Im working with MFRC522-Python library, I READ the RFid Uid then I open a webbrowser with a specific URL composed by the uid of each card. The thing is in Raspbian Buster (RPI 3b+) cannot run Chrome-Browser as SUDO from a python script. I would like to know if is there any way to read the RC522 without SUDO CODE: #!/usr/bin/python import signal import time import sys import os import webbrowser from pirc522 import RFID #chrome = chromium-browser() run = True rdr = RFID() util = rdr.util() util.debug = True def end_read(signal,frame): global run print("\nCtrl+C captured, ending read.") run = False rdr.cleanup() sys.exit() signal.signal(signal.SIGINT, end_read) print("Starting") os.system('chromium-browser --app=http://localhost/ --kiosk --user-data-dir /home/pi & ') while run: rdr.wait_for_tag() (error, data) = rdr.request() if not error: print("\nDetected: " + format(data, "02x")) (error, uid) = rdr.anticoll() if not error: print("Card read UID: "+str(uid[0])+","+str(uid[1])+","+str(uid[2])+","+str(uid[3])) print("Setting tag") util.set_tag(uid) os.system('chromium-browser --app=http://localhost/verperfil/rfid.php?rfid='+str(uid[0])+''+str(uid[1])+''+str(uid[2])+''+str(uid[3])+'') print("\nAuthorizing") #util.auth(rdr.auth_a, [0x12, 0x34, 0x56, 0x78, 0x96, 0x92]) #util.auth(rdr.auth_b, [0x74, 0x00, 0x52, 0x35, 0x00, 0xFF]) print("\nReading") util.read_out(4) print("\nDeauthorizing") util.deauth() time.sleep(1) THE OUTPUT WITHOUT SUDO: pi@raspberrypi:~ $ python /var/www/html/pi-rc522/examples/asigna.py Traceback (most recent call last): File "/var/www/html/pi-rc522/examples/asigna.py", line 11, in <module> rdr = RFID() File "build/bdist.linux-armv7l/egg/pirc522/rfid.py", line 78, in __init__ RuntimeError: No access to /dev/mem. Try running as root! pi@raspberrypi:~ $ THE OUTPUT WITH SUDO sudo python /var/www/html/pi-rc522/examples/asigna.py /usr/local/lib/python2.7/dist-packages/pi_rc522-2.2.1-py2.7.egg/pirc522/rfid.py:78: RuntimeWarning: This channel is already in use, continuing anyway. Use GPIO.setwarnings(False) to disable warnings. Starting --user-data-dir --disable-quic --enable-tcp-fast-open --ppapi-flash-path=/usr/lib/chromium-browser/libpepflashplayer.so --ppapi-flash-args=enable_stagevideo_auto=0 --ppapi-flash-version= No protocol specified [4692:4692:0807/011632.383841:ERROR:browser_main_loop.cc(596)] Failed to put Xlib into threaded mode. No protocol specified (chromium-browser-v7:4692): Gtk-WARNING **: 01:16:32.388: cannot open display: :10.0