Update: V3

Merged Input pin group and Output pin group to one!
This will reduce the number of I/O 6-pin header from 8 to 4.
Why didn't I thought of this???
It's so nice, isn't it.

Update: V2

Added another schottky diode to fix the data corruption issue.

V1 complete

I've done the test with this setup.
I can say it's V1.