https://devzone.nordicsemi.com/f/nordic-q-a/4443/about-connection-and-bonding-updated-sniffer-trace-postedHi, I am now developing the BLE with our company&#39;s own sensor, so we are not using the motherboard. There always a problem when we use it. I am using the PCA10004 board and the USB Dongle as the master emulator. Every time when I try to bond the deviceen-USTelligent Community 13Wed, 03 Dec 2014 18:07:08 GMThttps://devzone.nordicsemi.com/thread/15782?ContentTypeID=1Wed, 03 Dec 2014 18:07:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:87b1356b-4ecb-463e-976d-82f899f35185morgen<p>Hi, Star Yes,the connection dropped while bonding, there is error and resend request inside the trace. Every time when bonding it usually takes a very long time then link loss. You can see like on 836 line, attribute not found. It is using the sample program of HTS so there should be fine.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/15781?ContentTypeID=1Tue, 02 Dec 2014 12:07:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:282155f9-aa8b-444c-ba4d-26991a23185aDavid Edwin<p>I do not see any issue in the sniffer trace, make sure that the sniffer is placed in between the 2 devices so it gets all the packets. It looks like a normal connection, does the connection suddenly drop ?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/15780?ContentTypeID=1Mon, 17 Nov 2014 18:31:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a1588dd2-1753-4e00-8b69-b5b6dc282b63morgen<p>Hi Star, I only have one dongle and the other board in Dev kit,so the dongle is performed as master so I don&#39;t have an extra one to do sniffer. Can the master control panel give out these information? Thanks for help.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/15779?ContentTypeID=1Thu, 13 Nov 2014 10:37:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bdb9fbd7-8f65-4189-ab0b-35ac0056d738David Edwin<p>Can you post a sniffer trace with the nRF-sniffer tool ?</p><div style="clear:both;"></div>