矩阵键盘密码能否用变量代替，实现在线更改密码~~
Password password = Password( "1234" );以上是例程里面的代码，密码是事先设定好了的
我想将上述密码设置成一个变量，可以在线更改密码
String comdata = "1234";
Password password = Password(comdata);
这个代码编译不能通过，求高人~~~~就是矩阵键盘的密码怎么用变量赋值？ 用password.set(newPassword);
请参考
http://ediy.com.my/index.php/tutorials/item/69-password-access-with-arduino-using-keypad#include <Keypad.h>
#include <Password.h>
String newPasswordString; //hold the new password
char newPassword; //charater string of newPasswordString
//initialize password to 1234
//you can use password.set(newPassword) to overwrite it
Password password = Password( "1234" );
byte maxPasswordLength = 6;
byte currentPasswordLength = 0;
const byte ROWS = 4; // Four rows
const byte COLS = 4; // Four columns
//Define the keymap
char keys = {
{'1','2','3','A'},
{'4','5','6','B'},
{'7','8','9','C'},
{'*','0','#','D'}
};
//// Connect keypad ROW0, ROW1, ROW2 and ROW3 to these Arduino pins.
byte rowPins = {6,7,8,9}; //connect to row pinouts
// Connect keypad COL0, COL1, COL2 and COL3 to these Arduino pins.
byte colPins = {2,3,4,5}; //connect to column pinouts
// Create the Keypad
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
void setup(){
Serial.begin(9600);
}
void loop(){
char key = keypad.getKey();
if (key != NO_KEY){
delay(60);
switch (key){
case 'A': break;
case 'B': break;
case 'C': break;
case 'D': changePassword(); break;
case '#': checkPassword(); break;
case '*': resetPassword(); break;
default: processNumberKey(key);
}
}
}
void processNumberKey(char key) {
Serial.print(key);
currentPasswordLength++;
password.append(key);
if (currentPasswordLength == maxPasswordLength) {
checkPassword();
}
}
void checkPassword() {
if (password.evaluate()){
Serial.println(" OK.");
} else {
Serial.println(" Wrong passwowrd!");
}
resetPassword();
}
void resetPassword() {
password.reset();
currentPasswordLength = 0;
}
void changePassword() {
newPasswordString = "123";
newPasswordString.toCharArray(newPassword, newPasswordString.length()+1); //convert string to char array
password.set(newPassword);
resetPassword();
Serial.print("Password changed to ");
Serial.println(newPasswordString);
}
void resetPassword() {
//do something to resetPassword
}
页:
[1]