connection interval error

RE: connection interval error

treTreTo-IoT — Mon, 06 Mar 2023 18:55:23 GMT

Had the same problem. Needed to increase CONN_SUP_TIMEOUT. Seems like CONN_SUP_TIMEOUT > 2*MAX_CONN_INTERVAL

RE: connection interval error

DanisXZ — Fri, 20 Jan 2023 13:59:14 GMT

Hi Joakim,

[quote userid="20690" url="~/f/nordic-q-a/95585/connection-interval-error/405559"]

Do you have a Nordic DK available to test on?

[/quote]

I tested with nRF52 DK and I face the same issue.

SW package:

nRF5_SDK_17.1.0_ddde560\examples\ble_peripheral\ble_app_hrs\pca10040\s132\ses

I changed the code like given below it fails as explained before:

I found that the issue is not happening if MAX_CONN_INTERVAL is less than 2000. But sd_ble_gap_ppcp_set() fails if MAX_CONN_INTERVAL >= 2000

RE: connection interval error

Joakim Jakobsen — Wed, 18 Jan 2023 20:50:25 GMT

Sorry about the delay.

I can't see any issues when testing this myself.

[quote user="DanisXZ"]Custom board based on nRF52810. [/quote]

I haven't tested with the nRF52810. Do you have a Nordic DK available to test on?

Br,
Joakim

RE: connection interval error

DanisXZ — Fri, 13 Jan 2023 14:32:05 GMT

[quote userid="20690" url="~/f/nordic-q-a/95585/connection-interval-error/404838"]

Let me do some further research on the issue and get back to you.

[/quote]

Okay

RE: connection interval error

Joakim Jakobsen — Fri, 13 Jan 2023 14:26:17 GMT

Thanks.

I was concerned that you might violate the below:

* @note If both conn_sup_timeout and max_conn_interval are specified, then the following constraint applies:
*        conn_sup_timeout * 4 > (1 + slave_latency) * max_conn_interval
*        that corresponds to the following Bluetooth Spec requirement:
*        The Supervision_Timeout in milliseconds shall be larger than
*        (1 + Conn_Latency) * Conn_Interval_Max * 2, where Conn_Interval_Max is given in milliseconds.

But it seems that the values are within the allowed values.

Let me do some further research on the issue and get back to you.

The values you listed below (2500/3000/4000) causes the sd_ble_gap_ppcp_set() function to return with the invalid param error?

Br,
Joakim

RE: connection interval error

DanisXZ — Wed, 11 Jan 2023 14:39:10 GMT

Hi Joakim,

Thank you for your reply.

[quote userid="20690" url="~/f/nordic-q-a/95585/connection-interval-error/404361"]

Maybe you could add some more information about your setup? Which device etc.

[/quote]

Custom board based on nRF52810.

SDK 17.1.0

SD112

[quote userid="20690" url="~/f/nordic-q-a/95585/connection-interval-error/404361"]

Have you made any other changes to the example, other than changing the connection interval?

[/quote]

I didn't do any change other than the connection interval. I made change as given below.

#define MIN_CONN_INTERVAL MSEC_TO_UNITS(2500, UNIT_1_25_MS) /**< Minimum acceptable connection interval (0.1 seconds). */
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(3000, UNIT_1_25_MS) /**< Maximum acceptable connection interval (0.2 second). */
#define SLAVE_LATENCY 0 /**< Slave latency. */
#define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS) /**< Connection supervisory timeout (4 seconds). */

I get an error code of 0x7 for sd_ble_gap_ppcp_set() function in gap_params_init();

RE: connection interval error

Joakim Jakobsen — Wed, 11 Jan 2023 14:21:13 GMT

Hi.

I tested the template example and I had no issues changing the min/max connection interval to lower values using nRF5 SDK v.17.1.0.

Maybe you could add some more information about your setup? Which device etc.

Have you made any other changes to the example, other than changing the connection interval?

Br,
Joakim