How do I direct advert from BL600 to a specific BL620?

The following code will run on BL600 and direct advert to BL620 with specific MAC address: dim rc,addr$ addr$ = "\02\D4\F4\6F\CA\C8\E7" ?? ?? ?? //address of specific BL620 rc = BleAdvertStart(1,addr$,100,0,0) WaitEvent I tried direct advert with a smartphone instead of the BL620 but was unsuccessful, this is most likely because the MAC on smartphone changes.