* Uniform timeout WiFiClient-WiFiClientSecure

* Added missing prototype

* Add socket check on setTimeout

Summary

The examples demonstrate how to create a WPA2 Enterprise connection, but it requires using various direct esp_idf functions. This patch is intended to create another overloaded version of the WiFi.begin() function that allows a user to create a WPA2 Enterprise connection in much the same way as different kinds of connections.

My only question for the core maintainers is whether I should leave those #ifdef's in there. I added them so that it was easy to disable all the code I added via defines from my platformio.ini file, but they technically aren't necessary.

Impact

This should make it easier for novice users to create WPA2 Enterprise connections. For my university, I didn't need a root certificate or the client certificate or client key, so I haven't been able to debug those scenarios, but I built the begin functions to allow any one of those to be used, if needed.

I can confirm that eduroam-style WPA2 Enterprise networks that only require authentication with a username and password works as expected.

* Fixes DHCP Server Lease Range for any AP Server Static IP Address

* Fixes DHCP in APMode when Static IP is out of subnet range

Added dual antenna configuration based on the module selection
Added warning to the example on how to use the DA

Fixes: https://github.com/espressif/arduino-esp32/issues/6264
Thanks @Spritetm

* Added dual antenna for WiFi (based on the ESP32-WROOM-DA module)

* Fixed build error

* Fixed indentation and renamed function to setDualAntennaConfig

* Added the RX and TX selection modes as configuration

* Mode code optimization

Reliability fix for autoReconnect when assoc_fail, autoReconnect did not work before for these failures.

Changes behavior of WIFI_REASON_ASSOC_FAIL event when autoReconnect is set, removes WIFI_REASON_ASSOC_FAIL/WL_CONNECT_FAILED so retry waitforconnectresult loop stays active for the retry, was not working before.

Fixes: https://github.com/espressif/arduino-esp32/issues/6020

1.0.6 changed scanning method to always scan all available channels during connect. This results in results in connect taking about ~3 seconds instead of ~1. This patch changes the behavior to use WIFI_FAST_SCAN if client used a specific channel.

When using the FTM examples I got an error in the FTM_Initiator.ino:

*"wifi:channel=0 is invalid"*

I solved it for myself by simply passing the channel argument to be 1 in *WiFi.initiateFTM*. However, a better fix would be to directly change the default channel here.

* examples: WiFi and Ethernet examples organization

* examples: Change on CI scripts to include new folder

* Library name reverted to WiFi

* examples: WiFi and Ethernet examples organization in a new folder

* examples: Eth files moved from WiFi to Ethernet lib and CMakeLists updated

Summary

Modifies WiFi lib to allow dynamic buffer allocation along with SPIRAM MALLOC enabled
This gives more heap space to the users

Related PR in Arduino Lib Builder: espressif/esp32-arduino-lib-builder#47

Impact

WiFi will work the same as it was in version 1.0.6, restoring free heap.

close #5630
close #5474
close #5699
close #5697

only use ksz8081 for idf versions later than 4.3 (this fixes compile as component for idf 4.3) (#5599)

esp_eth_phy_new_ksz8081 was added in IDF after version 4.3 and generates a compilation error with IDF-4.3. This change will only use esp_eth_phy_new_ksz8081 for IDF versions after 4.3

* Fix issue #5507 "Constructor WebServer::WebServer(IPAddress addr, int port) produces an unexpected result"

"The class Webserver is declared with two explicit constructors, one with signature:
WebServer::WebServer(IPAddress addr, int port)
Using this results in a server listening on the port number obtained by converting the value of the IPAddress addr argument (in host byte order) to a uint32_t and then to a uint16_t, which is manifestly not the result that would be expected.
...
As for a fix, we can assume from these results that this constructor is not being used and therefore could simply be deleted."

* Issue 5507
Reverse changes in commit bee1e7088cef913391155f096b42cd4bb89c5c6f after discussion.
Alternative fix to be done.

* Fix issue #5507 "Constructor WebServer::WebServer(IPAddress addr, int port) produces an unexpected result"

This change adds support for multi-homed servers to libraries/WiFi.  It was assumed to be there already by libraries/WebServer, but was not.
This led to unexpected results when the IP address-specific constructor of class WebServer was used (see issue 5507).

This change was tested using three concurrent instances of WebServer, one bound to the WiFi station address, one bound to the WiFi soft AP address,
and one bound to INADDR_ANY.  See libraries/WebServer/examples/MultiHomedServers for the test method.

* Fix issue #5507 "Constructor WebServer::WebServer(IPAddress addr, int port) produces an unexpected result" (cont.)
This fixes what I think might be the cause of CI failures on GitHub for the previous commit, namely the absence of an include file
in examples/MultiHomedServers.

* Fix issue #5507 "Constructor WebServer::WebServer(IPAddress addr, int port) produces an unexpected result" (cont.)

Change port numbers in examples/MultiHomedServers per pull-request comment from me-no-dev ...
"for this test to be valid, both servers should be on the same port. That is how you can make sure that the functionality works."

## Summary
https://github.com/espressif/arduino-esp32/pull/5487 introduced a default timeout for WiFiClient, however the default was specified in milliseconds instead of seconds, see https://github.com/espressif/arduino-esp32/commit/be84c8219c251210afd87cac71b8ef3527b601b3#commitcomment-54358731
This 3ms timeout breaks OTA when the processor is busy.

## Impact
Sets the default to a saner value, fixes OTA.

## The problem
WiFiClient's connect method variant where no timeout is passed can block esp32 MCU and may then cause watchdog to kick in and reset the device. This behavior is different from that, what is in arduino-esp8266 core.

## Summary
Some cross-esp libraries (working both on esp32 and 8266), like PubSubClient simply call connect method on WiFiClient, to get connected to remote server. However, connect behavior varies betwen esp arduino 8266 and esp arduino 32 cores. This pull request tries introduce same behavior - to make connect method non-blocking on esp32, like it is with 8266 arduino core.

## Proposed solution
Introduce default fixed timeout that can be changed by #define - by default set to 3 seconds.

### Affected components: 
WiFiClient

### Affected methods:
```c++ 
int connect(IPAddress ip, uint16_t port);
int connect(const char *host, uint16_t port);
```

### Impact
May impact projects or libraries using connect method variant without specified timeout, where:
- remote is located far away or
- connection is heavily limited, or
- remote is slow, when it comes to accept the connection

Fixes: https://github.com/espressif/arduino-esp32/issues/4842

* Update toolchain

* Update package_esp32_index.template.json

* add optional component dependencies after Kconfig options are known (#5404)

Until this commit, Kconfig options (e.g. CONFIG_TINYUSB_ENABLED) were
used in conditions preceding idf_component_register to determine which
components need to be added to `arduino` component requirements.
However the Kconfig options aren't known at the early expansion stage,
when the component CMakeLists.txt files are expanded the first time
and requirements are evaluated. So all the conditions evaluated as if
the options were not set.
This commit changes the logic to only add these components as
dependencies when the Kconfig options are known. Dependencies become
"weak", which means that if one of the components isn't included into
the build for some reason, it is not added as a dependency.
This may happen, for example, if the component is not present in the
`components` directory or is excluded by setting `COMPONENTS` variable
in the project CMakeLists.txt file.
This also ensures that if the component is not present, it will not be
added as a dependency, and this will allow the build to proceed.

Follow-up to https://github.com/espressif/arduino-esp32/pull/5391.
Closes https://github.com/espressif/arduino-esp32/issues/5319.

* IDF master d93887f9f

* PlatformIO updates for CI (#5387)

* Update PlatformIO CI build script

- Switch to the latest toolchains 8.4.0 for ESP32, ESP32S2, ESP32C3
- Use PlatformIO from master branch for better robustness

* Update package.json for PlatformIO
Co-authored-by: NIvan Grokhotkov <ivan@espressif.com>
Co-authored-by: NValerii Koval <valeros@users.noreply.github.com>

Commit d15e1b0e [1] in the 2.0.0 pull request #4996 introduced a filter
to connect only to WiFi networks with a RSSI of -75 or better. This
results in strage behaviour, as a scan still shows networks, that can't
be connected to, even though with older versions, connecting to those
networks was possible and the connection (albeit slow) was stable.

Remove the RSSI filter for now by setting the threshold to -127, i.e.
the lowest possible value. Maybe in the future the filter threshold
could be exposed to users, to allow filtering out nearly unreachable
networks.

[1] github.com/espressif/arduino-esp32/pull/4996/commits/d15e1b0e

* Add back ARDUINO_EVENT_WIFI_READY

Fixes: https://github.com/espressif/arduino-esp32/issues/5315

* use strncpy and strncmp for WiFi SSID and Password in AP and STA

Fixes: https://github.com/espressif/arduino-esp32/issues/5367

* Implement timeout for waitForConnectResult

Fixes: https://github.com/espressif/arduino-esp32/issues/5330

* Remove old definition of "reverse" from stdlib_noniso

Fixes: https://github.com/espressif/arduino-esp32/issues/5045

* Make "reverse" noniso conditional on ESP_DSP

Rework of #5266 by @pedrominatel

fixes #5239

* Add back clock mode argument

When iterating through APlist from first to the last element, a corrected password for already known SSID is not used. Therefore, I propose to iterate from the back of the list. With iterating from the back through the vector, an already known SSID with a corrected password is used instead.

fixes #5115

fixes #4805

Thi may happen if read() gets called repeatedly (such as in HttpClient to parse response headers) and the connection is closed unexpectedly or the remote peer may have unexpected behavior that causes the underlying socket to report an error. In that case read() itself calls stop(), which invalidates the receive buffer object. Then when read() is called again without checking, such as inside readStringUntil(), the _rxBuffer is null and ESP32 crashes.

* AP with old WPA should not be used due security flaws.
* restore behavior from 1.0.6, see https://github.com/espressif/arduino-esp32/blob/46d5afb17fb91965632dc5fef237117e1fe947fc/libraries/WiFi/src/WiFiAP.cpp#L127

This adds support for the KSZ8081 ethernet phy.
Only the IDF 4+ specific code is modified, as the phy support was only
added recently:
espressif/esp-idf@aecfbf96

This is very much still work in progress and much more will change before the final 2.0.0

Some APIs have changed. New libraries have been added. LittleFS included.
Co-authored-by: NSeon Rozenblum <seonr@3sprockets.com>
Co-authored-by: NMe No Dev <me-no-dev@users.noreply.github.com>
Co-authored-by: Ngeeksville <kevinh@geeksville.com>
Co-authored-by: NMike Dunston <m_dunston@comcast.net>
Co-authored-by: NUnexpected Maker <seon@unexpectedmaker.com>
Co-authored-by: NSeon Rozenblum <seonr@3sprockets.com>
Co-authored-by: NmicroDev <70126934+microDev1@users.noreply.github.com>
Co-authored-by: Ntobozo <tobozo@users.noreply.github.com>
Co-authored-by: Nbobobo1618 <bobobo1618@users.noreply.github.com>
Co-authored-by: Nlorol <lorolouis@gmail.com>
Co-authored-by: Ngeeksville <kevinh@geeksville.com>
Co-authored-by: NLimor "Ladyada" Fried <limor@ladyada.net>
Co-authored-by: NSweety <switi.mhaiske@espressif.com>
Co-authored-by: NLoick MAHIEUX <loick111@gmail.com>
Co-authored-by: NLarry Bernstone <lbernstone@gmail.com>
Co-authored-by: NValerii Koval <valeros@users.noreply.github.com>
Co-authored-by: N快乐的我531 <2302004040@qq.com>
Co-authored-by: Nchegewara <imperiaonline4@gmail.com>
Co-authored-by: NClemens Kirchgatterer <clemens@1541.org>
Co-authored-by: NAron Rubin <aronrubin@gmail.com>
Co-authored-by: NPete Lewis <601236+lewispg228@users.noreply.github.com>

Fixes: https://github.com/espressif/arduino-esp32/issues/3218

Fixes: https://github.com/espressif/arduino-esp32/issues/4778

added scan_method = WIFI_ALL_CHANNEL_SCAN into wifi config in WiFi.begin() to let the scan choose the nearest / strongest AP in case that there are multiple APs with the same SSID (#4947)

In case you have multiple APs with the same SSID/password and WiFi.begin(ssid, pwd) is called, ESP32 defaults to connect to THE FIRST AP FOUND matching ssid - according to:
https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/network/esp_wifi.html#_CPPv418wifi_scan_method_t

This can cause situations that ESP32 is trying to connect to AP which is far away from it (weak signal) even there is AP close to it, just as in my house - I have AP on channel 6 which is in the 1st floor (quite far from room where I do the programming) and AP on channel 13 in the same room I do the programming (which is in the 2nd floor) - result: ESP32 is trying to connect to the AP on channel 6 because it finds it first and never try the AP on channel 13 in the same room, result of this is very unreliable WiFi connection.

When scan_method is set to WIFI_ALL_CHANNEL_SCAN, ESP32 scans all channels and choose the nearest / strongest AP (matching the ssid of course) as expected - result is no connection problems at all.

Therefore I propose adding this parameter into WiFi.begin, connection problems as described above are quite confusing (especially for beginners), I can imagine that for example Schools there are usually using mutliple APs and this can cause intermittent connection problems without obvious reason.

a little step to make esp8266 code compile without changes under esp32

Fixes: https://github.com/espressif/arduino-esp32/issues/4922