I bought a APU2C4 Board (from the swiss company “PC Engines GmbH”) and multiple components because I want to build a custom pfSense router. I’ve ordered the device several weeks ago and haven’t used it until now. That’s because I made a few mistakes (which I want to write now): First Mistake: I used a power supply with 12V and 2A from china. Visible by: The LED on the back of the device blinks 5 times - then no more again.