barcode reader for Arduino recognize char - arrays

Question

I have a barcode code but need it to recognize the barcode so it can print to serial monitor. I have searched that I need to have it convert to int from char but have yet to find a way to do that if that is the answer.
For example I scan a barcode and if it is a certain number, then the serial monitor will print it.
#include <hid.h>
#include <hiduniversal.h>
#include <usbhub.h>
#include <Usb.h>
#include <hidboot.h>
#include <avr/pgmspace.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Bridge.h>
#include <FileIO.h>
#include <TM1637Display.h>
#define DEBUG true
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
const byte BarcodeLength = 11;
const int buzzer = 2;
const int CLK = 9; //Set the CLK pin connection to the display
const int DIO = 8; //Set the DIO pin connection to the display
const int DIO2 = 7; // Set 2nd DIO pin to second connection to display
const int CLK2 = 6; // Set the 2nd CLK pin to the second connection to display.
const int procTime = 5; // this is the time it takes for the process to finish countdown
int NumStep = 0; //Variable to interate
TM1637Display countdownDisplay(CLK, DIO); //set up the 4-Digit Display.
TM1637Display DelayedDisplay(CLK2, DIO2); //set up the 4-Digit Display.
class BarcodeReader : public KeyboardReportParser
{
USB Usb;
USBHub Hub;
HIDUniversal Hid;
HIDBoot<HID_PROTOCOL_KEYBOARD> Keyboard;
uint8_t buffer[15];
byte length;
bool valid;
void addCharacter(uint8_t c);
public:
BarcodeReader();
void begin();
void task();
const uint8_t* barcode();
void reset();
protected:
virtual void OnKeyDown(uint8_t mod, uint8_t key);
};
BarcodeReader::BarcodeReader()
: Usb()
, Hub(&Usb)
, Hid(&Usb)
, Keyboard(&Usb)
, length(0)
, valid(false)
{
}
void BarcodeReader::begin()
{
if (Usb.Init() == -1) {
Serial.println("OSC did not start.");
}
else
Serial.println("Barcode Ready");
Hid.SetReportParser(1, this);
}
void BarcodeReader::task()
{
Usb.Task();
}
void BarcodeReader::addCharacter(uint8_t c)
{
if (valid) {
// already have a barcode, new one will overwrite it
reset();
}
// could check for \n or \r if necessary, or even implement a timing
// mechanism for detecting end of barcode input, but for now we just
// assume fixed width field with no output separators
buffer[length++] = c;
//buffer[length] = '\0';
if (buffer[length] == '\0')
{
valid = true;
}
};
// return value no longer valid after another call to task()
const uint8_t* BarcodeReader::barcode()
{
return (valid) ? buffer : 0;
}
void BarcodeReader::reset()
{
length = 0;
valid = false;
}
void BarcodeReader::OnKeyDown(uint8_t mod, uint8_t key) {
uint8_t c = OemToAscii(mod, key);
if (c) addCharacter(c);
}
BarcodeReader barcodeReader;
void setup() {
countdownDisplay.showNumberDec(0);
DelayedDisplay.showNumberDec(0);
Bridge.begin();
Console.begin();
FileSystem.begin();
Serial.begin(9600);
if (DEBUG) Console.println("Done setup");
lcd.begin(16, 2);
pinMode(buzzer,OUTPUT);
//Serial.begin(115200);
lcd.print("Please Scan Your ID: ");
barcodeReader.begin();
countdownDisplay.setBrightness(0x0a); //set the diplay to maximum brightness
DelayedDisplay.setBrightness(0x0a);
}
void loop() {
//char *goodCards = { "1234567" };
//String dataString = "Testing, 1, 2, 3...";
File dataFile = FileSystem.open("/mnt/sda1/datalog.txt", FILE_APPEND);
// If the file opens successfully, write the string to it, close the file,
// and print the information to the Serial monitor.
barcodeReader.task();
const char* barcode = barcodeReader.barcode();
if (barcode || dataFile) {
lcd.print(barcode);
dataFile.print(barcode);
Serial.print(barcode);
barcodeReader.reset();
dataFile.close();
//If the barcode is the word 'Setup' then print setup to the screen
//search array of char conver strcmp(). You are sending 0101 not the actual value of 1234567
// collect all the input, convert it to an int
if(barcode == "0001") {
{
Serial.println(": SETUP");
}
}
}
//timer and barcode
//
// if(barcode == "1234567") {
// Serial.print(barcode);
// Serial.println(": SETUP");
//
//// analogWrite(A1,0);
//// analogWrite(A2,0);
// }
// if(barcode == "KAYAMAD") {
// Serial.print(barcode);
// Serial.println(": RUN");
//
//// analogWrite(A0,0);
//// analogWrite(A2,0);
// countdownDisplay.showNumberDec(0);
// DelayedDisplay.showNumberDec(0);
// for(int NumStep = procTime; NumStep > 0 ; NumStep--) //Interrate NumStep
// {
// countdownDisplay.showNumberDec(NumStep); //Display the Variable value;
// //DelayedDisplay.showNumberDec(NumStep); //Display the Variable value;
// delay(1000); //A second delay between steps.
// }
//
// for (int NumStep = 0; NumStep < 5 ; NumStep++) //Interrate NumStep
// {
// //countdownDisplay.showNumberDec(NumStep); //Display the Variable value;
// DelayedDisplay.showNumberDec(NumStep); //Display the Variable value;
// countdownDisplay.showNumberDec(0);
// delay(1000); //A second delay between steps.
//
// }
//
// }
//
// else if (barcode == "2234663") {
// Serial.print(barcode);
// Serial.println(": DELAY");
//
//// analogWrite(A0,0);
//// analogWrite(A1,0);
// countdownDisplay.showNumberDec(0);
// DelayedDisplay.showNumberDec(0);
//
//
// for (int NumStep = 0; NumStep < 5 ; NumStep++) //Interrate NumStep
// {
// //countdownDisplay.showNumberDec(NumStep); //Display the Variable value;
// DelayedDisplay.showNumberDec(NumStep); //Display the Variable value;
// countdownDisplay.showNumberDec(0);
// delay(1000); //A second delay between steps.
//
// }
//
//
// }
//
// If there is a problem opening the file, send an error to the Serial monitor
else {
if (DEBUG) Console.println("Error opening datalog.txt");
}
}

Answer 1

"Number" you get Computer sees as text, not number. We are sure that barcode will always be number. Conver char to int with atoi function.
Here's an example:
const char *bar = "123";
int bc = atoi(bar);