April 2013 - Bluetooth-dev - lists.apple.com

Re: Save CBCharacteristic to NSUserDefaults
by William Henderson 17 Apr '13

17 Apr '13

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Re: Invalid peripherals returned by CBCentralManager after reconnect?
by Etan Kissling 17 Apr '13

17 Apr '13

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Re: Recommended Packet Sniffer?
by Matt Gillette 17 Apr '13

17 Apr '13

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Re: Save CBCharacteristic to NSUserDefaults
by Arvydas Sidorenko 17 Apr '13

17 Apr '13

> [peripheralManager respondToRequest:request withResult:CBATTErrorInsufficientAuthorization]; William, it is CBATTErrorInsufficientAuthentication which triggers pairing on the central and not CBATTErrorInsufficientAuthorization. On Wed, Apr 17, 2013 at 6:44 PM, William Henderson <william.c.henderson(a)gmail.com> wrote: > I've tested the described caching behavior and can very that it works on iOS > 6.1.3 but does not on Mac OS 10.8.3. > > As mentioned above, caching happens only for paired devices. To pair, you > need to respond to a write request with an insufficient authorization error. > For example, for an iOS peripheral you would write something like: > > - (void)peripheralManager:(CBPeripheralManager *)peripheralManager > didReceiveWriteRequests:(NSArray *)requests { > ... > > [peripheralManager respondToRequest:request > withResult:CBATTErrorInsufficientAuthorization]; > > ... > } > > That will pop up a pairing dialog on the iOS peripheral, after which point > you will be paired. Other than that you don't have to change your code – > just call discoverServices etc as normal and they will respond more quickly > (ie instantly). > > William > > > On Wed, Apr 17, 2013 at 3:17 AM, Etan Kissling <kissling(a)oberon.ch> wrote: >> >> John, >> >> nope, i haven't tested caching / encryption yet. >> >> Etan >> >> On 17.04.2013, at 09:48, John Earl <jearl(a)airsource.co.uk> wrote: >> >> Etan, >> >> This discussion seems to imply that discovered services and >> characteristics can be cached across disconnect/reconnect pairs if the >> application runs continuously in the background, so long as CBCentralManager >> does not power down. >> >> Have you tried this and/or do you use this functionality yourself? >> >> John >> >> On 17 Apr 2013, at 08:14, Etan Kissling wrote: >> >> Jack, >> >> In the mentioned session they explained that characteristics are only >> cached when encryption is on. I haven't tested whether this is true, but may >> be worth trying. >> >> To speed up characteristic discovery, consider lowering the connection >> interval for the first 30 seconds or so from your peripheral. You can do >> this by sending a connection parameter update request. >> >> Also ensure that all your services with 16-bit uuids are grouped at the >> beginning of your peripheral gatt database. This allows to read up to four >> 16-bit uuid services at a time with the default MTU of 23 bytes. >> >> Regarding serialization of cb* objects: it's not possible with public apis >> and even if you could serialize them for nsuserdefaults storage, you would >> still run into problems as the documentation clearly states that all >> peripherals etc are invalidated when the cbcentralmanager state falls below >> a certain level. When you create a new manager, state defaults to "unknown" >> which is the lowest level ;-) >> >> Cheers >> Etan >> >> On 17.04.2013, at 08:34, "Jack Phan" <jackphan02(a)gmail.com> wrote: >> >> Thank you very much for all your comments. >> >> Jack >> >> On Apr 16, 2013, at 11:28 PM, Andras Kovi <allprog(a)gmail.com> wrote: >> >> Well, if you retrieve or discover a peripheral, then its services will be >> nil. Those are read only from our perspective so there is not even a >> theoretical way to save and then restore the characteristics. Maybe they >> come up with some caching this year (WWDC 2013 hasn't happened yet to my >> best knowledge :) ) but I doubt that as that would introduce a whole bunch >> of issues. Rediscovery is not a big deal, you just have to plan for it. >> >> Cheers, >> Andras >> >> On 2013.04.17., at 8:09, Jack Phan <jackphan02(a)gmail.com> wrote: >> >> >> I may be wrong but I remember that in Advanced Core Bluetooth session from >> this years WWDC, they said we could catch the characteristics. >> >> Jack >> >> >> On Apr 16, 2013, at 11:06 PM, Andras Kovi <allprog(a)gmail.com> wrote: >> >> Yes, Khaos is right. You cannot save neither the characteristics or the >> services. They must be rediscovered every time. >> >> Andras >> >> On 2013.04.17., at 7:44, Khaos Tian <khaos.tian(a)gmail.com> wrote: >> >> It seems you had to re-discover characteristics every time you established >> a new connection. >> >> Here are threads that discussed this problem previously. >> >> http://prod.lists.apple.com/archives/bluetooth-dev/2013/Mar/msg00032.html >> >> Best Wishes, >> Khaos Tian >> >> On Apr 17, 2013, at 1:25 PM, Jack Phan <jackphan02(a)gmail.com> wrote: >> >> The reason is that I don't want to scan again. I would like to reconnect >> but don't want to discover characteristics again because it takes too long. >> So when the user opens the app, I reconnect, no discover characteristics, >> but send characteristic values that I had saved to Peripheral. >> >> Jack >> >> On Apr 16, 2013, at 10:14 PM, Khaos Tian <khaos.tian(a)gmail.com> wrote: >> >> sorry for the typo. >> >> I mean why don't you perform a discover characteristics action and then >> use that CBCharacteristic to perform action you want? >> >> Best Wishes, >> Khaos Tian >> >> On Apr 17, 2013, at 1:06 PM, Jack Phan <jackphan02(a)gmail.com> wrote: >> >> >> Hi Khaos, >> >> Yes. I would like to save CBCharacteristic *myChar into NSUserDefauts and >> then load it when user open the app. >> Thanks, >> >> Jack >> >> >> On Apr 16, 2013, at 10:02 PM, Khaos Tian <khaos.tian(a)gmail.com> wrote: >> >> May I ask why would you like to say CBCharacteristic into NSUserDefaults? >> >> Best Wishes, >> Khaos Tian >> >> On Apr 17, 2013, at 12:56 PM, Jack Phan <jackphan02(a)gmail.com> wrote: >> >> Hi Group, >> >> I'm working on a project for iPhone (Central) with TI CC2541 (Peripheral) >> and would like to save a CBCharacteristic *myChar to NSUserDefaults but I >> don't know how. >> Please give me a way to solve this. It's great if you could share your >> code for it. >> >> Thanks a lot, >> >> Jack >> _______________________________________________ >> Do not post admin requests to the list. They will be ignored. >> Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) >> Help/Unsubscribe/Update your Subscription: >> >> https://lists.apple.com/mailman/options/bluetooth-dev/khaos.tian%40gmail.com >> >> This email sent to khaos.tian(a)gmail.com >> >> >> >> >> >> >> _______________________________________________ >> Do not post admin requests to the list. They will be ignored. >> Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) >> Help/Unsubscribe/Update your Subscription: >> https://lists.apple.com/mailman/options/bluetooth-dev/allprog%40gmail.com >> >> This email sent to allprog(a)gmail.com >> >> >> >> >> >> _______________________________________________ >> Do not post admin requests to the list. They will be ignored. >> Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) >> Help/Unsubscribe/Update your Subscription: >> https://lists.apple.com/mailman/options/bluetooth-dev/kissling%40oberon.ch >> >> This email sent to kissling(a)oberon.ch >> >> _______________________________________________ >> Do not post admin requests to the list. They will be ignored. >> Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) >> Help/Unsubscribe/Update your Subscription: >> >> https://lists.apple.com/mailman/options/bluetooth-dev/jearl%40airsource.co.… >> >> This email sent to jearl(a)airsource.co.uk >> >> >> >> >> _______________________________________________ >> Do not post admin requests to the list. They will be ignored. >> Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) >> Help/Unsubscribe/Update your Subscription: >> >> https://lists.apple.com/mailman/options/bluetooth-dev/william.c.henderson%4… >> >> This email sent to william.c.henderson(a)gmail.com >> > > > > -- > William > Sent from my iPhone > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/bluetooth-dev/asido4%40gmail.com > > This email sent to asido4(a)gmail.com > _______________________________________________ Do not post admin requests to the list. They will be ignored. 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Re: Recommended Packet Sniffer?
by Etan Kissling 17 Apr '13

17 Apr '13

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Re: Invalid peripherals returned by CBCentralManager after reconnect?
by Etan Kissling 17 Apr '13

17 Apr '13

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Recommended Packet Sniffer?
by Gareth MacLeod 17 Apr '13

17 Apr '13

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Re: Save CBCharacteristic to NSUserDefaults
by William Henderson 17 Apr '13

17 Apr '13

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Re: Invalid peripherals returned by CBCentralManager after reconnect?
by Anthony Stevens 17 Apr '13

17 Apr '13

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Re: Invalid peripherals returned by CBCentralManager after reconnect?
by Etan Kissling 17 Apr '13

17 Apr '13

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