基于Arduino和AS608模块的指纹门禁锁--舵机控制

网上刷到很多视频，看见很多和我一样的大学生自己用单片机给自己宿舍安装指纹锁，我们宿舍经常忘带钥匙，而且随身携带钥匙也很麻烦，所以我选择像网上的一样自己给自己做一个指纹锁，刚好实验室有3D打印机，也正好用三维建模软件给指纹模块做一个外壳，和一些用机械结构来实现开门的结构件，建模时预留了RFID的安装位置，后续在增加，实物如下所示：

根据自己的实际情况连接好各模块后可以参考以下程序编程，注意指纹模块RX，TX脚位和舵机控制脚位需要和你连接模块的脚位对应。

舵机各引脚代表意思：

橙色信号线

红色5V电源线

棕色GND地线

AS608指纹模块引脚：

（图片来源于网络）

1.在此之前，我们先要下好<Adafruit_Findgerprint.h>的库文件，将下载好的库解压到项目文件中的lib目录下，后续程序中需要用到此头文件：

Adafruit-Fingerprint-Sensor-Library-master（单击跳转）

2.主程序代码如下：

#include <Adafruit_Fingerprint.h>
#include <SoftwareSerial.h>
#include <Servo.h>Servo myservo;
//软件串口模拟通信，用来指定RX，TX引脚
SoftwareSerial mySerial(2, 3);//定义全局变量pos（舵机旋转度数）
int pos=0;//初始化
Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);
int fingerprintID = 0;
int getFingerprintIDez();void setup() {//舵机信号口myservo.attach(5);//指纹传感器模块设置Serial.begin(9600);//设置传感器串行端口的数据速率finger.begin(57600);//下列语句识别是否安装指纹模块if (finger.verifyPassword()) {Serial.println("Found fingerprint sensor!");}else {Serial.println("Did not find fingerprint sensor :(");while (1) { delay(1); }}
}void loop() {//初始化舵机度数（通电时舵机默认角度）//myservo.write(100);fingerprintID = getFingerprintIDez();delay(50);//如果找到下列指纹序号if(fingerprintID >= 0){pos=0;myservo.write(pos);delay(3800);pos=100;myservo.write(pos);delay(15);}delay(15);
}//指纹匹配函数，返回值为ID号
int getFingerprintIDez() {uint8_t p = finger.getImage();if (p != FINGERPRINT_OK)  return -1;p = finger.image2Tz();if (p != FINGERPRINT_OK)  return -1;p = finger.fingerFastSearch();if (p != FINGERPRINT_OK)  return -1;return finger.fingerID;
}

3.主程序写完后，新建一个程序文件，编写以下程序用来添加指纹数据，该文件可在Adafruit库的官方示例程序中找到：

（添加指纹的操作在串口监视器中进行）

/***************************************************This is an example sketch for our optical Fingerprint sensorDesigned specifically to work with the Adafruit BMP085 Breakout----> http://www.adafruit.com/products/751These displays use TTL Serial to communicate, 2 pins are required tointerfaceAdafruit invests time and resources providing this open source code,please support Adafruit and open-source hardware by purchasingproducts from Adafruit!Written by Limor Fried/Ladyada for Adafruit Industries.BSD license, all text above must be included in any redistribution****************************************************/#include <Adafruit_Fingerprint.h>#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#endifAdafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);uint8_t id;
uint8_t getFingerprintEnroll();void setup()
{Serial.begin(9600);while (!Serial);  // For Yun/Leo/Micro/Zero/...delay(100);Serial.println("\n\nAdafruit Fingerprint sensor enrollment");// set the data rate for the sensor serial portfinger.begin(57600);if (finger.verifyPassword()) {Serial.println("Found fingerprint sensor!");} else {Serial.println("Did not find fingerprint sensor :(");while (1) { delay(1); }}Serial.println(F("Reading sensor parameters"));finger.getParameters();Serial.print(F("Status: 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("Security level: ")); Serial.println(finger.security_level);Serial.print(F("Device address: ")); Serial.println(finger.device_addr, HEX);Serial.print(F("Packet len: ")); Serial.println(finger.packet_len);Serial.print(F("Baud rate: ")); 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("Ready to enroll a fingerprint!");Serial.println("Please type in the ID # (from 1 to 127) you want to save this finger as...");id = readnumber();if (id == 0) {// ID #0 not allowed, try again!return;}Serial.print("Enrolling ID #");Serial.println(id);while (!  getFingerprintEnroll() );
}uint8_t getFingerprintEnroll() {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;}}// OK success!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;}Serial.println("Remove finger");delay(2000);p = 0;while (p != FINGERPRINT_NOFINGER) {p = finger.getImage();}Serial.print("ID "); Serial.println(id);p = -1;Serial.println("Place same finger again");while (p != FINGERPRINT_OK) {p = finger.getImage();switch (p) {case FINGERPRINT_OK:Serial.println("Image taken");break;case FINGERPRINT_NOFINGER:Serial.print(".");break;case FINGERPRINT_PACKETRECIEVEERR:Serial.println("Communication error");break;case FINGERPRINT_IMAGEFAIL:Serial.println("Imaging error");break;default:Serial.println("Unknown error");break;}}// OK success!p = finger.image2Tz(2);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;}// OK converted!Serial.print("Creating model for #");  Serial.println(id);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;}Serial.print("ID "); Serial.println(id);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;
}

4.指纹添加完成后，再新建一个程序文件，编写以下代码，用来测试指纹是否添加成功，该文件可在Adafruit库的官方示例程序中找到：