Something

loadusr -W arduino /dev/ttyUSB0
loadusr -Wn arduino-vcp pyvcp arduino-vcp.xml

loadrt threads name1=servo-thread period1=100000
loadrt scale count=1

show pin arduino-vcp

# may have to add functions to threads at some stage
addf scale.0 servo-thread

setp scale.0.gain 10.0
setp scale.0.offset 1.0
net n1_1 scale.0.in arduino.analog-in-04 

net ain0 arduino.analog-in-00 => arduino-vcp.analog-in-00 arduino-vcp.analog-in-00b
net ain1 arduino.analog-in-01 => arduino-vcp.analog-in-01 arduino-vcp.analog-in-01b
net ain2 arduino.analog-in-02 => arduino-vcp.analog-in-02 arduino-vcp.analog-in-02b
net ain3 arduino.analog-in-03 => arduino-vcp.analog-in-03 arduino-vcp.analog-in-03b
net ain4 scale.0.out => arduino-vcp.analog-in-04 arduino-vcp.analog-in-04b

waitusr arduino-vcp