Connect with Autoconnect on Central

RE: Connect with Autoconnect on Central

user102664 — Wed, 25 May 2022 16:03:41 GMT

I am still not able to get extended advertising to work but I was able to get it to work using bt_le_filter_accept_list_add on both the central and peripheral bond addresses to filter connectable addresses.

On the central I was then able to use bt_conn_le_create_auto to create an automatic reconnect connection.

RE: Connect with Autoconnect on Central

user77782 — Wed, 25 May 2022 11:26:41 GMT

Hi,

I would try to use bt_le_ext_adv_start. Take a look at the example in this post.

-Amanda

RE: Connect with Autoconnect on Central

user102664 — Tue, 24 May 2022 16:02:00 GMT

Hello,

I've added the config option CONFIG_BT_EXT_ADV to my peripheral prj.conf added CONFIG_BT_CTLR_ADV_EXT=y to child_image/hci_rpmsg.conf

I have also tried adding BT_LE_ADV_OPT_EXT_ADV to the options which caused an -EINVAL error which was strange since when the config option is enabled, bt_le_adv_start_ext is always called not bt_le_adv_start_legacy.

I traced this error back to bt_le_adv_start_ext calling valid_adv_param instead of valid_adv_ext_param which seems like a bug. Therefore I also applied the following patch which fixes the -EINVAL error.

diff --git a/subsys/bluetooth/host/adv.c b/subsys/bluetooth/host/adv.c
index ecd0de3371..df35e5d6f6 100644
--- a/subsys/bluetooth/host/adv.c
+++ b/subsys/bluetooth/host/adv.c
@@ -1223,7 +1223,7 @@ int bt_le_adv_start_ext(struct bt_le_ext_adv *adv,
 		return -EAGAIN;
 	}
 
-	if (!valid_adv_param(param)) {
+	if (!valid_adv_ext_param(param)) {
 		return -EINVAL;
 	}

When testing this configuration with the mobile app, I cannot find the device listed. Only when I remove BT_LE_ADV_OPT_EXT_ADV and use the following as a adv does it show up during scan.

adv_param = *BT_LE_ADV_CONN;
adv_param.options |= BT_LE_ADV_OPT_ONE_TIME;

err = bt_le_adv_start(adv_param,
		      ad, ARRAY_SIZE(ad),
		      sd, ARRAY_SIZE(sd));

However now it seem the issue is when connecting, a bus fault is generated in the kernel work.c flag_clear() function. This also occurs without the patch.

RE: Connect with Autoconnect on Central

user77782 — Tue, 24 May 2022 13:19:56 GMT

Hi,

[quote user=""]When attempting to do the same on an embedded central scanning for the address and connecting to a match I cannot connect to a directed advertisement. However, I can get the central scanning in address filtered mode to connect to a peripheral advertising in regular mode that uses the following advertisement:[/quote]

This post might help.

Regards,
Amanda