我正在尝试使用 Arduino 创建一个 ATM 模块。我使用 RFID 阅读器扫描卡和 Adafruit 指纹模块以进行指纹验证。问题是两者都可以工作，但不能一起工作。这是我的代码：
#include <Key.h>
#include <Keypad.h>
#include <Adafruit_Fingerprint.h>
#include <SD.h>
#include <SPI.h>
#include<SoftwareSerial.h>
SoftwareSerial mySerial(0, 1);
SoftwareSerial mySerials(2, 3);
int read_count = 0, tag_count = 0;
int j = 0, k = 0; // Variabvles to iterate in for loops
char data_temp, RFID_data[12], data_store[12];
boolean disp_control;
char filename[4], fileText[30], names[10];
int atm[5];
uint8_t n, num, p;
char key;
int p1, p2, p3, p4, z;
char fid;
File myFile;
Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerials);
const byte ROWS = 4; //four rows
const byte COLS = 4; //four columns
char keys[ROWS][COLS] = {
{'1', '2', '3', 'A'},
{'4', '5', '6', 'B'},
{'7', '8', '9', 'C'},
{'*', '0', '#', 'D'}
};
byte rowPins[ROWS] = {5, 4, 3, 2}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {9, 8, 7, 6}; //connect to the column pinouts of the keypad
Keypad keypads = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
void setup() {
finger.begin(57600);
mySerial.begin(9600);
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.print("Initializing SD card...");
if (!SD.begin(4)) {
Serial.println("initialization failed!");
while (1);
}
Serial.println("initialization done.");
Serial.println("Please Place Your Card");
}
void RecieveData()
{
if (mySerial.available() > 0)
{
data_temp = mySerial.read();
RFID_data[read_count] = data_temp;
read_count++;
}
}
void ReadData()
{
if (read_count == 12) {
disp_control = true;
for (j = 0; j < 12; j++) {
data_store[j] = RFID_data[j];
}
int x = 0;
for (int i = 9; i < 12; i++) {
filename[x] = data_store[i];
x++;
}
filename[3] = '.';
filename[4] = 't';
filename[5] = 'x';
filename[6] = 't';
filename[7] = '\0';
myFile = SD.open(filename, FILE_READ);
if (myFile) {
// read from the file until there's nothing else in it:
while (myFile.available()) {
for (int i = 0; i < 20; i++) {
fileText[i] = myFile.read();
}
int a, n = 0;
for (int i = 0; i < 4; i++) {
atm[a] = fileText[i];
a++;
}
for (int i = 5; fileText[i] != '\0'; i++) {
names[n] = fileText[i];
n++;
}
fid = fileText[4];
validate();
myFile.close();
}
} else {
// if the file didn't open, print an error:
Serial.println("error opening test.txt");
}
read_count = 0;
tag_count++;
}
}
void validate() {
Serial.print("Hello ");
Serial.print(names);
Serial.println();
Serial.println();
Serial.println();
pin();
}
void pin() {
Serial.println("Please Enter Your ATM PIN");
p1 = keypads.getKey();
while (p1 == NO_KEY) {
p1 = keypads.getKey(); //UPDATE VALUE
}
Serial.print(p1 - 48);
p2 = keypads.getKey();
while (p2 == NO_KEY) {
p2 = keypads.getKey(); //UPDATE VALUE
}
Serial.print(p2 - 48);
p3 = keypads.getKey(); //UPDATE VALUE
while (p3 == NO_KEY) {
p3 = keypads.getKey(); //UPDATE VALUE
}
Serial.print(p3 - 48);
p4 = keypads.getKey(); //UPDATE VALUE
while (p4 == NO_KEY) {
p4 = keypads.getKey(); //UPDATE VALUE
}
Serial.print(p4 - 48);
Serial.println();
if ((p1 == fileText[0]) && (p2 == fileText[1]) && (p3 == fileText[2]) && (p4 == fileText[3])) {
Serial.println("Please verify Fingerprint");
}
else {
Serial.println("Invalid. Buzzer!!!!");
}
}
uint8_t getFingerprintID() {
uint8_t p = finger.getImage();
switch (p) {
case FINGERPRINT_OK:
Serial.println("Image taken");
break;
case FINGERPRINT_NOFINGER:
Serial.println("No finger detected");
return p;
case FINGERPRINT_PACKETRECIEVEERR:
Serial.println("Communication error");
return p;
case FINGERPRINT_IMAGEFAIL:
Serial.println("Imaging error");
return p;
default:
Serial.println("Unknown error");
return p;
}
// OK success!
p = finger.image2Tz();
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!
p = finger.fingerFastSearch();
if (p == FINGERPRINT_OK) {
Serial.println("Found a print match!");
} else if (p == FINGERPRINT_PACKETRECIEVEERR) {
Serial.println("Communication error");
return p;
} else if (p == FINGERPRINT_NOTFOUND) {
Serial.println("Did not find a match");
return p;
} else {
Serial.println("Unknown error");
return p;
}
// found a match!
Serial.print("Found ID #"); Serial.print(finger.fingerID);
Serial.print(" with confidence of "); Serial.println(finger.confidence);
return finger.fingerID;
}
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;
Serial.print("Found ID #"); Serial.print(finger.fingerID);
Serial.print(" with confidence of "); Serial.println(finger.confidence);
return finger.fingerID;
// found a match!
/*z = finger.fingerID;
if ((fid - 48) == z) {
Serial.println("Success");
}
else {
Serial.println("Fail");
}*/
}
void loop() {
RecieveData();
ReadData();
getFingerprintIDez();
delay(50);
}
如果我以这种格式初始化，则指纹有效：
mySerial.begin(9600);
finger.begin(57600);
Serial.begin(9600);
如果我这样做，那么 RFID 工作：
finger.begin(57600);
mySerial.begin(9600);
Serial.begin(9600);
我希望他们两个都能工作，即；我首先扫描卡，然后验证密码，然后检查指纹的有效性。但问题是一次只有其中一个有效。如果 RFID 工作，那么指纹甚至不会闪烁，如果指纹工作，RFID 不会读取。
我是新手，我不知道我哪里出错了。