Feb-17-2019, 08:46 AM
Hi all
I am novice at python.
I have to scripts - one reads the barcode of a box and the other takes the weight of the box.
Barcode:
I am trying to combine them together so they can accept the barcode from the scanner and the weight from the scale.
When I run them individually, they close after each run.
I need this to stay open and constantly looking for these inputs but I am not sure how to do this.
This will run on a raspberry pi and will ideally be headless.
Am I on the right path?
Any help would be greatly appreciated.
BMC
I am novice at python.
I have to scripts - one reads the barcode of a box and the other takes the weight of the box.
Barcode:
#!/usr/bin/ python from evdev import InputDevice, ecodes, list_devices from select import select keys = { # Scancode: ASCIICode 0: None, 1: u'ESC', 2: u'1', 3: u'2', 4: u'3', 5: u'4', 6: u'5', 7: u'6', 8: u'7', 9: u'8', 10: u'9', 11: u'0', 12: u'-', 13: u'=', 14: u'BKSP', 15: u'TAB', 16: u'Q', 17: u'W', 18: u'E', 19: u'R', 20: u'T', 21: u'Y', 22: u'U', 23: u'I', 24: u'O', 25: u'P', 26: u'[', 27: u']', 28: u'CRLF', 29: u'LCTRL', 30: u'A', 31: u'S', 32: u'D', 33: u'F', 34: u'G', 35: u'H', 36: u'J', 37: u'K', 38: u'L', 39: u';', 40: u'"', 41: u'`', 42: u'LSHFT', 43: u'\\', 44: u'Z', 45: u'X', 46: u'C', 47: u'V', 48: u'B', 49: u'N', 50: u'M', 51: u',', 52: u'.', 53: u'/', 54: u'RSHFT', 56: u'LALT', 100: u'RALT' } dev = InputDevice("/dev/input/event3") barcode = "" while True: r,w,x = select([dev], [], []) for event in dev.read(): if event.type == 1 and event.value == 1: barcode += (keys[event.code]) if (len (barcode)) > 13: break; with open('outputbarcode.txt', 'a+') as myfile: myfile.write(barcode) print (barcode)Scale:
#!/usr/bin/ python import time import serial ser = serial.Serial( port='/dev/ttyUSB0', baudrate = 9600, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, bytesize=serial.EIGHTBITS, timeout=None ) while 1: x=ser.readline().decode('utf-8') with open('outputbarcode.txt', 'a+') as myfile: myfile.write(x) print(x)The both output to my txt file.
I am trying to combine them together so they can accept the barcode from the scanner and the weight from the scale.
When I run them individually, they close after each run.
I need this to stay open and constantly looking for these inputs but I am not sure how to do this.
This will run on a raspberry pi and will ideally be headless.
Am I on the right path?
Any help would be greatly appreciated.
BMC