Pfeiffer protocol - reading a PPT-100 vacuum gauge through a USB->RS485 adapter and python

pfeiffer_ppt-100.py

import serial
ser = serial.Serial('COM11', 9600, timeout=0.5) #open the rs485 adapter

while True:
    ser.write(('0010074002=?106\r').encode()) #request pressure from PPT-100, pfeiffer protocol
    result = ser.readline() #read pressure back, use timeout
    
    #return value is this:
    #adr ac prn ty value  chk  r
    #001 10 740 06 100023 025 \r
    #100023 is 1.000[*10^]3, with an offset of 20, e.g. 23 - 20 = 3, or 11-20 = -9
    
    print(result[10:11].decode("ascii") +"."+ result[11:14].decode("ascii") + "x10^" + str(int(result[14:16].decode("ascii"))-20) + "mbar")