Issue Sending text to COM Port - c++

Question

I have a PLC connected to one of my laptop's COM Ports and I've trying to send it a default command that returns a default response. Currently WriteFile successfully sends the 20 bit command but ReadFile doesn't read anything though there's no error.
int main(){
HANDLE hCom = CreateFile("\\\\.\\COM4",
GENERIC_READ | GENERIC_WRITE,
0,
NULL,
OPEN_EXISTING,
0,
NULL);
if (hCom == INVALID_HANDLE_VALUE)
{
DWORD err=GetLastError();
std::cout << "Failed\n";
return 0;
}
DCB dcbConfig;
if(GetCommState(hCom, &dcbConfig))
{
dcbConfig.BaudRate = CBR_115200;
dcbConfig.ByteSize = 8;
dcbConfig.Parity = NOPARITY;
dcbConfig.StopBits = ONESTOPBIT;
dcbConfig.fBinary = TRUE;
dcbConfig.fParity = FALSE;
}
if(!SetCommState(hCom, &dcbConfig))
{
CloseHandle(hCom);
return 0;
}
COMMTIMEOUTS commTimeout;
if(GetCommTimeouts(hCom, &commTimeout))
{
commTimeout.ReadIntervalTimeout = 1;
commTimeout.ReadTotalTimeoutConstant = 1;
commTimeout.ReadTotalTimeoutMultiplier = 1;
commTimeout.WriteTotalTimeoutConstant = 1;
commTimeout.WriteTotalTimeoutMultiplier = 1;
}
if(!SetCommTimeouts(hCom, &commTimeout))
//Handle Error Condition
CloseHandle(hCom);
// Write to the COM
static char data[22]="%01#RDD0010000107**\n";
int size = strlen(data);
DWORD dwWritten, dwReading;
int j;
WriteFile(hCom,data,(DWORD)size,&dwWritten,NULL);
DWORD err=GetLastError();
std::cout << err;
char datarecv[22];
ReadFile(hCom,&datarecv,1,&dwReading,NULL);
err = GetLastError();
std::cout << err;
std::cout << datarecv << "\n";
CloseHandle(hCom);
std::cin>>j;
return 0;
}