IIRC, the power dock doesn't supply coms over the USB port. [edit] From the documentation: Onion Omega2 Documentation No USB-to-Serial There is no USB-to-Serial Chip on the Dock. This means that you will not be able to connect to the Omega serially over the Micro-USB port. You can still connect to your Omega’s terminal with SSH, you can learn how to do that in this guide to connecting to the Omega. [/edit]