![]() ![]() It seems to be a hardware issue or you need support to program your project? Please ask in the official Arduino forum, where you would get a much faster answer than on Github.First checkout what works and not and troubleshooting.Note that the main target/support of library is still Arduino. ESP8266 (native): miguelbalboa/rfid#235.Some user made some patches/suggestions/ports for other boards: Not all examples are available for every board. ![]() This library is compatible with the Teensy and ESP8266 if you use the board plugin of the Arduino IDE. If you use your own compiler, you have to enable c++11-support. The built-in library manager is supported. This library works with Arduino IDE 1.6, older versions are not supported and will cause compiler errors. If hardware: buy a more expensive like PN532 (supports NFC and many more, but costs about $15 and not usable with this library).If software: code it and make a pull request.UART instead of SPI #281, not supported by software.Power reduction modes #269, not supported by software.With Intel Galileo (Gen2) see #310, not supported by software.Card emulation, not supported by hardware.Communication with smart phone, not supported by hardware.Peer-to-peer (ISO/IEC 18092), not supported by hardware.Communication with 3DES or AES, not supported by software.MIFARE DESFire, MIFARE DESFire EV1/EV2, not supported by software.More than 2 modules, require a multiplexer #191.Manage the SPI chip select pin (aka SS, SDA).Set the UID, write to sector 0, and unbrick Chinese UID changeable MIFARE cards.Communication (Crypto1) with MIFARE Classic compatible PICCs.Communication (Crypto1) with MIFARE Classic (1k, 4k, Mini). #Sketch 53.2 smart guides not working how toIf you got a bad board and you can tell us how to detect those boards (silk, chip description. So the chance of getting a working device is higher. Please consider buying several devices from different suppliers. Some are soldered with wrong/low quality capacitors or fake/defect mfrc522. The quality of these boards are extremely different. Please notice that there are many sellers (ebay, aliexpress. Maintenance status: sporadically Before buy
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