hey guys, I am a little new to Arduino and I was wondering if I could get some help on one of the projects I am working on right now.
So what happens is that I have a string called "key" that has a password stored on it beforehand such as "banana" when I type into my serial monitor it will send what I typed to the LCD and if what I typed and what the password is are the same then there is a message on the LCD saying "Correct password". But if it not the correct password then there is a try again message. What I am having trouble with is getting the Serial.read() to be compared to my "key" variable in my if statements. I would really be grateful if someone would help out, my code is below.
const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
#include <LiquidCrystal.h>
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
String key = "radical dude";
void setup() {
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// initialize the serial communications:
Serial.begin(9600);
}
void loop() {
// when characters arrive over the serial port...
if (Serial.available()) {
// wait a bit for the entire message to arrive
delay(100);
// clear the screen
lcd.clear();
// read all the available characters
while (Serial.available() > 0) {
// display each character to the LCD
lcd.write(Serial.read());
}
}
if (Serial.read == key){
lcd.clear();
lcd.print("Password accepted");
}
if (Serial.read != key){
lcd.clear();
lcd.print("Incorrect");
}
}
In the if statements it keeps saying that I have a "non-static member function".
Where are the brackets in the function call ?
BUT, even with that fixed will reading a single byte that has already been removed from the buffer 3 lines above ever equal a string of multiple characters ?
const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
#include <LiquidCrystal.h>
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
const int key = 97;
int password = 0;
void setup() {
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// initialize the serial communications:
Serial.begin(9600);
lcd.print("Enter the ");
lcd.setCursor(0,1);
lcd.print("password");
pinMode(9, OUTPUT);
pinMode(10, OUTPUT);
}
void loop() {
// when characters arrive over the serial port...
if (Serial.available()) {
// wait a bit for the entire message to arrive
delay(100);
// clear the screen
lcd.clear();
// read all the available characters
while (Serial.available() > 0) {
// display each character to the LCD
int password = Serial.read();
Serial.println(Serial.read());
if (password == key){
lcd.clear();
lcd.print("Acsess Granted");
digitalWrite(10, HIGH);
delay(1000);
}
if (password != key){
lcd.clear();
lcd.print("Incorrect,please");
lcd.setCursor(0,1);
lcd.print("try again");
digitalWrite(9, HIGH);
delay(100);
digitalWrite(9, LOW);
delay(100);
digitalWrite(9, HIGH);
delay(10000);
}
}
}
}
