This is the 6th generation of the ArOZ Online Main board and something screwed up again. If you are curious which part of the PCB is screwed up, it is the power delivery of the 1st USB port and the FE1.1S ground pin.

I have tracked down the issue to these parts.

1. The power delivery trace to the 1st USB port is too thin. 5V power delivery to that port is not enough to drive the age old USB2.0 thumb drive (

2. I forgot to draw the ground pin to the FE1.1S :((

That is definitely my fault :((((((((((
Anyway, in the new version, I give the USB Hub external pins for connecting it externally.
I guess if I continues to screw up this mother board, this will cost me too much money to develop.
I better ask someone (or buy someone's USB hub module) and solider it to the adapter board instead.

If you wonder how the latest board looks like, this is it.

Any help over the design of the USB Hub chips / PCB will be nice (And, I can offer you a free ArOZ Online board + Onboard Cloud OS if you can help with the design :)) )