To The above code I added
char mac_address[18];
sprintf(mac_address,"%02X:%02X:%02X:%02X:%02X:%02X",uuid.Data4[2],uuid.Data4[3],uuid.Data4[4],uuid.Data4[5],uuid.Data4[6],uuid.Data4[7]);
can replace : with -
This gives the exact mac address of 6 2digits