Stripping Serial String Python












0















Is it possible to strip my string and pull out specify characters in python? My incoming data string is something like <STX>000000kg<ETX> I know I could do ser.read[X:X] but is there a better way of doing it? I have tried multiple methods.



My code:



import time

import serial

import I2C_LCD_driver

import re



mylcd = I2C_LCD_driver.lcd()



print ("Starting Program")

ser = serial.Serial("/dev/ttyUSB0", baudrate=9600,

                    parity=serial.PARITY_NONE,

                    stopbits=serial.STOPBITS_ONE,

                    bytesize=serial.EIGHTBITS

                    )

time.sleep(0.5)

try:

    ser.write("nRr".encode('utf-8'))

    print ("data echo mode enabled")

    while True:

        if ser.inWaiting() > 0:

            data = re.sub(b'[0-9]',"", ser.read())

            print ("Weight", data.decode())

            mylcd.lcd_display_string("Weight", 1)

            mylcd.lcd_display_string(data.decode(), 1,7)











except KeyboardInterrupt:

    print ("Exiting Program")



except:

    print ("Error Occurs, Exiting Program")



finally:

    ser.close()

    pass





python serial-port raspberry-pi3







share|improve this question





























    0















    Is it possible to strip my string and pull out specify characters in python? My incoming data string is something like <STX>000000kg<ETX> I know I could do ser.read[X:X] but is there a better way of doing it? I have tried multiple methods.



    My code:



    import time
    
import serial
    
import I2C_LCD_driver
    
import re
    

    
mylcd = I2C_LCD_driver.lcd()
    

    
print ("Starting Program")
    
ser = serial.Serial("/dev/ttyUSB0", baudrate=9600,
    
                    parity=serial.PARITY_NONE,
    
                    stopbits=serial.STOPBITS_ONE,
    
                    bytesize=serial.EIGHTBITS
    
                    )
    
time.sleep(0.5)
    
try:
    
    ser.write("nRr".encode('utf-8'))
    
    print ("data echo mode enabled")
    
    while True:
    
        if ser.inWaiting() > 0:
    
            data = re.sub(b'[0-9]',"", ser.read())
    
            print ("Weight", data.decode())
    
            mylcd.lcd_display_string("Weight", 1)
    
            mylcd.lcd_display_string(data.decode(), 1,7)
    

    

    

    

    

    
except KeyboardInterrupt:
    
    print ("Exiting Program")
    

    
except:
    
    print ("Error Occurs, Exiting Program")
    

    
finally:
    
    ser.close()
    
    pass





    python serial-port raspberry-pi3







    share|improve this question



























      0












      0








      0








      Is it possible to strip my string and pull out specify characters in python? My incoming data string is something like <STX>000000kg<ETX> I know I could do ser.read[X:X] but is there a better way of doing it? I have tried multiple methods.



      My code:



      import time
      
import serial
      
import I2C_LCD_driver
      
import re
      

      
mylcd = I2C_LCD_driver.lcd()
      

      
print ("Starting Program")
      
ser = serial.Serial("/dev/ttyUSB0", baudrate=9600,
      
                    parity=serial.PARITY_NONE,
      
                    stopbits=serial.STOPBITS_ONE,
      
                    bytesize=serial.EIGHTBITS
      
                    )
      
time.sleep(0.5)
      
try:
      
    ser.write("nRr".encode('utf-8'))
      
    print ("data echo mode enabled")
      
    while True:
      
        if ser.inWaiting() > 0:
      
            data = re.sub(b'[0-9]',"", ser.read())
      
            print ("Weight", data.decode())
      
            mylcd.lcd_display_string("Weight", 1)
      
            mylcd.lcd_display_string(data.decode(), 1,7)
      

      

      

      

      

      
except KeyboardInterrupt:
      
    print ("Exiting Program")
      

      
except:
      
    print ("Error Occurs, Exiting Program")
      

      
finally:
      
    ser.close()
      
    pass





      python serial-port raspberry-pi3







      share|improve this question
















      Is it possible to strip my string and pull out specify characters in python? My incoming data string is something like <STX>000000kg<ETX> I know I could do ser.read[X:X] but is there a better way of doing it? I have tried multiple methods.



      My code:



      import time
      
import serial
      
import I2C_LCD_driver
      
import re
      

      
mylcd = I2C_LCD_driver.lcd()
      

      
print ("Starting Program")
      
ser = serial.Serial("/dev/ttyUSB0", baudrate=9600,
      
                    parity=serial.PARITY_NONE,
      
                    stopbits=serial.STOPBITS_ONE,
      
                    bytesize=serial.EIGHTBITS
      
                    )
      
time.sleep(0.5)
      
try:
      
    ser.write("nRr".encode('utf-8'))
      
    print ("data echo mode enabled")
      
    while True:
      
        if ser.inWaiting() > 0:
      
            data = re.sub(b'[0-9]',"", ser.read())
      
            print ("Weight", data.decode())
      
            mylcd.lcd_display_string("Weight", 1)
      
            mylcd.lcd_display_string(data.decode(), 1,7)
      

      

      

      

      

      
except KeyboardInterrupt:
      
    print ("Exiting Program")
      

      
except:
      
    print ("Error Occurs, Exiting Program")
      

      
finally:
      
    ser.close()
      
    pass





      python serial-port raspberry-pi3




      python serial-port raspberry-pi3






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 26 '18 at 1:34









      Pang

      6,9091664102




      6,9091664102










      asked Nov 21 '18 at 19:49









      BradleyBradley

      247




      247
























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