0基础手把手教你弄寝室指纹识别开门装置（arduino uno,as608）

就是闲的没事，看见某超级大佬也弄了一个，觉得挺好，然后自己也实践实践。

总共，大概花了一周时间吧。
自己

查考博客：
https://blog.csdn.net/woshi_ziyu/article/details/88200664
https://blog.csdn.net/m0_54003252/article/details/114542500我也是参考这篇博客采购的

自己用的零件: uno板子,线公对公、母对母尽量多，充电宝（寝室停电使用要一个9V供电的（不过5V好像也够）），面包板，as608，SG90S舵机，一根强度比较高的线（通过舵机拉门用），LCD1602显示屏焊好的。

成本大概150左右，不要充电宝就110。

首先需要知道怎么接线，我花2-3天看的这个b站视频，第一部分看一大半就知道怎么接了：链接

然后东西到了开始接线。

指纹模
Vi 3.3V
Tx 2管脚
Rx 3管脚
GND GND

SG90舵机
VCC(红色线) 5V
I/O（橙色线） 8管脚
GND（黑色线） GND
舵机注意方向！！当时门把手没拉动我还以为力不够！结果是初始位置搞错了，导致先回到初始位置才开始旋转。

这个是lcd的使用方法：
https://blog.csdn.net/acktomas/article/details/88136405
lcd参考上面那个博客接线！
注意lcd 先找地址！具体可以上面的博客

需要安装的库
指纹库 fingerprint github下载地址：链接

LCD库 LiquidCrystal_I2C github下载地址：链接

下载后2个文件后，将文件放进arduino的libraries（我用的苹果m1，windons其他博客应该会写。）进入方法找到arduino图标右键->contents->Java->libraries

指纹库 fingerprint 的文件还要放进arduino图标右键->contents->Java->examples里。

然后打开ardiuno。
接下来参考视频：https://www.bilibili.com/video/BV1tb411a7by?t=45参考他怎么烧录和操作的。

下面代码：大部分我自己改成中文了，这样看的时候方便。

烧录指纹代码：

/***************************************************
  This is an example sketch for our optical Fingerprint sensor

  Designed specifically to work with the Adafruit BMP085 Breakout
  ----> http://www.adafruit.com/products/751

  These displays use TTL Serial to communicate, 2 pins are required to
  interface
  Adafruit invests time and resources providing this open source code,
  please support Adafruit and open-source hardware by purchasing
  products from Adafruit!

  Written by Limor Fried/Ladyada for Adafruit Industries.
  BSD license, all text above must be included in any redistribution
 ****************************************************/

#include 


#if (defined(__AVR__) || defined(ESP8266)) && !defined(__AVR_ATmega2560__)
// For UNO and others without hardware serial, we must use software serial...
// pin #2 is IN from sensor (GREEN wire)
// pin #3 is OUT from arduino  (WHITE wire)
// Set up the serial port to use softwareserial..
SoftwareSerial mySerial(2, 3);

#else
// On Leonardo/M0/etc, others with hardware serial, use hardware serial!
// #0 is green wire, #1 is white
#define mySerial Serial1

#endif


Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);

uint8_t id;

void setup()
{
  Serial.begin(9600);
  while (!Serial);  // For Yun/Leo/Micro/Zero/...
  delay(100);
  Serial.println("\n\n指纹传感器登记");

  // set the data rate for the sensor serial port
  finger.begin(57600);

  if (finger.verifyPassword()) {
    Serial.println("找到指纹传感器");
  } else {
    Serial.println("没有找到指纹传感器:(");
    while (1) { delay(1); }
  }

  Serial.println(F("阅读传感器参数"));
  finger.getParameters();
  Serial.print(F("状态: 0x")); Serial.println(finger.status_reg, HEX);
  Serial.print(F("Sys ID: 0x")); Serial.println(finger.system_id, HEX);
  Serial.print(F("Capacity: ")); Serial.println(finger.capacity);
  Serial.print(F("安全等级: ")); Serial.println(finger.security_level);
  Serial.print(F("设备地址: ")); Serial.println(finger.device_addr, HEX);
  Serial.print(F("Packet len: ")); Serial.println(finger.packet_len);
  Serial.print(F("波特率: ")); Serial.println(finger.baud_rate);
}

uint8_t readnumber(void) {
  uint8_t num = 0;

  while (num == 0) {
    while (! Serial.available());
    num = Serial.parseInt();
  }
  return num;
}

void loop()                     // run over and over again
{
  Serial.println("准备注册指纹！");
  Serial.println("请输入ID号(从1到127)，你想保存这个手指为…");
  id = readnumber();
  if (id == 0) {// ID #0 not allowed, try again!
     return;
  }
  Serial.print("注册 ID #");
  Serial.println(id);

  while (!  getFingerprintEnroll() );
}

uint8_t getFingerprintEnroll() {

  int p = -1;
  Serial.print("等待有效的手指注册为#"); Serial.println(id);
  while (p != FINGERPRINT_OK) {
    p = finger.getImage();
    switch (p) {
    case FINGERPRINT_OK:
      Serial.println("拍摄");
      break;
    case FINGERPRINT_NOFINGER:
      Serial.println(".");
      break;
    case FINGERPRINT_PACKETRECIEVEERR:
      Serial.println("通信错误");
      break;
    case FINGERPRINT_IMAGEFAIL:
      Serial.println("成像错误");
      break;
    default:
      Serial.println("未知错误");
      break;
    }
  }

  // OK success!

  p = finger.image2Tz(1);
  switch (p) {
    case FINGERPRINT_OK:
      Serial.println("图像转换");
      break;
    case FINGERPRINT_IMAGEMESS:
      Serial.println("图像太混乱");
      return p;
    case FINGERPRINT_PACKETRECIEVEERR:
      Serial.println("通信错误");
      return p;
    case FINGERPRINT_FEATUREFAIL:
      Serial.println("找不到指纹特征");
      return p;
    case FINGERPRINT_INVALIDIMAGE:
      Serial.println("找不到指纹特征");
      return p;
    default:
      Serial.println("未知错误");
      return p;
  }

  Serial.println("请拿开手指");
  delay(2000);
  p = 0;
  while (p != FINGERPRINT_NOFINGER) {
    p = finger.getImage();
  }
  Serial.print("ID "); Serial.println(id);
  p = -1;
  Serial.println("再次放同一个手指");
  while (p != FINGERPRINT_OK) {
    p = finger.getImage();
    switch (p) {
    case FINGERPRINT_OK:
      Serial.println("拍摄");
      break;
    case FINGERPRINT_NOFINGER:
      Serial.print(".");
      break;
    case FINGERPRINT_PACKETRECIEVEERR:
      Serial.println("通信错误");
      break;
    case FINGERPRINT_IMAGEFAIL:
      Serial.println("成像错误");
      break;
    default:
      Serial.println("未知错误");
      break;
    }
  }

  // OK success!

  p = finger.image2Tz(2);
  switch (p) {
    case FINGERPRINT_OK:
      Serial.println("图像转换");
      break;
    case FINGERPRINT_IMAGEMESS:
      Serial.println("图像太混乱");
      return p;
    case FINGERPRINT_PACKETRECIEVEERR:
      Serial.println("通信错误");
      return p;
    case FINGERPRINT_FEATUREFAIL:
      Serial.println("找不到指纹特征");
      return p;
    case FINGERPRINT_INVALIDIMAGE:
      Serial.println("找不到指纹特征");
      return p;
    default:
      Serial.println("未知错误");
      return p;
  }

  // OK converted!
  Serial.print("创建模型为#");  Serial.println(id);

  p = finger.createModel();
  if (p == FINGERPRINT_OK) {
    Serial.println("打印匹配!");
  } else if (p == FINGERPRINT_PACKETRECIEVEERR) {
    Serial.println("通信错误");
    return p;
  } else if (p == FINGERPRINT_ENROLLMISMATCH) {
    Serial.println("指纹不匹配");
    return p;
  } else {
    Serial.println("未知错误");
    return p;
  }

  Serial.print("ID "); Serial.println(id);
  p = finger.storeModel(id);
  if (p == FINGERPRINT_OK) {
    Serial.println("存储!");
  } else if (p == FINGERPRINT_PACKETRECIEVEERR) {
    Serial.println("通信错误");
    return p;
  } else if (p == FINGERPRINT_BADLOCATION) {
    Serial.println("不能存储在那个位置");
    return p;
  } else if (p == FINGERPRINT_FLASHERR) {
    Serial.println("写入闪存错误");
    return p;
  } else {
    Serial.println("未知错误");
    return p;
  }

  return true;
}

指纹锁代码：

/***************************************************
  This is an example sketch for our optical Fingerprint sensor

  Designed specifically to work with the Adafruit BMP085 Breakout
  ----> http://www.adafruit.com/products/751

  These displays use TTL Serial to communicate, 2 pins are required to
  interface
  Adafruit invests time and resources providing this open source code,
  please support Adafruit and open-source hardware by purchasing
  products from Adafruit!

  Written by Limor Fried/Ladyada for Adafruit Industries.
  BSD license, all text above must be included in any redistribution
 ****************************************************/


#include 
#include 
#include 
LiquidCrystal_I2C lcd(0x27, 16, 2);
int servopin = 8;
int buzzer = 5;

void servopulse(int angle)//定义一个脉冲函数
{
  int pulsewidth = (angle * 11) + 500; //将角度转化为500-2480的脉宽值
  digitalWrite(servopin, HIGH);   //将舵机接口电平至高
  delayMicroseconds(pulsewidth);  //延时脉宽值的微秒数
  digitalWrite(servopin, LOW);    //将舵机接口电平至低
  delayMicroseconds(20000 - pulsewidth);
}

#if (defined(__AVR__) || defined(ESP8266)) && !defined(__AVR_ATmega2560__)
// For UNO and others without hardware serial, we must use software serial...
// pin #2 is IN from sensor (GREEN wire)
// pin #3 is OUT from arduino  (WHITE wire)
// Set up the serial port to use softwareserial..
SoftwareSerial mySerial(2, 3);

#else
// On Leonardo/M0/etc, others with hardware serial, use hardware serial!
// #0 is green wire, #1 is white
#define mySerial Serial1

#endif


Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);

void setup()
{
  Serial.begin(9600);
  while (!Serial);  // For Yun/Leo/Micro/Zero/...
  delay(100);
  Serial.println("\n\n手指检测测试");

  // set the data rate for the sensor serial port
  finger.begin(57600);
  delay(5);
  lcd.init();                  // 初始化LCD
  lcd.backlight();             //设置LCD背景等亮

  
  if (finger.verifyPassword()) {
    Serial.println("发现指纹传感器 憨批!");
    lcd.setCursor(0,0);
    lcd.print("Found fingerprint");
    delay(1000);
    
  } else {
    Serial.println("No Found fingerprint sensor");
    lcd.setCursor(0,0);
    lcd.print("no find！");
    lcd.setCursor(0,1);
    lcd.print("Check Connections");
    delay(1000);
    while (1) {
      delay(1);
    }
  }
  lcd.clear();

  Serial.println(F("阅读传感器参数"));
  finger.getParameters();
  Serial.print(F("状态: 0x")); Serial.println(finger.status_reg, HEX);
  Serial.print(F("Sys ID: 0x")); Serial.println(finger.system_id, HEX);
  Serial.print(F("Capacity: ")); Serial.println(finger.capacity);
  Serial.print(F("安全等级: ")); Serial.println(finger.security_level);
  Serial.print(F("设备地址: ")); Serial.println(finger.device_addr, HEX);
  Serial.print(F("Packet len: ")); Serial.println(finger.packet_len);
  Serial.print(F("波特率: ")); Serial.println(finger.baud_rate);

  finger.getTemplateCount();

  if (finger.templateCount == 0) {
    Serial.print("传感器不包含任何指纹数据。请运行“注册”示例。");
  }
  else {
    Serial.println("等待有效的手指…");
    Serial.print("传感器包含 "); Serial.print(finger.templateCount); Serial.println(" 模板");
  }
}

void loop()                     // run over and over again
{
  getFingerprintIDez();
  delay(50);            //don't ned to run this at full speed.
}

uint8_t getFingerprintID() {
  uint8_t p = finger.getImage();
  switch (p) {
    case FINGERPRINT_OK:
      Serial.println("拍摄");
      break;
    case FINGERPRINT_NOFINGER:
      Serial.println("没有检测到手指");
      return p;
    case FINGERPRINT_PACKETRECIEVEERR:
      Serial.println("通信错误");
      return p;
    case FINGERPRINT_IMAGEFAIL:
      Serial.println("成像误差");
      return p;
    default:
      Serial.println("未知错误");
      return p;
  }

  // OK success!

  p = finger.image2Tz();
  switch (p) {
    case FINGERPRINT_OK:
      Serial.println("图像转换");
      return p;
    case FINGERPRINT_IMAGEMESS:
      Serial.println("图像太乱");
      return p;
    case FINGERPRINT_PACKETRECIEVEERR:
      Serial.println("通信错误");
      return p;
    case FINGERPRINT_FEATUREFAIL:
      Serial.println("找不到指纹特征");
      return p;
    case FINGERPRINT_INVALIDIMAGE:
      Serial.println("找不到指纹特征");
      return p;
    default:
      Serial.println("未知错误");
      return p;
  }

  // OK converted!
  p = finger.fingerSearch();
  if (p == FINGERPRINT_OK) {
    Serial.println("找到匹配的指纹了!");
  } else if (p == FINGERPRINT_PACKETRECIEVEERR) {
    Serial.println("通信错误");
    return p;
  } else if (p == FINGERPRINT_NOTFOUND) {
    Serial.println("没有找到匹配对指纹");
    return p;
  } else {
    Serial.println("未知错误");
    return p;
  }

  // found a match!
  Serial.print("找到的 ID #"); Serial.print(finger.fingerID);
  Serial.print(" with confidence of "); Serial.println(finger.confidence);
  return finger.fingerID;
}

// returns -1 if failed, otherwise returns ID #
int getFingerprintIDez() {
  uint8_t p = finger.getImage();
  if (p != FINGERPRINT_OK) {
    lcd.setCursor(0,0);
    lcd.print("no Finger");
    return -1;
  }

  p = finger.image2Tz();
  if (p != FINGERPRINT_OK) {
    lcd.setCursor(0,0);
    lcd.print("Fingerprint");
    lcd.setCursor(0,1);
    lcd.print("error");
    delay(1000);
    lcd.clear();
    return -1;
  }

  p = finger.fingerFastSearch();
  if (p != FINGERPRINT_OK)  {
    lcd.setCursor(0,0);
    lcd.print("Fingerprint");
    lcd.setCursor(0,1);
    lcd.print("error");
    delay(1000);
    lcd.clear();
    return -1;
  }

  // found a match!
  Serial.print("找到的 ID #"); Serial.print(finger.fingerID);
  Serial.print(" with confidence of "); Serial.println(finger.confidence);
  lcd.setCursor(0,0);
  lcd.print("hello");
  delay(500);
  lcd.clear();
  int s=finger.fingerID;
  switch(s){
    case 2:
    lcd.setCursor(0,0);
    lcd.print("pt dad");
    delay(500);
    break;
    case 1:
    lcd.setCursor(0,0);
    lcd.print("llt shi dog");
    delay(500);
    break;
    case 3:
    lcd.setCursor(0,0);
    lcd.print("ly king");
    delay(500);
    break;
    case 4:
    lcd.setCursor(0,0);
    lcd.print("wmy si pig");
    delay(500);
    break;
    case 5:
    lcd.setCursor(0,0);
    lcd.print("wyl king");
    delay(500);
    break;
    case 6:
    lcd.setCursor(0,0);
    lcd.print("wyh hanpi");
    delay(500);
    break;
    case 8:
    lcd.setCursor(0,0);
    lcd.print("lwz niubi");
    delay(500);
    break;
    default:
    lcd.setCursor(0,0);
    lcd.print("lyp king");
    delay(500);
    break;
  }
  lcd.setCursor(0,1);
  lcd.print(finger.confidence);lcd.print("ms");
  delay(1000);
  lcd.clear();
  int angle = 50;
  for ( angle = 0; angle < 180; angle++) //angle+4是舵机的转速设置
  {
    servopulse(angle);
    delay(1);
  }
  Serial.print("欢迎回家");
  lcd.setCursor(0,0);
  lcd.print("welcome 504");
  lcd.setCursor(0,1);
  lcd.print("no Henan home");
  delay(3500); //这是拉门的持续时间 3.5秒
  for ( angle = 180; angle > 0; angle--)
  {
    servopulse(angle);
    delay(1);
  }
  lcd.clear();
  return finger.fingerID;
}

即可