https://devzone.nordicsemi.com/f/nordic-q-a/89746/slow-data-transfer-rate-in-bonded-connection---nrf52832-custom-boardHello, I have been working on a project that uses nrf52832 custom board. Recently, I have been trying to implement device bonding and realized that the data transfer rate drops significantly when the device is bonded with a central device (i.e., iPhoneen-USTelligent Community 13Fri, 08 Jul 2022 07:19:31 GMThttps://devzone.nordicsemi.com/thread/376114?ContentTypeID=1Fri, 08 Jul 2022 07:19:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1e47d6f6-5a1e-4c08-82eb-8f24bf3492c3Simonr<p>Hi</p> <p>Can you provide some more details here. How much does the data rate drop? The data rate shouldn&#39;t drop as a direct consequence of bonding, so there is likely some MTU update of some kind that lowers the data rate for some reason. What application are you running on the iPhone/Android, and what does your nRF application do.&nbsp;</p> <p>It might help if you could do a sniffer trace of the application so we can see what is happening on air when doing pairing. If you have a spare Development Kit you can use that as the sniffer with Wireshark and the <a href="https://infocenter.nordicsemi.com/topic/ug_sniffer_ble/UG/sniffer_ble/intro.html">nRF Sniffer for Bluetooth LE</a>, or use a dedicated sniffer.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>