from serial import Serial
    from time import sleep
    
    dlp = Serial(port='/dev/ttyUSB0', baudrate=115200)  # open serial port

    dlp.write(b'QWERTYUI')  # sets all lines to '0'
    sleep(0.5)
    dlp.write(b'12345678')  # sets all lines to '1'
    sleep(0.5)
    dlp.write(b'QWERTYUI')  # sets all lines back to '0'

from serial import Serial
dlp = Serial(port='/dev/ttyUSB0', baudrate=115200)  # open serial port

dlp.write(b'QWERTYUI')  # set all lines to '0'
dlp.write(b'12345678')  # set all lines to '1'

ON1 = b'1'
ON2 = b'2'
ON3 = b'3'
ON4 = b'4'
dlp.write(ON1 + ON2 + ON3 + ON4)

OFF1 = b'Q'
OFF2 = b'W'
OFF3 = b'E'
OFF4 = b'R'
dlp.write(OFF1 + OFF2 + OFF3 + OFF4)

   import time
   import serial

   dlp = serial.Serial(port='/dev/ttyUSB0', baudrate=115200)  # open serial port
   print(dlp.name)         # check which port was really used
   dlp.write(b'`')  # switch to ascii mode

   start = time.perf_counter()
   previous_state = '2'

   while True:
      dlp.write(b'A')  # request to read line 1
      state = dlp.read(3).decode('utf-8')
      if state[0] != previous_state[0]:
          print(time.perf_counter() - start, state[0])
          previous_state = state

  #! /usr/bin/env python3

   """ Generate a square wave on pin1 of DLP-IO8-G """

   from time import perf_counter 
   from serial import Serial

   dlp = Serial(port='/dev/ttyUSB0', baudrate=115200)  # open serial port
   # byte codes to control line 1:
   ON1 = b'1'
   OFF1 = b'Q'

   # number of periods
   NPERIODS = 1000

   # Timing of the square wave
   TIME_HIGH = 0.010   # 10ms pulse
   TIME_LOW = 0.090    # send every 100ms
   PERIOD = TIME_HIGH + TIME_LOW

   onset_times = [ (PERIOD * i) for i in range(NPERIODS) ]

   i = 0
   while i < NPERIODS:
       if i == 0:
           t0 = perf_counter()

       # wait until the start of the next period
       while perf_counter() - t0 < onset_times[i]:
           None
           
       dlp.write(ON1)
       
       # busy wait for 'TIME_HIGH' seconds. This should be more accurate than time.sleep(TIME_HIGH)
       t1 = perf_counter()
       while perf_counter() - t1 < (TIME_HIGH):
           None
           
       dlp.write(OFF1)
       i = i + 1
       print(f"\r{i:4d}", end='')

   time.sleep(TIME_LOW)
   print()
   print(f'{NPERIODS} periods of {PERIOD} seconds')
   print('Total time-elapsed: ' + str(perf_counter() -t0))
   dlp.close()         # close the port