Arduino大师练成手册 -- 控制 AS608 指纹识别模块

要在 Arduino 上控制 AS608 指纹识别模块，你可以按照以下步骤进行：

硬件连接

连接指纹模块：将 AS608 指纹模块与 Arduino 连接。通常，AS608 使用 UART 接口进行通信。你需要将 AS608 的 TX、RX、VCC 和 GND 引脚分别连接到 Arduino 的相应引脚。

软件设置

安装必要的库：
- 安装 Adafruit Fingerprint Sensor Library：
  
  打开 Arduino IDE，进入库管理器（Library Manager），搜索 “Adafruit Fingerprint Sensor Library”，然后点击安装。

编写代码

编写 Arduino 代码：

导入必要的库：

#include <Adafruit_Fingerprint.h>
#include <SoftwareSerial.h>

SoftwareSerial mySerial(2, 3); // RX, TX
Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);

void setup() {
  Serial.begin(9600);
  while (!Serial);  // For Leonardo/Micro/Zero
  delay(100);
  Serial.println("\n\nAdafruit Fingerprint sensor enrollment");

  // set the data rate for the sensor serial port
  finger.begin(57600);
  if (finger.verifyPassword()) {
    Serial.println("Found fingerprint sensor!");
  } else {
    Serial.println("Did not find fingerprint sensor :(");
    while (1) { delay(1); }
  }
}

void loop() {
  // Add your code here to enroll, delete, or search fingerprints
}

录入指纹：

uint8_t getFingerprintEnroll(uint8_t id) {
  int p = -1;
  Serial.print("Waiting for valid finger to enroll as #"); Serial.println(id);
  while (p != FINGERPRINT_OK) {
    p = finger.getImage();
    switch (p) {
      case FINGERPRINT_OK:
        Serial.println("Image taken");
        break;
      case FINGERPRINT_NOFINGER:
        Serial.println(".");
        break;
      case FINGERPRINT_PACKETRECIEVEERR:
        Serial.println("Communication error");
        break;
      case FINGERPRINT_IMAGEFAIL:
        Serial.println("Imaging error");
        break;
      default:
        Serial.println("Unknown error");
        break;
    }
  }

  // Convert image to template
  p = finger.image2Tz(1);
  switch (p) {
    case FINGERPRINT_OK:
      Serial.println("Image converted");
      break;
    case FINGERPRINT_IMAGEMESS:
      Serial.println("Image too messy");
      return p;
    case FINGERPRINT_PACKETRECIEVEERR:
      Serial.println("Communication error");
      return p;
    case FINGERPRINT_FEATUREFAIL:
      Serial.println("Could not find fingerprint features");
      return p;
    case FINGERPRINT_INVALIDIMAGE:
      Serial.println("Could not find fingerprint features");
      return p;
    default:
      Serial.println("Unknown error");
      return p;
  }

  // Store template
  p = finger.createModel();
  if (p == FINGERPRINT_OK) {
    Serial.println("Prints matched!");
  } else if (p == FINGERPRINT_PACKETRECIEVEERR) {
    Serial.println("Communication error");
    return p;
  } else if (p == FINGERPRINT_ENROLLMISMATCH) {
    Serial.println("Fingerprints did not match");
    return p;
  } else {
    Serial.println("Unknown error");
    return p;
  }

  p = finger.storeModel(id);
  if (p == FINGERPRINT_OK) {
    Serial.println("Stored!");
  } else if (p == FINGERPRINT_PACKETRECIEVEERR) {
    Serial.println("Communication error");
    return p;
  } else if (p == FINGERPRINT_BADLOCATION) {
    Serial.println("Could not store in that location");
    return p;
  } else if (p == FINGERPRINT_FLASHERR) {
    Serial.println("Error writing to flash");
    return p;
  } else {
    Serial.println("Unknown error");
    return p;
  }

  return true;
}

删除指纹：

void deleteFingerprint(uint8_t id) {
  if (finger.deleteModel(id) == FINGERPRINT_OK) {
    Serial.println("Deleted!");
  } else {
    Serial.println("Could not delete");
  }
}

查找指纹：

void searchFingerprint() {
  uint8_t p = finger.getImage();
  if (p != FINGERPRINT_OK) return;

  p = finger.image2Tz();
  if (p != FINGERPRINT_OK) return;

  p = finger.fingerFastSearch();
  if (p == FINGERPRINT_OK) {
    Serial.print("Found ID #"); Serial.print(finger.fingerID);
    Serial.print(" with confidence of "); Serial.println(finger.confidence);
  } else {
    Serial.println("Did not find a match");
  }
}