# Program description
    #   hx711test02a.py tlfong01 2020oct27hkt2109
    # System Config
    #   Rpi4B 2GB Thonny python 3.7.3
    # HX711 PyPi Library Install
    #   pi@raspberrypi:~ $ date Tue 27 Oct 2020 09:14:01 PM HKT
    #   pi@raspberrypi:~ $ pip3 install hx711 
    #   Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
    #   Requirement already satisfied: hx711 in ./.local/lib/python3.7/site-packages (1.1.2.3)
    
    # *** Imports *** 
    import RPi.GPIO as GPIO
    from   datetime import datetime
    from   hx711    import HX711
    
    # *** System Setup ***
    print('Program hx711test02.py', 'tlfong01', str(datetime.now())[0:16])
    print('Program Begins, ...   ', 'tlfong01', str(datetime.now())[0:16]) # *** Debug print ***
    
    # *** GPIO setup)
    print('  Setting up  GPIO, ...')
    GPIO.setmode(GPIO.BCM)
    GPIO.setwarnings(False)
    GPIO.cleanup()
    
    # *** Create object hx711 module number01 ***
    hx711m01 = HX711(dout_pin   = 15, # *** Originally pin 5, now pin 15 (RxD)
                     pd_sck_pin = 14, # *** Originally pin 6, now pin 14 (TxD)
                     channel    = 'A',
                     gain       = 64
                    )
    
    # *** Reset module ***
    print('  Resetting hx711 module, ...')
    hx711m01.reset()
    
    # *** Get raw results ***
    # raw_results = hex77m01.get_raw_data(num_measures = 3)
    
    # *** Cleaning up GPIO ***
    print('  Cleaning up GPIO, ...')
    GPIO.cleanup()
    
    print('Program Ends.         ', 'tlfong01', str(datetime.now())[0:16]) # *** Debug print ***
    
    # *** End of program ***
    
    ''' Sample output
    >>> %Run hx777_test_02a.py
    Program hx711test02.py tlfong01 2020-10-27 22:27
    Program Begins, ...    tlfong01 2020-10-27 22:27
      Setting up  GPIO, ...
      Resetting hx711 module, ...
      Cleaning up GPIO, ...
    Program Ends.          tlfong01 2020-10-27 22:28
    >>>
    '''