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Re: Any better solutions to BLE caching?
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Re: Any better solutions to BLE caching?

  • Subject: Re: Any better solutions to BLE caching?
  • From: Louis Gerbarg <email@hidden>
  • Date: Fri, 19 Apr 2013 19:16:40 -0400
On Fri, Apr 19, 2013 at 5:07 PM, Rick Mann <email@hidden> wrote:

On Apr 19, 2013, at 02:36 , Etan Kissling <email@hidden> wrote:

> Did not test this, but if it works, you should get a callback in the CBPeripheralDelegate (didInvalidateServices or something similar).

So, there's no such delegate method, but I think the thing to do is get the value change indication for that specific characteristic. I'll try to implement that, and hopefully the caching won't prevent that characteristic from showing up.

The method is  -[CBPeripheralDelegate peripheralDidInvalidateServices :], and it was added in iOS 6.0. Not only is it called, but if your peripheral updates a GAP Service Changed characteristic and the app does not implement it you get a console message.

While this is a somewhat workable solution to the problem at hand, it is still a poor solution. The inability to reset the state of the BT devices for testing (clearing the UUID mappings, deleting cached properties, etc) makes testing very difficult.

Louis
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References: 
 >Any better solutions to BLE caching? (From: Rick Mann <email@hidden>)
 >Re: Any better solutions to BLE caching? (From: Gareth MacLeod <email@hidden>)
 >Re: Any better solutions to BLE caching? (From: Etan Kissling <email@hidden>)
 >Re: Any better solutions to BLE caching? (From: Rick Mann <email@hidden>)

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