Device Login Using Button

Indusboard coin is programmed like a login key for devices where the password can be stolen or seem by people in public.

In this program, the Indus board is used as a login device/key for a laptop, in which the password of laptop is programmed into the board and then by clicking the external button, the password is automatically entered and the laptop is unlocked.

Arduino Code:

 /* 
connect pin 9 of indusboard coin with a push button. 
enter password in line 40. 
*/ 
#if ARDUINO_USB_MODE 
#warning This sketch should be used when USB is in OTG mode 
void setup(){} 
void loop(){} 
#else 
#include "USB.h" 
#include "USBHIDKeyboard.h" 
USBHIDKeyboard Keyboard; 
const int loginButton = 9; // Button to trigger the login sequence 
void setup() { 
// initialize the button input: 
pinMode(loginButton, INPUT_PULLUP); 
// initialize the keyboard: 
Keyboard.begin(); 
USB.begin(); 
Serial.begin(115200); 
} 
void loop() { 
// check if the login button is pressed: 
if (digitalRead(loginButton) == LOW) { 
loginSequence(); 
delay(5000); // wait 5 seconds before allowing another login attempt 
} 
delay(5); 
} 
void loginSequence() { 
// Replace "YourUsername" and "YourPassword" with your actual login credentials 
// String username = ""; 
String password = ""; 
// // Type the username 
// typeString(username); 
// Keyboard.write(KEY_TAB); // press Tab to switch to the password field 
// delay(500); 
// Type the password 
typeString(password); 
Keyboard.write(KEY_RETURN); // press Enter to login 
} 
void typeString(String str) { 
for (int i = 0; i < str.length(); i++) { 
Keyboard.write(str[i]); 
delay(100); // add a small delay between keystrokes 
} 
} 
#endif /* ARDUINO_USB_MODE */ 

Schematic and practical implementation:

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Author(s): Manjeet Vishwakarma,  Abhay Verma and Satywanti Kundu are B.Tech ECE students at GJUS&T HISAR