Peripheral fails to establish connection with certain parametershttps://devzone.nordicsemi.com/f/nordic-q-a/43942/peripheral-fails-to-establish-connection-with-certain-parametersHi, I am using the nRF52840 on a custom board with SDK15.2.0 with SD S140 6.1.1. My current BLE connection parameters are below which allow connection to the nRF Connect app and my custom Android and iOS app. Min Connection Interval en-USTelligent Community 13Thu, 21 Feb 2019 13:57:23 GMTRE: Peripheral fails to establish connection with certain parametershttps://devzone.nordicsemi.com/thread/172317?ContentTypeID=1Thu, 21 Feb 2019 13:57:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:35deb8a3-d361-43c8-ad9e-f19b57a09f71Joakim Jakobsen<p>Maybe you could upload the sniffer trace, so that I can take a look at it?</p><div style="clear:both;"></div>RE: Peripheral fails to establish connection with certain parametershttps://devzone.nordicsemi.com/thread/172103?ContentTypeID=1Wed, 20 Feb 2019 12:28:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:584e3b00-1561-4f08-8b16-03ac2dce2dd2RPDben<p>I have sniffed the connection and it just&nbsp;stops. There are no HCI events or similar picked up by the sniffer. I don&#39;t know if iOS has an HCI log facility unfortunately</p><div style="clear:both;"></div>RE: Peripheral fails to establish connection with certain parametershttps://devzone.nordicsemi.com/thread/172099?ContentTypeID=1Wed, 20 Feb 2019 12:14:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3562bbc0-9b34-4060-9c68-22fe4ba99238awneil<p>With Android, there is a BLE HCI log which you can look at to see what&#39;s going on - does iOS have a similar facility?</p> <p>What event(s) are you seeing at the peripheral side?</p><div style="clear:both;"></div>