It works when i use a wall wart 5V psu for the uno and a 18650 lithium battery for the motor. It also works when i use two separate 18650 litlium batteries for the uno and motor. The uno norlammy needs 4.5Volts or more but it can work with 4.2 as well.
I will take pictures and post them later.
The schematic in #1 is correct isn't it ?