sd_ble_gatts_hvx returns 13313 (rarely)

RE: sd_ble_gatts_hvx returns 13313 (rarely)

WrightLin.Avnet — Tue, 08 Oct 2019 09:01:48 GMT

Hi Andy:

Sorry to ask here, but do you have any idea about the situation that error code 8 was feedback from sd_ble_gatts_sys_attr_set() in BLE connected event?

RE: sd_ble_gatts_hvx returns 13313 (rarely)

Andy — Wed, 05 Jun 2019 12:55:37 GMT

What results in error code 8 (invalid state)?

The documentation is here:

sd_ble_gatts_hvx() and sd_ble_gatts_sys_attr_set().

RE: sd_ble_gatts_hvx returns 13313 (rarely)

Daniel Reisfeld — Wed, 05 Jun 2019 12:46:55 GMT

Andy,

This results in return code 8.

I haven't found relevant documentation.

Please advise,

Daniel

RE: sd_ble_gatts_hvx returns 13313 (rarely)

Andy — Wed, 05 Jun 2019 08:13:11 GMT

[quote userid="67166" url="~/f/nordic-q-a/48189/sd_ble_gatts_hvx-returns-13313-rarely"]1. What this return code means?[/quote]

It means the system attributes are missing. You can see that in the documentation.

[quote userid="67166" url="~/f/nordic-q-a/48189/sd_ble_gatts_hvx-returns-13313-rarely"]2. What is the recommended way to recuperate when it happens?[/quote]

Just do this:

err_code = sd_ble_gatts_hvx(conn_handle, &hvx_params);

if (err_code == BLE_ERROR_GATTS_SYS_ATTR_MISSING) {
	err_code = sd_ble_gatts_sys_attr_set(conn_handle, NULL, 0, 0);
	APP_ERROR_CHECK(err_code);
	
	// Try again
	err_code = sd_ble_gatts_hvx(conn_handle, &hvx_params);
}

[quote userid="67166" url="~/f/nordic-q-a/48189/sd_ble_gatts_hvx-returns-13313-rarely"]3. Is there a way to avoid it?[/quote]

Set the system attributes beforehand.