Summary

Only affects ETH (not WiFi)

This PR solves #5733 by allowing the DHCP IDF server to complete its tasks and only then it sets a static IP.
This also solves another related failure reported in this issue (#5733 (comment)).

fix #5733

Impact

Adds a delay in order to wait for DHCP to actually terminate before setting the static IP configuration in ETH.

* Re-add with clean master

* Address @me-no-dev's comments

* static_cast<size_t> to static_cast<uint8_t>

Added an option for using precompiled libraries.

Empty if there is no precompilation.

```
compiler.libraries.ldflags=
```

Compiler Message when there is precompilation.

```
Compiling libraries...
Compiling library "aquestalk-esp32"
Library aquestalk-esp32 has been declared precompiled:
Using precompiled library in C:\Users\tanaka\Documents\Arduino\libraries\aquestalk-esp32\src\esp32
```

The precompiler cannot be used because it is not set up now.

* [FEATURE]  ARDUINO_PARTITION_xxx build flag

Proposition: adding `-DARDUINO_PARTITION_{build.partitions}` flag to make the build partition information available at compile time.

Use cas example:

```C
#if defined ARDUINO_PARTITION_default
  // prevent compilation
  #error "This sketch needs 'Minimal SPIFFS' partition scheme to compile" 
  // or disable sketch features that need flash space
  #define USE_HUGE_BITMAP_IMAGES false
#endif
```

* Adding -DARDUINO_PARTITION_{build.partitions} (see #5804)

Fixes: https://github.com/espressif/arduino-esp32/issues/5818

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

* Added I2C driver docs
docs: Changes on the images and added more details about the I2C slave

* docs: Added slaveWrite description and added docs build folder to the gitignore file

* docs: Added useStaticBuffers function description

* docs: Default useStaticBuffers configuration in highlight

if (1) log_e("error") produces a warning ("missing braces") and probably wrong code if no log level is defined.
This fixes that.

The client always appends "Basic" to the authorization header, however there are other auth schemes that can be used: https://developer.mozilla.org/en-US/docs/Web/HTTP/Authentication
For example "Bearer" when using OAuth.
This PR adds a `setAuthorizationType` method to the HTTPClient which allows this scheme to be configured by the caller. Authorization type is set to "Basic" by default so this will have no impact on existing usecases.

* Update toolchain to 2021r2 (#5828)
* Update C3 libs to support only ECO3 and newer

This adds a function to WiFiClientSecure to set the ALPN protocol.

This is required for an MQTT client to connect to AWS IoT when using an AWS Custom Authorizer, as described here.

Example code snippet:

...
WiFiClientSecure wiFiClient;

// ALPN protocol, needed with AWS custom authorizer
const char *aws_protos[] = {"mqtt", NULL};

void setup() {
  wiFiClient.setCACert(AWSCAPEM);
  wiFiClient.setAlpnProtocols(aws_protos);
}
...

Summary

Related to the issue #5773 and #2280.

_user_defined_size is removed from EEPROMClass because it is redundant in the current code
EEPROMClass::length() returns _size that is the true available size of EEPROM
Impact

_user_defined_size is removed from EEPROMClass
EEPROMClass::length() returns _size that is the true available size of EEPROM

The Deneyap Mini used a SerialMode custom menu item, which is not defined. The correct item, CDCOnBoot, has replaced it.

Function analogReadResolution set how many bits will analogRead return.

Find out that this functionality was added back 2017 by @me-no-dev in #161.

Related issues:
#5163

removes deprecated esp_eth_set_default_handlers()

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

* SPI.h add new call to return a SS pin number used.

As code example states, the SS pin needs to be explicitly set for output for SPI to work, but the pin number have to be coded in addition to the SPI logic in the library, which means this duplicates code. It is much better to just be able to get the pin number from library itself.

* Update SPI_Multiple_Buses.ino to use new pinSS method

Simplify the example case, to show usage of pinSS method. This also simplifies the example, removing duplicated code.

esp-dsp: master e05fc36
esp-face: master f108a83
esp-rainmaker: f1b82c7
esp32-camera: master 3022601
esp_littlefs: master 05d55ab

I2C Slave Implementation

esp-dsp: master e05fc36
esp-face: master f108a83
esp-rainmaker: f1b82c7
esp32-camera: master 3022601
esp_littlefs: master f6e7108

[Docs] Added Python is missing on the troubleshooting section