ANCS and nrf8001

[Emp2014]

I used nrf8001 to implement ANCS.It working fine.But when it disconnect for a while and reconnect(reconnect successed).I found Iphone can't send any ANCS message to nrf8001 until turn off/on bluetooth on iphone and reconnect again and it can work fine.

Is it IOS bug or nrf8001 limitation ?

[David Edwin]

There is an issue on the Apple side that it forgets the CCCD (Client Configuration Characteristic Descriptor) that was set by the nRF8001 after bonding. This results in the Apple device forgetting to Notify the nRF device. As a work around you can attempt to do: Do an ACI Close Remote pipe and then do an Open Remote Pipe on the pipes that have the Notify property on the ANCS side.

[Soren]

I ran into the same issue while using the hcitool command on my Ubuntu machine. The first connect works but the first reconnect does not work unless I reset the hci module (hciconfig hci0 reset) then establishing a connection becomes flawless.

[Emp2014]

Hi,

i tried to close/open Remote pipe when this issue happened,But it still fail.

I found only iPhone suspend and do disconnect(wait a while)-->reconnect several times,and this issue was happened.

[David Edwin]

I assume this is what you did: <Do the ANCS as earlier normally for the initial config then do the work around using open/close remote pipe as below>>

1. Wait for the Pipe Status Event to arrive which says that the ANCS pipes are available.
2. Send the Close Remote Pipe
3. Wait for the Pipe Status that says that the Remote ANCS pipe has closed.
4. Send the Open Remote Pipe
5. Wait for the Pipe Status that says that the Remote ANCS pipe is now open. = Is this what you attempted ?

[Emp2014]

The ANCS has 3 Characteristics("Notification Source","Control Point","Data Source"),

How to work around the Control Point?!