Realize AS608 fingerprint recognition based on Raspberry Pi

Realize AS608 fingerprint recognition based on Raspberry Pi

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1. Display effect

1.1, press the finger

1.2, input finger

1.3, the match is successful

Note : Others only implement basic functions, and there are many other functions that can be added by yourself.

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2. The specific process

2.1, connect usb

首先使用ttl转接头跟AS608指纹模块相连接，插入树莓派，在命令行输入lsusb，查看是否出现HL-340

2.2, view the serial port

输入如下命令：

2.3, download serial port assistant

2.4, run minicom

2.5, enter the welcome page

此处运行即会产生如下画面，按下ctrl+A再按下Z进入帮助页面

2.6. Press o to enter the setting page

2.7, select setup

设置如下操作：

• serial device：ttyUSB0
• bps / par / bits ： 57600
• hardware: NO
  
  Note : The baud rate of AS608 is 57600. If it is too high, the module may be burned out.

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3. Code

import binascii
import serial
import serial.tools.list_ports
import time
# volatile unsigned char FPM10A_RECEICE_BUFFER[32];        //定义接收缓存区
# code unsigned char FPM10A_Pack_Head[6] = {0xEF,0x01,0xFF,0xFF,0xFF,0xFF};  //协议包头
# code unsigned char FPM10A_Get_Img[6] = {0x01,0x00,0x03,0x01,0x00,0x05};    //获得指纹图像
# code unsigned char FPM10A_Img_To_Buffer1[7]={0x01,0x00,0x04,0x02,0x01,0x00,0x08}; //将图像放入到BUFFER1
# code unsigned char FPM10A_Search[11]={0x01,0x00,0x08,0x04,0x01,0x00,0x00,0x00,0x64,0x00,0x72}; //搜索指纹搜索范围0 - 999,使用BUFFER1中的特征码搜索

def recv(serial):
    while True:
        data = serial.read_all()
        if data == '':
            continue
        else:
            break
    return data

if __name__ == '__main__':
    serial = serial.Serial('/dev/ttyUSB0', 57600, timeout=0.5)  #/dev/ttyUSB0
    if serial.isOpen() :
        print("open success")
    else :
        print("open failed")
    while True:
        a = 'EF 01 FF FF FF FF 01 00 03 01 00 05'
        d = bytes.fromhex(a)
        serial.write(d)
        time.sleep(1)
        data =recv(serial)
        if data != b'' :
            data_con = str(binascii.b2a_hex(data))[20:22]
            if(data_con == '02'):
                print("请按下手指")
            elif(data_con == '00'):
                print("载入成功")
                buff = 'EF 01 FF FF FF FF 01 00 04 02 01 00 08'
                buff = bytes.fromhex(buff)
                serial.write(buff)
                time.sleep(1)
                buff_data = recv(serial)
                buff_con = str(binascii.b2a_hex(buff_data))[20:22]
                if(buff_con == '00'):
                    print("生成特征成功")
                    serch = 'EF 01 FF FF FF FF 01 00 08 04 01 00 00 00 64 00 72'
                    serch = bytes.fromhex(serch)
                    serial.write(serch)
                    time.sleep(1)
                    serch_data = recv(serial)
                    serch_con = str(binascii.b2a_hex(serch_data))[20:22]
                    if (serch_con == '09'):
                        print("指纹不匹配")
                    elif(serch_con == '00'):
                        print("指纹匹配成功")
                serial.close()
                exit()
            else:
                print("不成功")

其中有一些16进制的字符串，那就是所代表的命令，用hex接受的。在指南手册里面还有许多功能，比如添加指纹什么的，只需要按照这个写就行了。

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4. Specific effects