nRF52840 start sending data after bonding

RE: nRF52840 start sending data after bonding

Dani — Wed, 18 Nov 2020 11:16:45 GMT

Finally, I have set both MIN_CONN_INTERVAL and MAX_CONN_INTERVAL to 10ms, and now it's working fine.

RE: nRF52840 start sending data after bonding

Dani — Tue, 17 Nov 2020 14:41:34 GMT

I have also tried to set MIN_CONN_INTERVAL to 10ms, but result is the same: problems to receive all data just after bonding process.

When disconnecting and connecting back again (device already bonded), all data is always correctly received.

RE: nRF52840 start sending data after bonding

Dani — Tue, 17 Nov 2020 10:35:54 GMT

Hi Amanda:

NRF_SDH_BLE_GAP_EVENT_LENGTH 251

gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
gap_conn_params.slave_latency = SLAVE_LATENCY;
gap_conn_params.conn_sup_timeout = CONN_SUP_TIMEOUT;

, where:

#define MIN_CONN_INTERVAL MSEC_TO_UNITS(500, UNIT_1_25_MS) /**< Minimum acceptable connection interval (0.5 seconds). */
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(1000, UNIT_1_25_MS) /**< Maximum acceptable connection interval (1 second). */
#define SLAVE_LATENCY 0 /**< Slave latency. */
#define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS) /**< Connection supervisory timeout (4 seconds). */

I will try to also have a sniffer trace.

Dani

RE: nRF52840 start sending data after bonding

Amanda Hsieh — Tue, 17 Nov 2020 09:23:17 GMT

Hi Dani,

What is the value of the min/max connection interval and the GAP event length?

Could you provide the sniffer trace log?

-Amanda H.

RE: nRF52840 start sending data after bonding

Dani — Mon, 16 Nov 2020 09:26:57 GMT

Hi,

Using the nRF Connect I'm observing the same behaviour:

Once my device is bonded, I send some values through one service. When these data is received in my device, it starts sending all its parameters to the smartphone (one sending every 62.5ms). Through nRF-Connect I have observed that not all data is received first time after device bonding.

Nevertheless, if device is already bonded, when a smartphone connects to device, all these parameters are correctly received and there are not data losses.

Which can be the reason of this?

Dani.

RE: nRF52840 start sending data after bonding

Dani — Fri, 13 Nov 2020 12:26:41 GMT

Hi Amanda,

I will test what you have suggested.

I'm using s140 v6.1.0

Dani.

RE: nRF52840 start sending data after bonding

Amanda Hsieh — Fri, 13 Nov 2020 12:25:03 GMT

Hi Dani,

Which version of the SDK you are using?

Do you test the nRF-Connect-for-mobile with the device?

Please provide the log from nRF-Connect-for-mobile, debug log on the device, and the sniffer trace log recording the behavior.

-Amanda H.