Hi guys, need some help about Serial Camera connected to Arduino Mega

i got a problem about sending a command on this Serial camera
here’s the module of what i have bought.

i tried to send a command by this code:

byte syncCamera = {0xAA, 0x0D, 0x00, 0x00, 0x00, 0x00};
byte r_data[6];
void setup()
{
Serial.begin(9600);
Serial1.begin(115200);
trySYNC();
}

void loop()
{
}

void trySYNC()
{
for (int i = 0; i<6; i++)
{
Serial1.write(syncCamera[ i ]);
Serial.print(syncCamera[ i ], HEX);
Serial.print(" “);
}
Serial.println();
if(Serial1.available());
for (int x = 0; x < 6; x++)
{
r_data[ x ] = Serial1.read();
Serial.print(r_data[ x ], HEX);
Serial.print(” ");
}
Serial.println();
}

before i upload this code the led on Serial camera is still On, after uploading it goes OFF and i got an output of:
AA D 0 0 0 0
FF FF FF FF FF FF

need some help on how to send command and get the right response. thx