connection terminated under android 6 after 10 seconds

RE: connection terminated under android 6 after 10 seconds

schoensn — Fri, 11 Mar 2016 12:30:23 GMT

here are the connection parameter for the peripheral:

    #define MIN_CONN_INTERVAL               MSEC_TO_UNITS(7.5, UNIT_1_25_MS)
#define MAX_CONN_INTERVAL               MSEC_TO_UNITS(7.5, UNIT_1_25_MS)
#define SLAVE_LATENCY                   10                              
#define CONN_SUP_TIMEOUT                MSEC_TO_UNITS(3000, UNIT_10_MS)

the connection parameter update of the peripheral is rejected by the central and LL_TERMINATE_IND is sent by the central..

I think I have found the reason.. see my answer below. I have to test it, if the connection parameters are accepted, when i change the connection parameters. I will post my results then.

RE: connection terminated under android 6 after 10 seconds

FormerMember — Fri, 11 Mar 2016 10:30:33 GMT

Which device transfer the LL_TERMINATE_IND packet?

What are the connection parameters (set in the code) for the peripheral and central, respectively?

Could you upload the sniffer trace here?

RE: connection terminated under android 6 after 10 seconds

schoensn — Fri, 11 Mar 2016 10:23:55 GMT

I think I have found the reason, why the connection parameters are rejected..

regarding this post on stackoverflow

android 6 does not accept a connection interval < 11.25 ms. I will test this and share my results.

RE: connection terminated under android 6 after 10 seconds

schoensn — Fri, 11 Mar 2016 09:36:26 GMT

yes i have a dongle and i have captured the packets..

the connection is terminated with the control pdu "LL_TERMINATE_IND" Error Code 0x3b --> "Unnaccaptable Connection Parameters"

RE: connection terminated under android 6 after 10 seconds

FormerMember — Thu, 10 Mar 2016 13:28:03 GMT

Do you have a nRF51-DK or a nRF51-Dongle? If so, could you use the sniffer to track what is being transferred over the air? The sniffer should be used with Wireshark, and it works best with version 1.10, not one of the newer versions, this answer links to older version of wireshark.