couple of keys in the terminal until you see the message "press enter to start...", then hit enter and tada! Other wise it just stays as a blank screen
After that run "wifisetup" and follow the instructions.