@Ger-Buurman-0 OK. Probably you have some mobile device charger: Output:5.0V (= or DC) 0.5A (or 500mA) - more A (Amper) / mA (milliAmper) would be even better and it has micro USB plug. Plug it to the Micro USB Port of the Expansion Dock and switch on the Power Switch of the Dock.
After 2-3 minutes (the amber LED is not OFF / not dark - it is constantly ON / lit / illuminated) you should find a WiFi AP with SSID Omega-ABCD (ABCD is the last four characters on your Omega's sticker). Try to connect - password: 12345678
I am also having trouble connecting to my bricked Omega using serial. I bought a CP2012 breakout, tried using a long USB cable, etc. When I run "screen /dev/tty.SLAB_USBtoUART 115200" I get the same quick 2 error messages about Resources and PTY. I tried running "lsof" and "kill" the process, can't seem to connect. Any ideas? I am using the Power Dock, with the GND connected and the Rx-to-Tx, Tx-to-Rx from the 2102. I am completely stuck, any help would be greatly appreciated.