#include <EEPROM.h>  // Include the EEPROM library

void setup() {
  // Start serial communication at 9600 baud rate
  Serial.begin(9600);

  // Wait for the Serial Monitor to open
  while (!Serial);

  // Print a welcome message to the user
  Serial.println("EEPROM Access");
  Serial.println("Commands:");
  Serial.println("read [address] - Read data from EEPROM at the given address");
  Serial.println("write [address] [value] - Write value to EEPROM at the given address");
}

void loop() {
  // Check if data is available to read from the serial input
  if (Serial.available()) {
    String command = Serial.readStringUntil('\n');  // Read input command

    // Trim any leading or trailing spaces
    command.trim();

    // If the command is "read"
    if (command.startsWith("read")) {
      // Extract the EEPROM address (after the "read" command)
      int address = command.substring(5).toInt();
      
      // Check if the address is within the valid range (0-1023 for Arduino Uno)
      if (address >= 0 && address <= 1023) {
        byte value = EEPROM.read(address);  // Read the value from EEPROM
        Serial.print("Value at address ");
        Serial.print(address);
        Serial.print(": ");
        Serial.println(value);
      } else {
        Serial.println("Invalid address. Please enter an address between 0 and 1023.");
      }
    }
    // If the command is "write"
    else if (command.startsWith("write")) {
      // Find the position of the space after "write"
      int spaceIndex = command.indexOf(' ', 6);  
      
      // Extract the EEPROM address and value
      int address = command.substring(6, spaceIndex).toInt();  
      int value = command.substring(spaceIndex + 1).toInt();  

      // Check if the address is within the valid range
      if (address >= 0 && address <= 1023) {
        EEPROM.write(address, value);  // Write the value to EEPROM
        Serial.print("Wrote value ");
        Serial.print(value);
        Serial.print(" to address ");
        Serial.println(address);
      } else {
        Serial.println("Invalid address. Please enter an address between 0 and 1023.");
      }
    }
    // Handle invalid commands
    else {
      Serial.println("Invalid command. Use 'read' or 'write'.");
    }
  }
}