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I have an Onion Omega 2 which I haven't used for a year or more and would like to use for an IoT project.

I have attached it to the Expansion Dock, and connected it to my laptop with a USB cable.

Four white LEDs flicker constantly, but I don't see the Omega on my laptop's list of WiFi devices. Nor can I discover it with Bonjour.

Having looked through the troubleshooting docs, I decided to follow the instructions at

https://docs.onion.io/omega2-docs/connecting-to-the-omega-terminal.html#connecting-to-ssh-windows

However, when I try to use Putty to connect to omega-ABCD.local where ABCD are the last digits of the Omega's MAC address, using port 22, Putty says that it can't connect because the "Host does not exist".

Any ideas how I can connect?

Mawg
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1 Answers1

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With a malfunctioning system, you want to connect in a way that does not depend on networking. MT7688 systems including the Onion Omega have logic-level serial consoles.

The "Expansion Dock" should already have a USB serial function on it, if not you'll need to get a 3.3v logic level USB serial converter.

You'll have to see the onion docs to determine which pins have the serial interface and what the baud rate is, if I recall it is on a different port than is typical for MT7688's (though that's only relevant after looking up the physical module pinout) and may be 57600 baud vs the 115200 used by most other MT7688 systems. If using the USB serial on the dock, you should only need to worry about the baud rate.

There is also a button-based mechanism for doing a factory reset, though that would not work in the case of corruption of the flash partitions that user operations do not normally touch, such as might result from an incomplete firmware update.

Generally speaking you'd do better pursuing this on the Onion community site. While the company itself has a rather poor record (see the many issues documented on that site), there is a fair amount of community support there.

Chris Stratton
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