Arduino + RFID 读取 IC 卡 Arduino uno中获得RFID的UID 并通过串口转发RFID卡号 |
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Arduino + RFID 读取 IC 卡 Arduino uno中获得RFID的UID 并通过串口转发RFID卡号
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RFID简介：射频识别即RFID（Radio Frequency IDentification）技术，又称无线射频识别，是一种通信技术，可通过无线电讯号识别特定目标并读写相关数据，而无需识别系统与特定目标之间建立机械或光学接触。常用的有低频（125k~134.2K）、高频（13.56Mhz）、超高频，微波等技术。RFID读写器也分移动式的和固定式的，目前RFID技术应用很广，如：图书馆，门禁系统，食品安全溯源等。 硬件准备（基于Arduino的开发板、MFRC522读卡器模块）
Arduino Uno * 1
Arduino Uno RFID-RC522 10 SDA 13 SCK 11 MOSI 12 MISO null IRQ GND GND 9 RST 3.3V 3.3V 需要用到RFID-RC522的库法一、下载：https://github.com/miguelbalboa/rfid 下载解压到Arduino IDE的安装路径里的库文件夹libraries https://download.csdn.net/download/v86337286/11813061 法二、点开管理库，在搜索栏里输入RC522，找到图中的库，
Arduino + RFID 读取 IC 卡信息 读取 IC 卡信息后并通过串口将卡号及0扇区卡号数据打印出来，其他15个扇区不显示扇区内容 代码如下 /* * -------------------------------------------------------------------------------------------------------------------- * Example sketch/program showing how to read data from a PICC to serial. * -------------------------------------------------------------------------------------------------------------------- * This is a MFRC522 library example; for further details and other examples see: https://github.com/miguelbalboa/rfid * * Example sketch/program showing how to read data from a PICC (that is: a RFID Tag or Card) using a MFRC522 based RFID * Reader on the Arduino SPI interface. * * When the Arduino and the MFRC522 module are connected (see the pin layout below), load this sketch into Arduino IDE * then verify/compile and upload it. To see the output: use Tools, Serial Monitor of the IDE (hit Ctrl+Shft+M). When * you present a PICC (that is: a RFID Tag or Card) at reading distance of the MFRC522 Reader/PCD, the serial output * will show the ID/UID, type and any data blocks it can read. Note: you may see "Timeout in communication" messages * when removing the PICC from reading distance too early. * * If your reader supports it, this sketch/program will read all the PICCs presented (that is: multiple tag reading). * So if you stack two or more PICCs on top of each other and present them to the reader, it will first output all * details of the first and then the next PICC. Note that this may take some time as all data blocks are dumped, so * keep the PICCs at reading distance until complete. * * @license Released into the public domain. * * Typical pin layout used: * ----------------------------------------------------------------------------------------- * MFRC522 Arduino Arduino Arduino Arduino Arduino * Reader/PCD Uno/101 Mega Nano v3 Leonardo/Micro Pro Micro * Signal Pin Pin Pin Pin Pin Pin * ----------------------------------------------------------------------------------------- * RST/Reset RST 9 5 D9 RESET/ICSP-5 RST * SPI SS SDA(SS) 10 53 D10 10 10 * SPI MOSI MOSI 11 / ICSP-4 51 D11 ICSP-4 16 * SPI MISO MISO 12 / ICSP-1 50 D12 ICSP-1 14 * SPI SCK SCK 13 / ICSP-3 52 D13 ICSP-3 15 */ #include #include #define RST_PIN 9 // Configurable, see typical pin layout above #define SS_PIN 10 // Configurable, see typical pin layout above MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance void setup() { Serial.begin(9600); // Initialize serial communications with the PC while (!Serial); // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4) SPI.begin(); // Init SPI bus mfrc522.PCD_Init(); // Init MFRC522 mfrc522.PCD_DumpVersionToSerial(); // Show details of PCD - MFRC522 Card Reader details Serial.println(F("Scan PICC to see UID, SAK, type, and data blocks...")); } void loop() { // Look for new cards if ( ! mfrc522.PICC_IsNewCardPresent()) { return; } // Select one of the cards if ( ! mfrc522.PICC_ReadCardSerial()) { return; } // Dump debug info about the card; PICC_HaltA() is automatically called mfrc522.PICC_DumpToSerial(&(mfrc522.uid)); }运行此代码并将其中一张卡放入RFID卡时，很多信息显示在Arduino IDE的串行监视器上
Arduino uno中只获得RFID的UID 并通过串口转发 法一 创建了另一个函数： PICC_DumpDetailsToSerialUid(Uid *uid) 函数如下//This is just for read UID! void MFRC522::PICC_DumpDetailsToSerialUid(Uid *uid){ Serial.print(F(“Card JUST UID :”)); for (byte i = 0; i < uid->size; i++) { if(uid->uidByte[i] < 0x10) Serial.print(F(" 0")); else Serial.print(F(" ")); Serial.print(uid->uidByte[i], HEX); } Serial.println(); } 可以把它放在你需要的任何地方
示例：
void PICC_DumpDetailsToSerialUid(Uid *uid); 在该库中进行了这两次编辑后，您可以在任意位置调用该函数 .
示例：
法二 返回UID的函数 . /** * mfrc522.PICC_IsNewCardPresent() should be checked before * @return the card UID */ unsigned long getID(){ if ( ! mfrc522.PICC_ReadCardSerial()) { //Since a PICC placed get Serial and continue return -1; } unsigned long hex_num; hex_num = mfrc522.uid.uidByte[0] |
RFID-RC522 模块 * 1
IC卡 * 1-2
RFID技术现在都非常成熟和应用广泛，今天我们就来看看这个RFID如何实现读取里面的数据
点击安装（我这图是已经安装过）
添加该功能后，您需要进入第410行的 MFRC522.h 库并添加
用Arduino调用它： mfrc522.PICC_DumpDetailsToSerialUid(&(mfrc522.uid)); 只仅且只有一个函数用于uid读取
效果
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