subscribing to a characteristic after connection establishment takes 3-4 seconds, how to fasten this?https://devzone.nordicsemi.com/f/nordic-q-a/111831/subscribing-to-a-characteristic-after-connection-establishment-takes-3-4-seconds-how-to-fasten-thisHi Is there a way to do this quicker? I have my own custom characteristics. Is it like bonding will imrpove this? Atleast for the case of a reconnection? Is it bonding which would fasten this up? Thxen-USTelligent Community 13Tue, 11 Jun 2024 07:46:35 GMTRE: subscribing to a characteristic after connection establishment takes 3-4 seconds, how to fasten this?https://devzone.nordicsemi.com/thread/488232?ContentTypeID=1Tue, 11 Jun 2024 07:46:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:69b8e87b-6fd6-4b66-8e48-fdc371c945f4Sigurd[quote user="klaus1234"]Actually I figured out that when I : in windows do a search and pair the device, then in python I can subscribe to the characteristic in about a second.[/quote] <p>That makes sense, if you bond, then you don&#39;t need to do the service discovery on every re-connection.</p> [quote user="klaus1234"]Is there a flag in prj.conf (nrf connect sdk 2.6.0) which makes windows ask to pair upon first connection? Something like &quot;CONFIG_PAIRING=y&quot;?[/quote] <p>No, not directly. But if you have some characteristics that require security, the GATT client will typically request pairing during/after initial service discovery.&nbsp; I also recommend this dev-academy:</p> <p><a href="https://academy.nordicsemi.com/courses/bluetooth-low-energy-fundamentals/lessons/lesson-5-bluetooth-le-security-fundamentals/">https://academy.nordicsemi.com/courses/bluetooth-low-energy-fundamentals/lessons/lesson-5-bluetooth-le-security-fundamentals/</a></p> <p></p> <p></p><div style="clear:both;"></div>RE: subscribing to a characteristic after connection establishment takes 3-4 seconds, how to fasten this?https://devzone.nordicsemi.com/thread/487683?ContentTypeID=1Thu, 06 Jun 2024 10:09:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9f8b1211-d4a3-4a15-8972-97ce5cb01d57klaus1234<p>Probably no need to analyze my trace anymore</p> <p>Actually I figured out that when I : in windows do a search and pair the device, then in python I can subscribe to the characteristic in about a second.</p> <p>Is there a flag in prj.conf (nrf connect sdk 2.6.0) which makes windows ask to pair upon first connection? Something like &quot;CONFIG_PAIRING=y&quot;?</p><div style="clear:both;"></div>RE: subscribing to a characteristic after connection establishment takes 3-4 seconds, how to fasten this?https://devzone.nordicsemi.com/thread/487553?ContentTypeID=1Wed, 05 Jun 2024 14:42:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b10544f7-fc47-4f62-ad01-bc448a35f70cklaus1234<p>Hi</p> <p>wow thanks for the offer to look into a trace. Thas nice</p> <p></p> <p><a href="https://devzone.nordicsemi.com/cfs-file/__key/communityserver-discussions-components-files/4/for_5F00_devzone.pcapng">devzone.nordicsemi.com/.../for_5F00_devzone.pcapng</a></p><div style="clear:both;"></div>RE: subscribing to a characteristic after connection establishment takes 3-4 seconds, how to fasten this?https://devzone.nordicsemi.com/thread/487489?ContentTypeID=1Wed, 05 Jun 2024 11:28:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:722799a3-5f55-4059-bb76-3dd4877760fcSigurd<p>Hi!</p> <p>Do you have sniffer trace of this? That would be helpful to look at in this case.</p> <p><a href="https://www.nordicsemi.com/Products/Development-tools/nrf-sniffer-for-bluetooth-le">https://www.nordicsemi.com/Products/Development-tools/nrf-sniffer-for-bluetooth-le</a></p><div style="clear:both;"></div>