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armbian orange pi: read matrix keypad 4x4 in python

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i used  this python script to read matrix 4x4 keypad data to raspberry pi 


import RPi.GPIO as GPIO  #raspberry pi
import time

# these GPIO pins are connected to the keypad  RPI
L1 = 21
L2 = 23
L3 = 27
L4 = 29

C1 = 31
C2 = 33  
C3 = 35
C4 = 37

# Initialize the GPIO pins

GPIO.setup(L1, GPIO.OUT)
GPIO.setup(L2, GPIO.OUT)
GPIO.setup(L3, GPIO.OUT)
GPIO.setup(L4, GPIO.OUT)

# Make sure to configure the input pins to use the internal pull-down resistors
GPIO.setup(C1, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
GPIO.setup(C2, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
GPIO.setup(C3, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
GPIO.setup(C4, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)

# It sends out a single pulse to one of the rows of the keypad
# and then checks each column for changes
# If it detects a change, the user pressed the button that connects the given line
# to the detected column

def readLine(line, characters):
    GPIO.output(line, GPIO.HIGH)
    if(GPIO.input(C1) == 1):
    if(GPIO.input(C2) == 1):

    if(GPIO.input(C3) == 1):

    if(GPIO.input(C4) == 1):

    GPIO.output(line, GPIO.LOW)

    while True:
        # call the readLine function for each row of the keypad
        readLine(L1, ["1","2","3","e"])
        readLine(L2, ["4","5","6","r"])
        readLine(L3, ["7","8","9","t"])
        readLine(L4, ["q","0","w","y"])
except KeyboardInterrupt:
    print("\nApplication stopped!")



How can i create similar script for orange pi in armbian (in my case orange pi pc plus)?

it can by python or other language  doesnt matter

Edited by ari1234
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  • ari1234 changed the title to armbian orange pi: read matrix keypad 4x4 in python

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