NFC payments for the bliksembier beertap firmware work quite good. What you see is an ESP32 with a PN532 NFC reader. The card is a boltcard (NTAG424). Bitcoin, Lightning, LNbits rock! https://nostr.build/av/e5314939b6d9840715ea09aee8b502c24b47c23c958e763f72bb3774ba2a1c9b.mov