WP Easy Events WordPress Plugin allows event ticket processing using EMD QR Code Extension. After activating the plugin, QR code is displayed in the attendee tickets.
QR codes can be scanned by an device having QR code reader app. QR code reader apps are freely available in app stores.
EMD QR Code Extension can be purchased at:
https://emdplugins.com/plugins/emd-qr-code-extension/