import time
import ndef
import nfc
from nfc.clf import RemoteTarget

clf = nfc.ContactlessFrontend()
connected=False
while True:
    try:
        if not connected:
            connected=clf.open('tty:USB0:pn532')
        if connected:
            target = clf.sense(RemoteTarget('106A'), RemoteTarget('106B'), RemoteTarget('212F'))
            if target is not None:
                tag = nfc.tag.activate(clf, target)
                if tag is not None:
                    print(tag)
                    if tag.ndef is not None:
                        if not len(tag.ndef.records):
                            print("EMPTY TAG - WRITING...")
                            if not tag.ndef.is_writeable:
                                print("This Tag is not writeable.")
                                break
                            else:
                                tag.format()
                                #tag.ndef.records = [ndef.TextRecord("Errecinque"),ndef.TextRecord("5812345678")]
                                record=ndef.TextRecord("Errecinque,fixture,5812345678")
                                tag.ndef.records = [record]
                                if tag.ndef.has_changed:
                                    print("WRITE ERROR")
                                else:
                                    print("WRITE OK")

                        for record in tag.ndef.records:
                            print(record)
                    else:
                        print("ERROR NOT NDEF")
            else:
                print("NO TARGET")
    except Exception as e:
            print(f"EXCEPTION {e}")
            connected=False
    time.sleep(0.3)

print("EXITING")
clf.close()