c - Sending 2 bytes hexadecimal to a remote serial -

i need send hexadecimal remote serial device accept it.

2 byte hexadecimal need send is:

181e 

i can telnet remote serial , send command:

telnet x.x.x.x port  181e 

i response okay.

how can in linux c?

i want use write function.

err = write(socket,181e,2); 

or how can store 2 byte decimal variable read 181e?

int this_is_2_bytes = 181e; // correct?  err = write(socket, this_is_2_bytes, sizeof(this_is_2_bytes)); 

you need send hexadecimal string. so,

const char cmd[] = "181e"; err = write(socket, cmd, strlen(cmd));