• Ok, all I can think is that maybe we're causing problems by changing the NFC URL while the NFC connection is active. Maybe try:

    var nfcOn = false;
    NRF.on('NFCon', () => { nfcOn = true; });
    NRF.on('NFCoff', () => { nfcOn = false; });
    setInterval(() => {
      if (nfcOn) return; // don't change if NFC on
      var currentTime = new Date();
      NRF.nfcURL('http://192.168.1.154/student­system/details.php?time=' + currentTime.toISOString().substr(0, 16));
    }, 60000); // once a minute
    
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