From Fig 1 I cannot understand where I should connect R2 to.
It should be connected one end to the Arduino's output pin and the other end to the FET. You have not done that in your practical layout. In that you have connected the Arduino output directly to the FET.
What you have marked as -55 is the ground, what you have marked as 22 in red is your 1 wire bus and what you have marked as 1wire bus + is your 5V line.