I won't write much in detail, but a memo
For those who want to read NFC in Python
I was in trouble because the ʻon-connectfunction was executed all the time the NFC was in contact. It's not good to putSleep`, and the solution memo that I got by wandering the sea of the net
import nfc
def on_connect(tag):
print(tag)
def on_release(tag):
print("[*] released:")
def main():
try:
with nfc.ContactlessFrontend('usb') as clf:
while clf.connect(rdwr={
'on-connect': on_connect,
'on-release': on_release,
}):
pass
except IOError:
print("NFC reader connection Error")
sys.exit(0)
if __name__ == '__main__':
main()
This will execute ʻon_connect () only once when the reader and NFC contact, and execute ʻon_release () when they are released.
I saw an infinite number of people who were in trouble if only ʻon-releasewas not executed, or if they didn't entersleep` and kept being called.
I would be happy if I could rescue such a person
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