android app cann't connect ble device without scan

[lemon]

Hi,

I am develope a ble device use nrf51822 , when I use a Android app to connect the device without start a scan , only use the mac address to connect the device , I cann;t connect to the device success.

And there is another device use CC2541, I can connect this CC2541 device only use the mac address to connect without a scan ,

Is someone have the simlar problem ?

[David Edwin]

This is my hypothesis, I suspect that the CCxxxx is using a public address while the nRF5x is using a random static address. You can change the address in the nRF5x to be a public address for a test (you can use that address on the CC with an offset just for the test).

Additionally you can use a sniffer to see the addresses that are being used for the CC and the nRF5x and post it here so we can look at it.

[lemon]

You are right,the reason is the address type.

When  I change  the address type to publiec,it works fine.

Thanks for your advice !!