¿Cómo controlar la bomba L100-1S-2 deLonger mediante Python?

				
					### RUN PUMP 1 COUNTER-CLOCKWISE AT A FLOW RATE OF 5 mL/min FOR 10s, THEN CLOCKWISE AT A FLOW RATE OF 3 mL/min FOR 30s BEFORE STOPPING IT
# To use the pySerial package
import serial
# To use the time package
import time

# Open the serial port with tha data format corresponding to the L100-1S-2
# The parameters in the command need to be the same as the communication parameters set for the pump
ser = serial.Serial('COM3', 9600, parity=serial.PARITY_NONE, bytesize=8, stopbits=1, timeout=None, xonxoff=0, rtscts=0)
# Run pump 1 counter-clockwise at a flow rate of 5 mL/min for 10s
Data = bytearray(b'\xE9\x01\x08\x57\x4C\x00\x4C\x4B\x40\x01\x01\x55') # corresponding control command string in hexadecimal
ser.write(Data) # Write the Data to the pump

# 10s delay with a visible timer
for Pumping_time in range(10, 0, -1):
    print(Pumping_time)
    time.sleep(1)

# Run pump 1 clockwise at a flow rate of 3 mL/min for 30s
Data = bytearray(b'\xE9\x01\x08\x57\x4C\x00\x2D\xC6\xC0\x01\x00\x38') # corresponding control command string in hexadecimal
ser.write(Data) # Write the Data to the pump

# 30s delay with a visible timer
for Pumping_time in range(30, 0, -1):
    print(Pumping_time)
    time.sleep(1)

# Stop the pump
Data = bytearray(b'\xE9\x01\x08\x57\x4C\x00\x2D\xC6\xC0\x00\x00\x39') # corresponding control command string in hexadecimal: we took the previous command string and changed the 'State 1' byte from 01 (start the pump) to 00 (stop the pump) and of course computed the new fcs
ser.write(Data) # Write the Data to the pump