Searching…
2025年11月24日 · Hello! I'm trying to build a prototype with: 3 MFRC522 RFID readers (SPI protocol) ESP32 microcontroller external power supply for the RFID readers only The result is very …
2025年5月15日 · Those RFID modules use a MFRC522 controller, which is a 3.3V device. It is not 5V tolerant. Your Uno is a 5V device and hence outputs 5V level signals. You need to do level shifting on …
2024年4月13日 · New replies are no longer allowed. Topic Replies Views Activity Arduino UNO & RFID-RC522 - Communication Failure General Guidance 8 350 November 12, 2025 RC522 RFID Module …
2021年8月4日 · The example code provided in GitHub - miguelbalboa/rfid: Arduino RFID Library for MFRC522 does not provide a clear idea about what is in the header files. Since RC522 uses 13.5 …
2023年3月10日 · The MFRC522 identifies the host interface by sensing the logic levels on the control pins after the reset phase. This is done using a combination of fixed pin connections
2016年9月25日 · Copy the "RFID library" folder, paste it into the "libraries" folder in your sketchbook, then rename it to "RFID" or "MFRC522". Copy the sketch file to another location - the Desktop will do …
2023年4月4日 · Hi, I ordered Ntag215 from Aliexpress. The tags are identified just fine, yet I have issues writing/reading to them because of failed authentication. I am using Arduino Uno + RFID-RC522 …
2013年11月19日 · I just bought this: SainSmart Mifare RC522 Card Read Antenna RF RFID Reader IC Card Proximity Module – SainSmart.com ..and I was wondering if there's any way to add an external …
2023年2月28日 · Hi Forum! I am new here and also new to ESP32. I wanted to connect RFID-reader RC522 to the ESP32-S3 board. Can someone tell me what to connect to what? Thnx!
2021年5月16日 · As far as I know the MFRC522 operates at 13.56MHz. MFRC522 datasheet That bank of capacitors C6,C7,C8,C9,C10, C11 is used to form a resonant circuit with the 4 turn coil that you …
