For Arduino

#include <SoftwareSerial.h>

SoftwareSerial mySerial(10, 11); // RX, TX
#define LED_PIN 13

void setup() {
  pinMode(LED_PIN, OUTPUT);
  mySerial.begin(9600);
}

void loop() {
  if (mySerial.available()) {
    String inputString = mySerial.readString();
    if (inputString.indexOf("SONY") >= 0) {
      digitalWrite(LED_PIN, HIGH);
      mySerial.println("_Pictures");
    } else {
      digitalWrite(LED_PIN, LOW);
    }
  }
}



#include <windows.h>
#include <stdio.h>

int main() {
    HANDLE hCom;
    BOOL fSuccess;
    char *pszPortName = "COM3"; // COM-порт Arduino
    char *pszMessage = "SONY";
    DWORD dwNumBytesWritten = 0;
    DWORD dwNumBytesRead = 0;
    char inbuff[10];

    // Открываем COM-порт
    hCom = CreateFile(pszPortName, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);

    if (hCom == INVALID_HANDLE_VALUE) {
        printf("Failed to open COM: %dn", GetLastError());
        return 1;
    }

    // Отправляем сообщение
    fSuccess = WriteFile(hCom, pszMessage, strlen(pszMessage), &dwNumBytesWritten, NULL);

    if (!fSuccess) {
        printf("WriteFile failed: %dn", GetLastError());
        return 1;
    }

    // Получаем ответ
    fSuccess = ReadFile(hCom, inbuff, 10, &dwNumBytesRead, NULL);

    if (!fSuccess) {
        printf("ReadFile failed: %dn", GetLastError());
        return 1;
    }
    printf("Received: %sn", inbuff);

    return 0;
}