RS232-TTL Module with Arduino

I have connected arduino mega with a rs232-ttl module.

When I am sending some hex code from arduino to pc, it is being received fine on Serial Port Monitor software.

But when I am doing the reverse operation ie, sending some hex code from the same software to arduino, it is not being received.

My code is:


SoftwareSerial mySerial(6, 7); // Rx, Tx
byte data[] = {0x7e, 0xa0, 0x07, 0x03, 0x41, 0x93, 0x5a, 0x64, 0x7e, 0x7e, 0xa0, 0x44, 0x03, 0x41, 0x10, 0xb3, 0xe1, 0xe6, 0xe6, 0x00, 0x60, 
              0x36, 0xa1, 0x09, 0x06, 0x07, 0x60, 0x85, 0x74, 0x05, 0x08, 0x01, 0x01, 0x8a, 0x02, 0x07, 0x80, 0x8b, 0x07, 0x60, 0x85, 0x74,
              0x05, 0x08, 0x02, 0x01, 0xac, 0x0a, 0x80, 0x08, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0xbe, 0x10, 0x04, 0x0e, 0x01,
              0x00, 0x00, 0x00, 0x06, 0x5f, 0x1f, 0x04, 0x00, 0x00, 0x1e, 0x1d, 0xff, 0xff, 0xd4, 0x34, 0x7e}; 

void setup()

void loop()
   mySerial.write(data, sizeof(data));
   if (mySerial.available())
     Serial.println("Reading from PC");
     Serial.println(, HEX);
     Serial.println("Can't read from PC");

Solved, there was some problem with the rs232-ttl module.

Why do you use SoftwareSerial on a Mega? A Mega has three spare serial ports that you can use.

Yes, I know it's a little late for a reply.