v1.6.0 to save heap when sending large data

### Releases v1.6.0

1. Support using `CString` to save heap to send `very large data`. Check [request->send(200, textPlainStr, jsonChartDataCharStr); - Without using String Class - to save heap #8](khoih-prog/Portenta_H7_AsyncWebServer#8) and [All memmove() removed - string no longer destroyed #11](khoih-prog/Portenta_H7_AsyncWebServer#11)
2. Add multiple examples to demo the new feature

Author: khoih-prog

CONTRIBUTING.md

@@ -1,23 +1,21 @@
-## Contributing to AsyncWebServer_Teensy41
+## Contributing to AsyncWebServer_Ethernet
 
 ### Reporting Bugs
 
-Please report bugs in AsyncWebServer_Teensy41 if you find them.
+Please report bugs in AsyncWebServer_Ethernet if you find them.
 
 However, before reporting a bug please check through the following:
 
-* [Existing Open Issues](https://github.com/khoih-prog/AsyncWebServer_Teensy41/issues) - someone might have already encountered this.
+* [Existing Open Issues](https://github.com/khoih-prog/AsyncWebServer_Ethernet/issues) - someone might have already encountered this.
 
-If you don't find anything, please [open a new issue](https://github.com/khoih-prog/AsyncWebServer_Teensy41/issues/new).
+If you don't find anything, please [open a new issue](https://github.com/khoih-prog/AsyncWebServer_Ethernet/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
-* `Teensyduino` Core Version (e.g. `Teensyduino core v1.57`)
-* `QNEthernet` library version (e.g. `QNEthernet v0.15.0`)
-* Board type and relevant info
+* Board Core Version (e.g. ESP8266 core v3.0.2)
 * 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:
@@ -29,25 +27,26 @@ Please ensure to specify the following:
 
 ```
 Arduino IDE version: 1.8.19
-Teensyduino core v1.57
-Teensy 4.1 using QNEthernet v0.15.0
+ESP8266_NODEMCU_ESP12E using ESP8266_W5500 Ethernet
+ESP8266 core v3.0.2
 OS: Ubuntu 20.04 LTS
 Linux xy-Inspiron-3593 5.15.0-48-generic #54~20.04.1-Ubuntu SMP Thu Sep 1 16:17:26 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
 
 Context:
-I encountered an endless loop while using this library
+I encountered a crash while using this library
 
 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/AsyncWebServer_Teensy41/issues?q=is%3Aopen+is%3Aissue+label%3Aenhancement), feel free to add comments to them.
+There are usually some outstanding feature requests in the [existing issues list](https://github.com/khoih-prog/AsyncWebServer_Ethernet/issues?q=is%3Aopen+is%3Aissue+label%3Aenhancement), feel free to add comments to them.
 
 ### Sending Pull Requests
 

changelog.md

@@ -1,17 +1,15 @@
-# AsyncWebServer_Teensy41
+# AsyncWebServer_Ethernet
 
-[![arduino-library-badge](https://www.ardu-badge.com/badge/AsyncWebServer_Teensy41.svg?)](https://www.ardu-badge.com/AsyncWebServer_Teensy41)
-[![GitHub release](https://img.shields.io/github/release/khoih-prog/AsyncWebServer_Teensy41.svg)](https://github.com/khoih-prog/AsyncWebServer_Teensy41/releases)
-[![GitHub](https://img.shields.io/github/license/mashape/apistatus.svg)](https://github.com/khoih-prog/AsyncWebServer_Teensy41/blob/master/LICENSE)
+[![arduino-library-badge](https://www.ardu-badge.com/badge/AsyncWebServer_Ethernet.svg?)](https://www.ardu-badge.com/AsyncWebServer_Ethernet)
+[![GitHub release](https://img.shields.io/github/release/khoih-prog/AsyncWebServer_Ethernet.svg)](https://github.com/khoih-prog/AsyncWebServer_Ethernet/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/AsyncWebServer_Teensy41.svg)](http://github.com/khoih-prog/AsyncWebServer_Teensy41/issues)
+[![GitHub issues](https://img.shields.io/github/issues/khoih-prog/AsyncWebServer_Ethernet.svg)](http://github.com/khoih-prog/AsyncWebServer_Ethernet/issues)
 
 ---
 ---
 
 ## Table of contents
 
-* [Table of contents](#table-of-contents)
 * [Changelog](#changelog)
   * [Releases v1.5.0](#releases-v150)
   * [Releases v1.4.1](#releases-v141)
@@ -21,15 +19,16 @@
 
 ## Changelog
 
-### Releases v1.5.0
+#### Releases v1.5.0
 
-1. Fix issue with slow browsers or network. Check [Target stops responding after variable time when using Firefox on Windows 10 #3](https://github.com/khoih-prog/AsyncWebServer_RP2040W/issues/3)
-2. Add functions and example `Async_AdvancedWebServer_favicon` to support `favicon.ico`
+1. Support using `CString` to save heap to send `very large data`. Check [request->send(200, textPlainStr, jsonChartDataCharStr); - Without using String Class - to save heap #8](https://github.com/khoih-prog/Portenta_H7_AsyncWebServer/pull/8) and [All memmove() removed - string no longer destroyed #11](https://github.com/khoih-prog/Portenta_H7_AsyncWebServer/pull/11)
+2. Add multiple examples to demo the new feature
 
-### Releases v1.4.1
-
-1. Initial porting and coding for **Teensy 4.1 using built-in QNEthernet**
-2. Bump up version to v1.4.1 to sync with [AsyncWebServer_STM32](https://github.com/khoih-prog/AsyncWebServer_STM32) v1.4.1
+#### Releases v1.4.1
 
+1. Initial coding to port [ESPAsyncWebServer](https://github.com/me-no-dev/ESPAsyncWebServer) to ESP8266 boards using W5x00 / ENC28J60 Ethernet.
+2. Add more examples.
+3. Add debugging features.
+4. Bump up to v1.4.1 to sync with [AsyncWebServer_WT32_ETH01 v1.4.1](https://github.com/khoih-prog/AsyncWebServer_WT32_ETH01).
 
 

examples/AsyncMultiWebServer/AsyncMultiWebServer.ino

@@ -1,49 +1,22 @@
 /****************************************************************************************************************************
-  AsyncMultiWebServer.h - Dead simple AsyncWebServer for Teensy41 QNEthernet
+  AsyncMultiWebServer.h
   
-  For Teensy41 with QNEthernet
-  
-  AsyncWebServer_Teensy41 is a library for the Teensy41 with QNEthernet
+  For ESP8266 using W5x00/ENC8266 Ethernet
+   
+  AsyncWebServer_Ethernet is a library for the Ethernet with lwIP_5100, lwIP_5500 or lwIP_enc28j60 library
   
   Based on and modified from ESPAsyncWebServer (https://github.com/me-no-dev/ESPAsyncWebServer)
-  Built by Khoi Hoang https://github.com/khoih-prog/AsyncWebServer_Teensy41
+  Built by Khoi Hoang https://github.com/khoih-prog/AsyncWebServer_Ethernet
   Licensed under GPLv3 license
  *****************************************************************************************************************************/
 
-#if !( defined(CORE_TEENSY) && defined(__IMXRT1062__) && defined(ARDUINO_TEENSY41) )
-  #error Only Teensy 4.1 supported
-#endif
-
-// Debug Level from 0 to 4
-#define _TEENSY41_ASYNC_TCP_LOGLEVEL_       1
-#define _AWS_TEENSY41_LOGLEVEL_             1
-
-#define SHIELD_TYPE     "Teensy4.1 QNEthernet"
-
-#if (_AWS_TEENSY41_LOGLEVEL_ > 3)
-  #warning Using QNEthernet lib for Teensy 4.1. Must also use Teensy Packages Patch or error
-#endif
-
-#define USING_DHCP            true
-//#define USING_DHCP            false
-
-#if !USING_DHCP
-  // Set the static IP address to use if the DHCP fails to assign
-  IPAddress myIP(192, 168, 2, 222);
-  IPAddress myNetmask(255, 255, 255, 0);
-  IPAddress myGW(192, 168, 2, 1);
-  //IPAddress mydnsServer(192, 168, 2, 1);
-  IPAddress mydnsServer(8, 8, 8, 8);
-#endif
-
-#include "QNEthernet.h"       // https://github.com/ssilverman/QNEthernet
-using namespace qindesign::network;
+#include "defines.h"
 
-#include <AsyncWebServer_Teensy41.h>
+#include <AsyncWebServer_Ethernet.h>
 
 unsigned int    analogReadPin []  = { 12, 13, 14 };
 
-#define BUFFER_SIZE       500
+#define BUFFER_SIZE       512
 
 #define HTTP_PORT1        8080
 #define HTTP_PORT2        8081
@@ -82,7 +55,7 @@ body { background-color: #cccccc; font-family: Arial, Helvetica, Sans-Serif; Col
 </head>\
 <body>\
 <h1>Hello from %s</h1>\
-<h2>running AsyncWebServer_Teensy41</h2>\
+<h2>running AsyncWebServer_Ethernet</h2>\
 <h3>on %s</h3>\
 <h3>Uptime: %d d %02d:%02d:%02d</h3>\
 </body>\
@@ -128,56 +101,63 @@ void handleNotFound(AsyncWebServerRequest * request)
   request->send(404, F("text/plain"), message);
 }
 
-void setup()
+void initEthernet()
 {
-  Serial.begin(115200);
-  while (!Serial && millis() < 5000);
+  SPI.begin();
+  SPI.setClockDivider(SPI_CLOCK_DIV4);
+  SPI.setBitOrder(MSBFIRST);
+  SPI.setDataMode(SPI_MODE0);
 
-  delay(200);
-
-  Serial.print("\nStart AsyncMultiWebServer on "); Serial.print(BOARD_NAME);
-  Serial.print(" with "); Serial.println(SHIELD_TYPE);
-  Serial.println(ASYNC_WEBSERVER_TEENSY41_VERSION);
-
-  delay(500);
-
-#if USING_DHCP
-  // Start the Ethernet connection, using DHCP
-  Serial.print("Initialize Ethernet using DHCP => ");
-  Ethernet.begin();
-#else
-  // Start the Ethernet connection, using static IP
-  Serial.print("Initialize Ethernet using static IP => ");
-  Ethernet.begin(myIP, myNetmask, myGW);
-  Ethernet.setDNSServerIP(mydnsServer);
+#if !USING_DHCP
+  eth.config(localIP, gateway, netMask, gateway);
 #endif
-
-  if (!Ethernet.waitForLocalIP(5000))
+  
+  eth.setDefault();
+  
+  if (!eth.begin()) 
   {
-    Serial.println(F("Failed to configure Ethernet"));
-
-    if (!Ethernet.linkStatus())
+    Serial.println("No Ethernet hardware ... Stop here");
+    
+    while (true) 
     {
-      Serial.println(F("Ethernet cable is not connected."));
+      delay(1000);
     }
-
-    // Stay here forever
-    while (true)
+  } 
+  else 
+  {
+    Serial.print("Connecting to network : ");
+    
+    while (!eth.connected()) 
     {
-      delay(1);
+      Serial.print(".");
+      delay(1000);
     }
   }
-  else
-  {
-    Serial.print(F("Connected! IP address:")); Serial.println(Ethernet.localIP());
-  }
+ 
+  Serial.println();
 
-#if USING_DHCP
-  delay(1000);
-#else  
-  delay(2000);
+#if USING_DHCP  
+  Serial.print("Ethernet DHCP IP address: ");
+#else
+  Serial.print("Ethernet Static IP address: ");
 #endif
+  
+  Serial.println(eth.localIP());
+}
 
+void setup()
+{
+  Serial.begin(115200);
+  while (!Serial && millis() < 5000);
+
+  delay(200);
+
+  Serial.print("\nStart AsyncMultiWebServer on "); Serial.print(BOARD_NAME);
+  Serial.print(" with "); Serial.println(SHIELD_TYPE);
+  Serial.println(ASYNC_WEBSERVER_ETHERNET_VERSION);
+
+  initEthernet();
+  
   for (serverIndex = 0; serverIndex < NUM_SERVERS; serverIndex++)
   {
     multiServer[serverIndex] = new AsyncWebServer(http_port[serverIndex]);  

examples/AsyncMultiWebServer/defines.h

@@ -0,0 +1,73 @@
+/****************************************************************************************************************************
+  defines.h
+  
+  For ESP8266 using W5x00/ENC8266 Ethernet
+   
+  AsyncWebServer_Ethernet is a library for the Ethernet with lwIP_5100, lwIP_5500 or lwIP_enc28j60 library
+  
+  Based on and modified from ESPAsyncWebServer (https://github.com/me-no-dev/ESPAsyncWebServer)
+  Built by Khoi Hoang https://github.com/khoih-prog/AsyncWebServer_Ethernet
+  Licensed under GPLv3 license
+ ***************************************************************************************************************************************/
+
+#ifndef defines_h
+#define defines_h
+
+#if defined(ESP8266)
+  #define LED_ON      LOW
+  #define LED_OFF     HIGH
+#else
+  #error Only ESP8266
+#endif  
+
+#define _AWS_ETHERNET_LOGLEVEL_               1
+
+//////////////////////////////////////////////////////////
+
+#define USING_W5500         true
+#define USING_W5100         false
+#define USING_ENC28J60      false
+
+#include <SPI.h>
+
+#define CSPIN       16      // 5
+
+#if USING_W5500
+  #include "W5500lwIP.h"
+  #define SHIELD_TYPE       "ESP8266_W5500 Ethernet"
+  
+  Wiznet5500lwIP eth(CSPIN); 
+   
+#elif USING_W5100
+  #include <W5100lwIP.h>
+  #define SHIELD_TYPE       "ESP8266_W5100 Ethernet"
+  
+  Wiznet5100lwIP eth(CSPIN);
+
+#elif USING_ENC28J60
+  #include <ENC28J60lwIP.h>
+  #define SHIELD_TYPE       "ESP8266_ENC28J60 Ethernet"
+  
+  ENC28J60lwIP eth(CSPIN);
+#else
+  // default if none selected
+  #include "W5500lwIP.h"
+
+  Wiznet5500lwIP eth(CSPIN);
+#endif
+
+#include <WiFiClient.h> // WiFiClient (-> TCPClient)
+
+using TCPClient = WiFiClient;
+
+//////////////////////////////////////////////////////////
+
+#define USING_DHCP        true
+
+#if !USING_DHCP
+  IPAddress localIP(192, 168, 2, 222);
+  IPAddress gateway(192, 168, 2, 1);
+  IPAddress netMask(255, 255, 255, 0);
+#endif
+
+#endif    //defines_h