Increased BLE security on NRF52832

RE: Increased BLE security on NRF52832

Susheel Nuguru — Fri, 20 Sep 2024 10:46:13 GMT

Everything is linked to CONFIG_BT_MAX_PAIRED, try increasing this value in your prj.conf allowing a larger buffer and see if it helps.

Also if you do not want more space to be allocated, then think about defining CONFIG_BT_KEYS_OVERWRITE_OLDEST

RE: Increased BLE security on NRF52832

Tim Scott — Wed, 18 Sep 2024 15:13:57 GMT

This is the path of function calls to where the error is initially returned before being passed all the way up:
bt_conn_set_security -> start_security -> bt_smp_start_security -> smp_send_security_req

This is the section of code that returns the error:

	if (!conn->le.keys) {
		conn->le.keys = bt_keys_get_addr(conn->id, &conn->le.dst);
		if (!conn->le.keys) {
			return -ENOMEM;
		}
	}

RE: Increased BLE security on NRF52832

Susheel Nuguru — Wed, 18 Sep 2024 07:52:48 GMT

Can you please compile your application with debug options enabled and start the application in debugger and step inside bt_conn_set_security function. It should give you exact context where this error ENOMEM is returned. If you can express that here, we can try to see if we have a configuration option to fix this.