matekasse_NFC-Reader/NFC_Reader.py

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import time
import nfc
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import subprocess
import requests
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import oled
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from multiprocessing import Process
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url="http://172.16.1.105/api/"
def get_reader():
devices = subprocess.check_output("lsusb")
for i in devices.split(b'\n'):
if str(i).__contains__("Advanced Card Systems, Ltd ACR122U"):
bus = str(i).split(":")[0].split(" Device ")[0].split("Bus ")[1]
device = str(i).split(":")[0].split("Device ")[1]
return("usb:{}:{}".format(bus, device))
raise Exception("\n\n Error: NFC reader not found")
def onTagSense(tag):
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id = int.from_bytes(tag.identifier, "big")
response = requests.post(f"{url}tag_id", data={"id":id})
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try:
if response.json()["mode"] == "balance" or response.json()["mode"] == "message":
#oled.balance(response.json()["username"], response.json()["balance"])
return True
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except:
None
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return False
def start_nfc_normal():
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device = get_reader()
clf = nfc.ContactlessFrontend(device)
clf.open(device)
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while True:
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if clf.connect(rdwr={'on-connect': onTagSense, 'beep-on-connect': True }) == False:
raise Exception("NFC Reader failed")
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time.sleep(0.75)
if __name__ == "__main__":
start_nfc_normal()