See the Thread, "Keil C: read two byte?" for a discussion of addressing the 2 bytes of an int (the discussion is not specific to Keil).

Beware: When sending binary data on an RS232 link, you must be sure that nothing on the link (hardware or software) will try to interpret any of your data as any sort of control condes (eg, 0x0D=CR; 0x0A=LF; 0x11=XON; 0x13=XOFF), and that everything on the link can correctly handle 8-bit data.