Nerdish link collection and deep dive for NFC builders ⚡️
While the simple LNURLw voucher work with nearly every wallet out there
not all wallets support the boltcard service yet
Github of the Boltcard LNbits extension https://github.com/lnbits/boltcards
Support groups
BoltCard https://t.me/bolt_card
LNbits https://t.me/lnbits
Building Gadgets with NFC
- MakerBits https://t.me/makerbits
Writing with other tools (very advanced)
Building with NFC
IMPORTANT
SPI is generally more reliable than I2C for NTAG424 implementations on an ESP32. This is because the NTAG424 chip uses a proprietary 1-Wire communication protocol that can be implemented using either I2C or SPI, but I2C can sometimes be less reliable due to issues with bus contention and clock stretching.
The story behind the HCCP Badge
https://github.com/taxmeifyoucan/HCPP2021-Badge