Interface GSM and Keypad with Arduino

Objective: The project aims to create an interface using a 4×4 keypad and a GSM module with an Arduino to allow users to input a mobile number, display it on an LCD, and send a predefined message to the entered number.

Components Needed:

  1. Arduino Board (e.g., Arduino Uno)
  2. 4×4 Matrix Keypad
  3. GSM Module (e.g., SIM900A)
  4. LCD Display (16×2)
  5. Breadboard and Jumper Wires
  6. Power Supply

Functionality:

  1. User Input: The user will input a mobile number using the 4×4 keypad. Each keypress will be displayed on the LCD screen.
  2. Display on LCD: As the user types in the mobile number, the LCD will dynamically update to show the current input.
  3. Sending Message: Once the user finishes entering the number, The system will then send a predefined message (e.g., “Hello from Arduino!”) to the entered mobile number via the GSM module.
  4. Feedback: The system can provide feedback on the LCD, indicating whether the message was sent successfully or if there was an error (e.g., “Message Sent” or “Error Sending”).

Wiring and Connections:

  • Connect the keypad to the appropriate digital pins on the Arduino.
  • Connect the GSM module to the Arduino using serial communication (TX/RX pins).
  • Connect the LCD to the Arduino, ensuring the data pins and control pins are properly configured.

Project Code:

  • Download project code from below button.
  • If you want to understand code explanations then please watch YouTube video.

Click here to download code

YouTube Video:

  • If you want to understand how to connect hardware with Raspberry Pi,
  • And Program explanation for this project,
  • And how to do this project by yourself then please watch our YouTube video.

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