v1.0.0 for RP2040W with CYW43439 WiFi

### Initial Releases v1.0.0

1. Initial coding to support **RASPBERRY_PI_PICO_W with CYW43439 WiFi**, using [**arduino-pico core v2.4.0+**](https://github.com/earlephilhower/arduino-pico)

Author: khoih-prog

CONTRIBUTING.md

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+## Contributing to AsyncDNSServer_RP2040W
+
+### Reporting Bugs
+
+Please report bugs in [AsyncDNSServer_RP2040W Issues](https://github.com/khoih-prog/AsyncDNSServer_RP2040W/issues) if you find them.
+
+However, before reporting a bug please check through the following:
+
+* [Existing Open Issues](https://github.com/khoih-prog/AsyncDNSServer_RP2040W/issues) - someone might have already encountered this.
+
+If you don't find anything, please [open a new issue](https://github.com/khoih-prog/AsyncDNSServer_RP2040W/issues/new).
+
+### How to submit a bug report
+
+Please ensure to specify the following:
+
+* Arduino IDE version (e.g. 1.8.19) or Platform.io version
+* `RP2040` Core Version (e.g. RP2040 core v2.4.0)
+* `RP2040` Board type (e.g. RASPBERRY_PI_PICO_W)
+* Contextual information (e.g. what you were trying to achieve)
+* Simplest possible steps to reproduce
+* Anything that might be relevant in your opinion, such as:
+  * Operating system (Windows, Ubuntu, etc.) and the output of `uname -a`
+  * Network configuration
+
+
+### Example
+
+```
+Arduino IDE version: 1.8.19
+RP2040 core v2.4.0
+RASPBERRY_PI_PICO_W Module
+OS: Ubuntu 20.04 LTS
+Linux xy-Inspiron-3593 5.15.0-41-generic #44~20.04.1-Ubuntu SMP Fri Jun 24 13:27:29 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
+
+Context:
+I encountered a crash while using Ethernet Async_AdvancedWebServer.
+
+Steps to reproduce:
+1. ...
+2. ...
+3. ...
+4. ...
+```
+
+### Sending Feature Requests
+
+Feel free to post feature requests. It's helpful if you can explain exactly why the feature would be useful.
+
+There are usually some outstanding feature requests in the [existing issues list](https://github.com/khoih-prog/AsyncDNSServer_RP2040W/issues?q=is%3Aopen+is%3Aissue+label%3Aenhancement), feel free to add comments to them.
+
+### Sending Pull Requests
+
+Pull Requests with changes and fixes are also welcome!
+
+

LICENSE

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+# AsyncDNSServer_RP2040W
+
+
+[![arduino-library-badge](https://www.ardu-badge.com/badge/AsyncDNSServer_RP2040W.svg?)](https://www.ardu-badge.com/AsyncDNSServer_RP2040W)
+[![GitHub release](https://img.shields.io/github/release/khoih-prog/AsyncDNSServer_RP2040W.svg)](https://github.com/khoih-prog/AsyncDNSServer_RP2040W/releases)
+[![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)](#Contributing)
+[![GitHub issues](https://img.shields.io/github/issues/khoih-prog/AsyncDNSServer_RP2040W.svg)](http://github.com/khoih-prog/AsyncDNSServer_RP2040W/issues)
+
+<a href="https://www.buymeacoffee.com/khoihprog6" title="Donate to my libraries using BuyMeACoffee"><img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" alt="Donate to my libraries using BuyMeACoffee" style="height: 50px !important;width: 181px !important;" ></a>
+<a href="https://www.buymeacoffee.com/khoihprog6" title="Donate to my libraries using BuyMeACoffee"><img src="https://img.shields.io/badge/buy%20me%20a%20coffee-donate-orange.svg?logo=buy-me-a-coffee&logoColor=FFDD00" style="height: 20px !important;width: 200px !important;" ></a>
+
+---
+---
+
+## Table of Contents
+
+
+* [Why do we need this AsyncDNSServer_RP2040W library](#why-do-we-need-this-AsyncDNSServer_RP2040W-library)
+  * [Features](#features)
+  * [Why Async is better](#why-async-is-better)
+  * [Currently Supported Boards](#currently-supported-boards)
+* [Changelog](changelog.md)
+* [Prerequisites](#prerequisites)
+* [Installation](#installation)
+  * [Use Arduino Library Manager](#use-arduino-library-manager)
+  * [Manual Install](#manual-install)
+  * [VS Code & PlatformIO](#vs-code--platformio)
+* [HOWTO Fix `Multiple Definitions` Linker Error](#howto-fix-multiple-definitions-linker-error)
+* [HOWTO Setting up the Async DNS Server](#howto-setting-up-the-async-dns-server)
+* [Examples](#examples)
+	* [ 1. AsyncCaptivePortal](examples/AsyncCaptivePortal)
+  * [ 2. AsyncCaptivePortalAdvanced](examples/AsyncCaptivePortalAdvanced) 
+  * [ 3. AsyncDNServerFull](examples/AsyncDNServerFull)
+  * [ 4. AsyncDNSServer](examples/AsyncDNSServer)
+  * [ 5. multiFileProject](examples/multiFileProject)
+* [Example AsyncDNSServer](#example-AsyncDNSServer)
+  * [1. File AsyncDNSServer.ino](#1-file-AsyncDNSServerino)
+  * [2. File defines.h](#2-file-definesh) 
+* [Debug](#debug)
+* [Troubleshooting](#troubleshooting)
+* [Issues](#issues)
+* [TO DO](#to-do)
+* [DONE](#done)
+* [Contributions and Thanks](#contributions-and-thanks)
+* [Contributing](#contributing)
+* [License](#license)
+* [Copyright](#copyright)
+
+---
+---
+
+### Why do we need this [AsyncDNSServer_RP2040W library](https://github.com/khoih-prog/AsyncDNSServer_RP2040W)
+
+#### Features
+
+This [AsyncDNSServer_RP2040W library](https://github.com/khoih-prog/AsyncDNSServer_RP2040W) is a fully asynchronous DNSServer library, designed for a trouble-free, multi-connection network environment, for **RASPBERRY_PI_PICO_W using CYW43439 WiFi**.
+
+This library is based on, modified from:
+
+1. [Develo's ESPAsyncDNSServer](https://github.com/devyte/ESPAsyncDNSServer)
+2. [AsyncDNSServer_STM32](https://github.com/khoih-prog/AsyncDNSServer_STM32)
+
+to apply the better and faster **asynchronous** feature into **RASPBERRY_PI_PICO_W using CYW43439 WiFi**.
+
+
+#### Why Async is better
+
+- Using asynchronous network means that you can handle **more than one connection at the same time**
+- You are called once the packet is ready
+- After a DNS Client connected to this Async DNS server, you are **immediately ready** to handle other connections while the Server is taking care of receiving and responding to the UDP packets in the background.
+- You are not required to check in a tight loop() the arrival of the DNS requesting packets to process them.
+- **Speed is OMG**
+
+---
+
+### Currently Supported Boards
+
+1. **RASPBERRY_PI_PICO_W with CYW43439 WiFi** using [**arduino-pico core v2.4.0+**](https://github.com/earlephilhower/arduino-pico)
+
+<p align="center">
+    <img src="https://github.com/khoih-prog/AsyncDNSServer_RP2040W/blob/main/pics/RP2040W-pinout.svg">
+</p>
+
+
+---
+---
+
+## Prerequisites
+
+ 1. [`Arduino IDE 1.8.19+` for Arduino](https://github.com/arduino/Arduino). [![GitHub release](https://img.shields.io/github/release/arduino/Arduino.svg)](https://github.com/arduino/Arduino/releases/latest)
+ 2. [`Earle Philhower's arduino-pico core v2.4.0+`](https://github.com/earlephilhower/arduino-pico) for **RASPBERRY_PI_PICO_W with CYW43439 WiFi**, etc. [![GitHub release](https://img.shields.io/github/release/earlephilhower/arduino-pico.svg)](https://github.com/earlephilhower/arduino-pico/releases/latest)
+ 3. [`AsyncUDP_RP2040W library v1.0.0+`](https://github.com/khoih-prog/AsyncUDP_RP2040W) for RASPBERRY_PI_PICO_W with CYW43439 WiFi. To install. check [![arduino-library-badge](https://www.ardu-badge.com/badge/AsyncUDP_RP2040W.svg?)](https://www.ardu-badge.com/AsyncUDP_RP2040W)
+ 
+---
+
+### Installation
+
+The suggested way to install is to:
+
+#### Use Arduino Library Manager
+
+The best way is to use `Arduino Library Manager`. Search for `AsyncDNSServer_RP2040W`, then select / install the latest version. You can also use this link [![arduino-library-badge](https://www.ardu-badge.com/badge/AsyncDNSServer_RP2040W.svg?)](https://www.ardu-badge.com/AsyncDNSServer_RP2040W) for more detailed instructions.
+
+### Manual Install
+
+1. Navigate to [AsyncDNSServer_RP2040W](https://github.com/khoih-prog/AsyncDNSServer_RP2040W) page.
+2. Download the latest release `AsyncDNSServer_RP2040W-main.zip`.
+3. Extract the zip file to `AsyncDNSServer_RP2040W-main` directory 
+4. Copy the whole `AsyncDNSServer_RP2040W-main` folder to Arduino libraries' directory such as `~/Arduino/libraries/`.
+
+### VS Code & PlatformIO:
+
+1. Install [VS Code](https://code.visualstudio.com/)
+2. Install [PlatformIO](https://platformio.org/platformio-ide)
+3. Install [**AsyncDNSServer_RP2040W** library](https://registry.platformio.org/libraries/khoih-prog/AsyncDNSServer_RP2040W) by using [Library Manager](https://registry.platformio.org/libraries/khoih-prog/AsyncDNSServer_RP2040W/installation). Search for AsyncDNSServer_RP2040W in [Platform.io Author's Libraries](https://platformio.org/lib/search?query=author:%22Khoi%20Hoang%22)
+4. Use included [platformio.ini](platformio/platformio.ini) file from examples to ensure that all dependent libraries will installed automatically. Please visit documentation for the other options and examples at [Project Configuration File](https://docs.platformio.org/page/projectconf.html)
+
+
+---
+---
+
+### HOWTO Fix `Multiple Definitions` Linker Error
+
+The current library implementation, using `xyz-Impl.h` instead of standard `xyz.cpp`, possibly creates certain `Multiple Definitions` Linker error in certain use cases.
+
+You can include this `.hpp` file
+
+```
+// Can be included as many times as necessary, without `Multiple Definitions` Linker Error
+#include "AsyncDNSServer_RP2040W.hpp"         //https://github.com/khoih-prog/AsyncDNSServer_RP2040W
+```
+
+in many files. But be sure to use the following `.h` file **in just 1 `.h`, `.cpp` or `.ino` file**, which must **not be included in any other file**, to avoid `Multiple Definitions` Linker Error
+
+```
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include "AsyncDNSServer_RP2040W.h"           //https://github.com/khoih-prog/AsyncDNSServer_RP2040W
+```
+
+Check the new [**multiFileProject** example](examples/multiFileProject) for a `HOWTO` demo.
+
+Have a look at the discussion in [Different behaviour using the src_cpp or src_h lib #80](https://github.com/khoih-prog/ESPAsync_WiFiManager/discussions/80)
+
+
+---
+---
+
+## HOWTO Setting up the Async DNS Server
+
+
+```cpp
+
+#include <AsyncDNSServer_RP2040W.h>
+
+const byte DNS_PORT = 53;
+
+IPAddress apIP;
+
+AsyncDNSServer dnsServer;
+
+
+void setup()
+{
+  ...
+  
+  // modify TTL associated  with the domain name (in seconds)
+  // default is 60 seconds
+  dnsServer.setTTL(300);
+  // set which return code will be used for all other domains 
+  // (e.g. sending ServerFailure instead of NonExistentDomain will reduce number of queries
+  // sent by clients). Default is AsyncDNSReplyCode::NonExistentDomain
+  dnsServer.setErrorReplyCode(AsyncDNSReplyCode::ServerFailure);
+
+  // start DNS server for a specific domain name
+  dnsServer.start(DNS_PORT, "*", Ethernet.localIP());
+
+  ...
+}
+
+void loop() 
+{
+}
+
+```
+
+---
+---
+
+
+### Examples
+
+
+ 1. [AsyncCaptivePortal](examples/AsyncCaptivePortal)
+ 2. [AsyncCaptivePortalAdvanced](examples/AsyncCaptivePortalAdvanced)
+ 3. [AsyncDNServerFull](examples/AsyncDNServerFull) 
+ 4. [AsyncDNSServer](examples/AsyncDNSServer)
+ 5. [multiFileProject](examples/multiFileProject)
+
+---
+
+### Example [AsyncDNSServer](examples/AsyncDNSServer)
+
+#### 1. File [AsyncDNSServer.ino](examples/AsyncDNSServer/AsyncDNSServer.ino)
+
+
+https://github.com/khoih-prog/AsyncDNSServer_RP2040W/blob/c9325a8c6accb27c5df1c7d29a209d2d064cda10/examples/AsyncDNSServer/AsyncDNSServer.ino#L10-L119
+
+
+#### 2. File [defines.h](examples/AsyncDNSServer/defines.h)
+
+https://github.com/khoih-prog/AsyncDNSServer_RP2040W/blob/c9325a8c6accb27c5df1c7d29a209d2d064cda10/examples/AsyncDNSServer/defines.h#L1-L29
+
+
+---
+---
+
+### Debug
+
+Debug is enabled by default on Serial. To disable, use level 0
+
+```cpp
+#define ASYNC_DNS_RP2040W_DEBUG_PORT      Serial
+
+// Use from 0 to 4. Higher number, more debugging messages and memory usage.
+#define _ASYNC_DNS_RP2040W_LOGLEVEL_      0
+```
+
+You can also change the debugging level from 0 to 4
+
+```cpp
+#define ASYNC_DNS_RP2040W_DEBUG_PORT      Serial
+
+
+// Use from 0 to 4. Higher number, more debugging messages and memory usage.
+#define _ASYNC_DNS_RP2040W_LOGLEVEL_    	4
+```
+
+---
+
+### Troubleshooting
+
+If you get compilation errors, more often than not, you may need to install a newer version of the [**arduino-pico core**](https://github.com/earlephilhower/arduino-pico)
+
+Sometimes, the library will only work if you update the [**arduino-pico core**](https://github.com/earlephilhower/arduino-pico) core to the latest version because I am using newly added functions.
+
+
+---
+---
+
+
+### Issues
+
+Submit issues to: [AsyncDNSServer_RP2040W issues](https://github.com/khoih-prog/AsyncDNSServer_RP2040W/issues)
+
+---
+
+## TO DO
+
+ 1. Fix bug. Add enhancement
+
+
+## DONE
+
+ 1. Add support to RASPBERRY_PI_PICO_W using CYW43439 WiFi
+ 2. Add more examples.
+ 3. Add debugging features.
+ 
+---
+---
+
+### Contributions and Thanks
+
+1. Based on and modified from [Develo's ESPAsyncDNSServer Library](https://github.com/devyte/ESPAsyncDNSServer).
+
+
+<table>
+  <tr>
+    <td align="center"><a href="https://github.com/devyte"><img src="https://github.com/devyte.png" width="100px;" alt="devyte"/><br/><sub><b>⭐️ Develo</b></sub></a><br/></td>
+  </tr> 
+</table>
+
+---
+
+### Contributing
+
+If you want to contribute to this project:
+- Report bugs and errors
+- Ask for enhancements
+- Create issues and pull requests
+- Tell other people about this library
+
+---
+
+### License
+
+- The library is licensed under [GPLv3](https://github.com/khoih-prog/AsyncDNSServer_RP2040W/blob/main/LICENSE)
+
+---
+
+## Copyright
+
+- Copyright 2016- Develo
+- Copyright 2022- Khoi Hoang
+

README.md

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+# AsyncDNSServer_RP2040W
+
+[![arduino-library-badge](https://www.ardu-badge.com/badge/AsyncDNSServer_RP2040W.svg?)](https://www.ardu-badge.com/AsyncDNSServer_RP2040W)
+[![GitHub release](https://img.shields.io/github/release/khoih-prog/AsyncDNSServer_RP2040W.svg)](https://github.com/khoih-prog/AsyncDNSServer_RP2040W/releases)
+[![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)](#Contributing)
+[![GitHub issues](https://img.shields.io/github/issues/khoih-prog/AsyncDNSServer_RP2040W.svg)](http://github.com/khoih-prog/AsyncDNSServer_RP2040W/issues)
+
+---
+---
+
+## Table of Contents
+
+* [Changelog](#changelog)
+  * [Initial Releases v1.0.0](#Initial-Releases-v100)
+
+---
+---
+
+## Changelog
+
+
+### Initial Releases v1.0.0
+
+1. Initial coding to support **RASPBERRY_PI_PICO_W with CYW43439 WiFi**, using [**arduino-pico core v2.4.0+**](https://github.com/earlephilhower/arduino-pico)