esp32: Scan for wifi networks

[harmon25]

updates network driver to support wifi scanning
includes erlang + elixir examples

These changes are made under both the "Apache 2.0" and the "GNU Lesser General
Public License 2.1 or later" license terms (dual license).

SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later

[UncleGrumpy]

There is already a PR open for this feature. See #1165. Also needed to be able to conduct a scan in #1181. Scanning is only possible when there is no active connection, which is a state our network driver currently does not support, it is always either connected, or attempting to connect.

[harmon25]

I should have checked! Thanks for taking a look - I'll close this.

[UncleGrumpy]

Since this is a feature you are interested in, maybe opening an issue would help speed up getting #1181 and #1165 merged. I have wanted this feature for a long time, but I think since there didn’t seem to be much interest in it, it got pushed to the back burner.

[harmon25]

Here is an issue, thanks @UncleGrumpy !
#2024