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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)
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‎examples/AsyncCaptivePortal/AsyncCaptivePortal.ino

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/****************************************************************************************************************************
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AsyncCaptivePortal.ino
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AsyncDNSServer_RP2040W is an Async DNS_Server library for the RP2040W with CYW43439 WiFi
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Based on and modified from ESPAsyncDNSServer Library (https://github.com/devyte/ESPAsyncDNSServer)
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Built by Khoi Hoang https://github.com/khoih-prog/AsyncDNSServer_RP2040W
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*****************************************************************************************************************************/
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#include "defines.h"
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#include <AsyncDNSServer_RP2040W.h>
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#include <AsyncWebServer_RP2040W.h>
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const byte DNS_PORT = 53;
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IPAddress apIP(192, 168, 100, 1);
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AsyncDNSServer dnsServer;
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AsyncWebServer server(80);
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int status = WL_IDLE_STATUS;
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String responseHTML = ""
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"<!DOCTYPE html><html lang='en'><head>"
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"<meta name='viewport' content='width=device-width'>"
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"<title>RP2040W-CaptivePortal</title></head><body>"
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"<h1>Hello World from RP2040W!</h1><p>This is a captive portal example."
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" All requests will be redirected here.</p></body></html>";
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void handleNotFound(AsyncWebServerRequest *request)
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{
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request->send(200, "text/html", responseHTML);
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}
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void printWifiStatus()
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{
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// print the SSID of the network you're attached to:
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Serial.print("SSID: ");
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Serial.println(WiFi.SSID());
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// print your board's IP address:
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IPAddress ip = WiFi.localIP();
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Serial.print("Local IP Address: ");
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Serial.println(ip);
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// print the received signal strength:
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long rssi = WiFi.RSSI();
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Serial.print("signal strength (RSSI):");
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Serial.print(rssi);
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Serial.println(" dBm");
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}
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void setup()
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{
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Serial.begin(115200);
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while (!Serial && millis() < 5000);
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Serial.print("\nStart AsyncCaptivePortal on "); Serial.println(BOARD_NAME);
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Serial.println(ASYNC_DNS_SERVER_RP2040W_VERSION);
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#if defined(ASYNC_DNS_SERVER_RP2040W_VERSION_MIN)
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if (ASYNC_DNS_SERVER_RP2040W_VERSION_INT < ASYNC_DNS_SERVER_RP2040W_VERSION_MIN)
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{
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Serial.print("Warning. Must use this example on Version equal or later than : ");
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Serial.println(ASYNC_DNS_SERVER_RP2040W_VERSION_MIN_TARGET);
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}
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#endif
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///////////////////////////////////
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// check for the WiFi module:
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if (WiFi.status() == WL_NO_MODULE)
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{
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Serial.println("Communication with WiFi module failed!");
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// don't continue
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while (true);
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}
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Serial.print(F("Connecting to SSID: "));
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Serial.println(ssid);
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status = WiFi.begin(ssid, pass);
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delay(1000);
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// attempt to connect to WiFi network
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while ( status != WL_CONNECTED)
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{
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delay(500);
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// Connect to WPA/WPA2 network
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status = WiFi.status();
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}
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printWifiStatus();
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///////////////////////////////////
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// modify TTL associated with the domain name (in seconds)
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// default is 60 seconds
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dnsServer.setTTL(300);
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// set which return code will be used for all other domains (e.g. sending
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// ServerFailure instead of NonExistentDomain will reduce number of queries
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// sent by clients)
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// default is AsyncDNSReplyCode::NonExistentDomain
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dnsServer.setErrorReplyCode(AsyncDNSReplyCode::ServerFailure);
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// if DNSServer is started with "*" for domain name, it will reply with
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// provided IP to all DNS request
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dnsServer.start(DNS_PORT, "*", apIP);
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server.onNotFound(handleNotFound);
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server.begin();
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Serial.print(F("HTTP DNSServer is @ IP : "));
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Serial.println(apIP);
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}
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void loop()
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{
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}

‎examples/AsyncCaptivePortal/defines.h

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/****************************************************************************************************************************
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defines.h
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AsyncDNSServer_RP2040W is an Async DNS_Server library for the RP2040W with CYW43439 WiFi
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Based on and modified from ESPAsyncDNSServer Library (https://github.com/devyte/ESPAsyncDNSServer)
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Built by Khoi Hoang https://github.com/khoih-prog/AsyncDNSServer_RP2040W
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*****************************************************************************************************************************/
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#ifndef defines_h
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#define defines_h
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#if !( defined(ARDUINO_RASPBERRY_PI_PICO_W) )
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#error For RASPBERRY_PI_PICO_W only
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#endif
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#define ASYNC_DNS_RP2040W_DEBUG_PORT Serial
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// Debug Level from 0 to 4
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#define _ASYNC_DNS_RP2040W_LOGLEVEL_ 4
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#if (_ASYNC_DNS_RP2040W_LOGLEVEL_ > 3)
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#warning Using RASPBERRY_PI_PICO_W with CYW43439 WiFi
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#endif
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char ssid[] = "your_ssid"; // your network SSID (name)
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char pass[] = "12345678"; // your network password (use for WPA, or use as key for WEP), length must be 8+
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#endif //defines_h

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