Arduino state not declared in this scope - arduino

Question

I am currently working on a small project using arduino and the below is my code:
#include <SoftwareSerial.h>
#include <Adafruit_Fingerprint.h>
#include <Keypad.h>
const byte ROWS = 4; // Four rows
const byte COLS = 3; // Three columns
// Define the Keymap
char keys[ROWS][COLS] = {
{'1','2','3'},
{'4','5','6'},
{'7','8','9'},
{'#','0','*'}
};
// Connect keypad ROW0, ROW1, ROW2 and ROW3 to these Arduino pins.
byte rowPins[ROWS] = {2, 3, 4, 5};
// Connect keypad COL0, COL1 and COL2 to these Arduino pins.
byte colPins[COLS] = {6, 7, 8};
// Create the Keypad
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
#define ledpin 13
#define LOCKED 2
#define PASSWORD_OK 1
#define UNLOCKED 0
//State Variables; initialise to locked state
int LockState = LOCKED;
int position = 0;
void setup()
{
pinMode(ledpin,OUTPUT);
digitalWrite(ledpin, HIGH);
Serial.begin(9600);
//Initialize state and communications
setLockState(LOCKED);
Serial.begin(9600);
}
void loop()
{
char key = keypad.getKey();
if(key) // Check for a valid key.
{
switch (key)
{
// case '*':
// digitalWrite(ledpin, LOW);
// break;
// case '#':
// digitalWrite(ledpin, HIGH);
// break;
default:
Serial.print(key);
}
}
}
It was from Adafruit. however, when i upload to my uno, it keeps giving me the error: 'setLockState' was not declared in this scope.
Can anyone shed some light on this?

Answer 1

I think you did not declare the function setLockState() in your code. I don't know about your project details, but it looks like you want to lock a thing via keypad or fingerprint. You can find a great Tutorial (including the missing setLockState() function) for a biometric-security-box on the website of Adafruit.