nRF51822(peripheral role): How to Update connection parameter?

RE: nRF51822(peripheral role): How to Update connection parameter?

Artem Zemlyanukhin — Wed, 18 Sep 2013 07:17:07 GMT

Thanks for fast response!

RE: nRF51822(peripheral role): How to Update connection parameter?

Carles — Wed, 18 Sep 2013 07:01:15 GMT

Those are internal Master Control Panel messages and are not relevant to your application or the BLE connection, you can safely ignore them.

RE: nRF51822(peripheral role): How to Update connection parameter?

Artem Zemlyanukhin — Wed, 18 Sep 2013 06:18:42 GMT

Hi,

could you tell me please what do the following events mean?

3055;11:45:49.4300 [480100137] PacketQueueSearch skipped event code 0x0D 3056;11:45:49.4300 [480100137] PacketQueueSearch skipped event code 0x96

RE: nRF51822(peripheral role): How to Update connection parameter?

Ole Morten — Mon, 09 Sep 2013 05:55:07 GMT

As you can see in the comment on this field in the struct definition, setting it to NULL means that the module will go fetch the parameters from the stack: "Pointer to the connection parameters desired by the application. When calling ble_conn_params_init, if this parameter is set to NULL, the connection parameters will be fetched from host."

Also, take a look at lines 107-126 in ble_conn_params.c, where you can see how this is done.

I'm therefore still confident this is the cause of the behavior you're seeing.

RE: nRF51822(peripheral role): How to Update connection parameter?

bayi255 — Sun, 08 Sep 2013 22:20:06 GMT

But Most of the SDK examples ble_conn_params_init(): cp_init.p_conn_params = NULL; not set connect interval!, then must other function do this.

/**@brief Initialize the Connection Parameters module. */ static void conn_params_init(void) { uint32_t err_code; ble_conn_params_init_t cp_init;

memset(&cp_init, 0, sizeof(cp_init));

cp_init.p_conn_params = NULL; cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY; cp_init.next_conn_params_update_delay = NEXT_CONN_PARAMS_UPDATE_DELAY; cp_init.max_conn_params_update_count = MAX_CONN_PARAMS_UPDATE_COUNT; cp_init.start_on_notify_cccd_handle = BLE_GATT_HANDLE_INVALID; cp_init.disconnect_on_fail = false; cp_init.evt_handler = on_conn_params_evt; cp_init.error_handler = conn_params_error_handler;

err_code = ble_conn_params_init(&cp_init); APP_ERROR_CHECK(err_code); }

RE: nRF51822(peripheral role): How to Update connection parameter?

Ole Morten — Fri, 06 Sep 2013 06:21:18 GMT

This obviously shows that your application is sending another connection parameter update request. Most of the SDK examples include the ble_conn_params module, that can handle such update requests for you. I therefore suspect that it's this module that sends the second request.

To solve it, you can either make ble_conn_params request the parameters you actually want by modifying the parameters passed to ble_conn_params_init(), or just remove the entire module and handle it yourself.