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This is simple yet complete WebServer library for AVR, Teensy, SAM DUE, SAMD21/SAMD51, nRF52, STM32, etc. boards running Ethernet shields. The functions are similar and compatible to ESP8266/ESP32 WebServer libraries to make life much easier to port sketches from ESP8266/ESP32.

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MIT license
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EthernetWebServer

arduino-library-badge GitHub release GitHub contributions welcome GitHub issues

Why do we need this EthernetWebServer library

This EthernetWebServer library is a simple yet complete WebServer library for AVR, Teensy, SAM DUE, Arduino SAMD21, Adafruit SAMD21/SAMD51, Adafruit nRF52, ESP32/ESP8266, STM32, etc. boards using Ethernet shields. The functions are similar and compatible to those of ESP32 WebServer and ESP8266WebServer libraries to make life much easier to port sketches from ESP8266/ESP32.

Supporting Boards

This EthernetWebServer library currently supports these following boards:

  1. nRF52 boards, such as AdaFruit Feather nRF52832, nRF52840 Express, BlueFruit Sense, Itsy-Bitsy nRF52840 Express, Metro nRF52840 Express, NINA_B302_ublox, NINA_B112_ublox, etc.
  2. SAM DUE
  3. SAMD21
  • Arduino SAMD21: ZERO, MKRs, NANO_33_IOT, etc.
  • Adafruit SAMD21 (M0): ItsyBitsy M0, Feather M0, Feather M0 Express, Metro M0 Express, Circuit Playground Express, Trinket M0, PIRkey, Hallowing M0, Crickit M0, etc.
  • Seeeduino: LoRaWAN, Zero, Femto M0, XIAO M0, Wio GPS Board, etc.
  1. SAMD51
  • Adafruit SAMD51 (M4): Metro M4, Grand Central M4, ItsyBitsy M4, Feather M4 Express, Trellis M4, Metro M4 AirLift Lite, MONSTER M4SK Express, Hallowing M4, etc.
  • Seeeduino: Wio Terminal, Grove UI Wireless
  1. Teensy (4.1, 4.0, 3.6, 3.5, 3,2, 3.1, 3.0, LC)
  2. AVR Mega1280, 2560, ADK.
  3. ESP32
  4. ESP8266

Supporting Ethernet shields/modules:

  1. W5x00 using Ethernet, EthernetLarge, Ethernet2 or Ethernet3 library
  2. ENC28J60 using EthernetENC or UIPEthernet library

The library provides these features:

  1. TCP Server and Client
  2. UDP Server and Client
  3. HTTP Server and Client
  4. HTTP GET and POST requests, provides argument parsing, handles one client at a time.

Library is based on and modified from:

  1. Ivan Grokhotkov's ESP8266WebServer
  2. Ivan Grokhotkov's ESP32 WebServer

The EthernetWebServer class, found in EthernetWebServer.h header, is a simple WebServer class, knowing how to handle HTTP requests such as GET and POST and can only support one simultaneous client.

Release v1.0.13

  1. Add support to PROGMEM-related commands, such as sendContent_P() and send_P()
  2. Update Platform.ini to support PlatformIO 5.x owner-based dependency declaration.
  3. Clean up code.
  4. Update examples.

New in v1.0.12

  1. Add support to new EthernetENC library for ENC28J60.
  2. Add debug feature. Clean up code.

New in v1.0.11

  1. Add support to Seeeduino SAMD21/SAMD51 boards (LoRaWAN, Zero, Femto M0, XIAO M0, Wio GPS Board, etc.)
  2. Add and restructure examples.

New in v1.0.10

  1. Fix bug not closing client and releasing socket.
  2. Merge new features from latest ESP8266WebServer
  3. Add and enhance examples.

New in v1.0.9

  1. Add EthernetWrapper.h for easier W5x00 support as well as more Ethernet libs in the future.
  2. Add default SS/CS pin for ESP8266 and ESP32
  3. Increase default clock speed for W5x00 in Ethernet, and EthernetLarge libraries to 25MHz from 14MHz. Tested OK on W5100 as well as W5500.

New in v1.0.8

  1. Fix W5x00 support for ESP8266 and many more boards.

New in v1.0.7

  1. Add ENC28J60 support to ESP32 and ESP8266 boards.

New in v1.0.6

  1. Add W5x00 nsupport to ESP32 and ESP8266 boards.

New in v1.0.5

  1. Add support to nRF52 boards, such as AdaFruit Feather nRF52832, nRF52840 Express, BlueFruit Sense, Itsy-Bitsy nRF52840 Express, Metro nRF52840 Express, NINA_B302_ublox, etc.
  2. Support any future custom Ethernet library that meets the no-compiling-error requirements. Currently Ethernet, EthernetLarge, Ethernet2 and Ethernet3 libraries are supported. Ethernet_Shield_W5200, EtherCard, EtherSia libraries are not supported now.

New in v1.0.4

  1. Add support to SAM51 (Itsy-Bitsy M4, Metro M4, Grand Central M4, Feather M4 Express, etc.).

From v1.0.3+, the library supports more Arduino boards ( SAM DUE, SAMD21: ZERO, MKR, NANO_33_IOT, M0, M0 Pro, AdaFruit CIRCUITPLAYGROUND_EXPRESS, etc.)

From v1.0.2+, the library supports many more Arduino boards (Atmel AVR-s, Atmel SAM3X8E ARM Cortex-M3, STM32F series, ESP8266, Intel ARC32(Genuino101), Nordic nRF51(RFduino), Teensy boards, Realtek Ameba(RTL8195A,RTL8710)) using Wiznet W5x00 or ENC28J60 Ethernet shields by using UIPEthernet library besides standard Ethernet library.

Prerequisite

  1. Arduino IDE 1.8.13+ for Arduino
  2. Arduino AVR core 1.8.3+ for Arduino AVR boards. Use Arduino Board Manager to install.
  3. Teensy core v1.53+ for Teensy (4.1, 4.0, 3.6, 3.5, 3,2, 3.1, 3.0) boards.
  4. Arduino SAM DUE core v1.6.12+ for SAM DUE ARM Cortex-M3 boards.
  5. Arduino SAMD core 1.8.9+ for SAMD ARM Cortex-M0+ boards (Nano 33 IoT, etc.).
  6. Adafruit SAMD core 1.6.4+ for SAMD ARM Cortex-M0+ and M4 boards (Itsy-Bitsy M4, etc.)
  7. Seeeduino SAMD core 1.8.1+ for SAMD21/SAMD51 boards (XIAO M0, Wio Terminal, etc.)
  8. Adafruit nRF52 v0.21.0+ for nRF52 boards such as AdaFruit Feather nRF52840 Express, NINA_B302_ublox, NINA_B112_ublox, etc.
  9. ESP32 core 1.0.4+ for ESP32 boards
  10. ESP8266 core 2.7.4+ for ESP8266 boards. To use ESP8266 core 2.7.1+ for LittleFS.
  11. Functional-VLPP library v1.0.1+ to use server's lambda function. To install. check arduino-library-badge
  12. Depending on which Ethernet card you're using:

Installation

Use Arduino Library Manager

The best and easiest way is to use Arduino Library Manager. Search for EthernetWebServer, then select / install the latest version. You can also use this link arduino-library-badge for more detailed instructions.

Manual Install

  1. Navigate to EthernetWebServer page.
  2. Download the latest release EthernetWebServer-master.zip.
  3. Extract the zip file to EthernetWebServer-master directory
  4. Copy the whole EthernetWebServer-master folder to Arduino libraries' directory such as ~/Arduino/libraries/.

VS Code & PlatformIO:

  1. Install VS Code
  2. Install PlatformIO
  3. Install EthernetWebServer library by using Library Manager. Search for EthernetWebServer in Platform.io Author's Libraries
  4. Use included 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

Packages' Patches

  1. To be able to compile, run and automatically detect and display BOARD_NAME on nRF52840/nRF52832 boards, you have to copy the whole nRF52 0.21.0 directory into Adafruit nRF52 directory (~/.arduino15/packages/adafruit/hardware/nrf52/0.21.0).

Supposing the Adafruit nRF52 version is 0.21.0. These files must be copied into the directory:

  • ~/.arduino15/packages/adafruit/hardware/nrf52/0.21.0/platform.txt
  • ~/.arduino15/packages/adafruit/hardware/nrf52/0.21.0/boards.txt
  • ~/.arduino15/packages/adafruit/hardware/nrf52/0.21.0/variants/NINA_B302_ublox/variant.h
  • ~/.arduino15/packages/adafruit/hardware/nrf52/0.21.0/variants/NINA_B302_ublox/variant.cpp
  • ~/.arduino15/packages/adafruit/hardware/nrf52/0.21.0/variants/NINA_B112_ublox/variant.h
  • ~/.arduino15/packages/adafruit/hardware/nrf52/0.21.0/variants/NINA_B112_ublox/variant.cpp
  • ~/.arduino15/packages/adafruit/hardware/nrf52/0.21.0/cores/nRF5/Udp.h

Whenever a new version is installed, remember to copy these files into the new version directory. For example, new version is x.yy.z These files must be copied into the directory:

  • ~/.arduino15/packages/adafruit/hardware/nrf52/x.yy.z/platform.txt
  • ~/.arduino15/packages/adafruit/hardware/nrf52/x.yy.z/boards.txt
  • ~/.arduino15/packages/adafruit/hardware/nrf52/x.yy.z/variants/NINA_B302_ublox/variant.h
  • ~/.arduino15/packages/adafruit/hardware/nrf52/x.yy.z/variants/NINA_B302_ublox/variant.cpp
  • ~/.arduino15/packages/adafruit/hardware/nrf52/x.yy.z/variants/NINA_B112_ublox/variant.h
  • ~/.arduino15/packages/adafruit/hardware/nrf52/x.yy.z/variants/NINA_B112_ublox/variant.cpp
  • ~/.arduino15/packages/adafruit/hardware/nrf52/x.yy.z/cores/nRF5/Udp.h
  1. To be able to compile and run on Teensy boards, you have to copy the file Teensy boards.txt into Teensy hardware directory (./arduino-1.8.12/hardware/teensy/avr/boards.txt).

Supposing the Arduino version is 1.8.12. This file must be copied into the directory:

  • ./arduino-1.8.12/hardware/teensy/avr/boards.txt

Whenever a new version is installed, remember to copy this file into the new version directory. For example, new version is x.yy.zz This file must be copied into the directory:

  • ./arduino-x.yy.zz/hardware/teensy/avr/boards.txt
  1. To be able to compile and run on SAM DUE boards, you have to copy the whole SAM DUE directory into Arduino sam directory (~/.arduino15/packages/arduino/hardware/sam/1.6.12).

Supposing the Arduino SAM core version is 1.6.12. This file must be copied into the directory:

  • ~/.arduino15/packages/arduino/hardware/sam/1.6.12/platform.txt

Whenever a new version is installed, remember to copy this file into the new version directory. For example, new version is x.yy.zz This file must be copied into the directory:

  • ~/.arduino15/packages/arduino/hardware/sam/x.yy.zz/platform.txt
  1. To be able to compile without error and automatically detect and display BOARD_NAME on Arduino SAMD (Nano-33-IoT, etc) boards, you have to copy the whole Arduino SAMD cores 1.8.9 directory into Arduino SAMD directory (~/.arduino15/packages/arduino/hardware/samd/1.8.9).

Supposing the Arduino SAMD version is 1.8.9. These files must be copied into the directory:

  • ~/.arduino15/packages/arduino/hardware/samd/1.8.9/platform.txt
  • ~/.arduino15/packages/arduino/hardware/samd/1.8.9/cores/arduino/Arduino.h

Whenever a new version is installed, remember to copy these files into the new version directory. For example, new version is x.yy.z

These files must be copied into the directory:

  • ~/.arduino15/packages/arduino/hardware/samd/x.yy.z/platform.txt
  • ~/.arduino15/packages/arduino/hardware/samd/x.yy.z/cores/arduino/Arduino.h

This is mandatory to fix the notorious Arduino SAMD compiler error. See Improve Arduino compatibility with the STL (min and max macro)

 ...\arm-none-eabi\include\c++\7.2.1\bits\stl_algobase.h:243:56: error: macro "min" passed 3 arguments, but takes just 2
     min(const _Tp& __a, const _Tp& __b, _Compare __comp)

Whenever the above-mentioned compiler error issue is fixed with the new Arduino SAMD release, you don't need to copy the Arduino.h file anymore.

  1. To be able to automatically detect and display BOARD_NAME on Adafruit SAMD (Itsy-Bitsy M4, etc) boards, you have to copy the file Adafruit SAMD platform.txt into Adafruit samd directory (~/.arduino15/packages/adafruit/hardware/samd/1.6.4).

Supposing the Adafruit SAMD core version is 1.6.4. This file must be copied into the directory:

  • ~/.arduino15/packages/adafruit/hardware/samd/1.6.4/platform.txt

Whenever a new version is installed, remember to copy this file into the new version directory. For example, new version is x.yy.zz This file must be copied into the directory:

  • ~/.arduino15/packages/adafruit/hardware/samd/x.yy.zz/platform.txt
  1. To be able to automatically detect and display BOARD_NAME on Seeeduino SAMD (XIAO M0, Wio Terminal, etc) boards, you have to copy the file Seeeduino SAMD platform.txt into Adafruit samd directory (~/.arduino15/packages/Seeeduino/hardware/samd/1.8.1).

Supposing the Seeeduino SAMD core version is 1.8.1. This file must be copied into the directory:

  • ~/.arduino15/packages/Seeeduino/hardware/samd/1.8.1/platform.txt

Whenever a new version is installed, remember to copy this file into the new version directory. For example, new version is x.yy.zz This file must be copied into the directory:

  • ~/.arduino15/packages/Seeeduino/hardware/samd/x.yy.zz/platform.txt
  1. To use Serial1 on some STM32 boards without Serial1 definition (Nucleo-144 NUCLEO_F767ZI, Nucleo-64 NUCLEO_L053R8, etc.) boards, you have to copy the files STM32 variant.h into STM32 stm32 directory (~/.arduino15/packages/STM32/hardware/stm32/1.9.0). You have to modify the files corresponding to your boards, this is just an illustration how to do.

Supposing the STM32 stm32 core version is 1.9.0. These files must be copied into the directory:

  • ~/.arduino15/packages/STM32/hardware/stm32/1.9.0/variants/NUCLEO_F767ZI/variant.h for Nucleo-144 NUCLEO_F767ZI.
  • ~/.arduino15/packages/STM32/hardware/stm32/1.9.0/variants/NUCLEO_L053R8/variant.h for Nucleo-64 NUCLEO_L053R8.

Whenever a new version is installed, remember to copy this file into the new version directory. For example, new version is x.yy.zz, theses files must be copied into the corresponding directory:

  • ~/.arduino15/packages/STM32/hardware/stm32/x.yy.zz/variants/NUCLEO_F767ZI/variant.h
  • ~/.arduino15/packages/STM32/hardware/stm32/x.yy.zz/variants/NUCLEO_L053R8/variant.h

Libraries' Patches

  1. If your application requires 2K+ HTML page, the current Ethernet library must be modified if you are using W5200/W5500 Ethernet shields. W5100 is not supported for 2K+ buffer. If you use boards requiring different CS/SS pin for W5x00 Ethernet shield, for example ESP32, ESP8266, nRF52, etc., you also have to modify the following libraries to be able to specify the CS/SS pin correctly.

  2. To fix Ethernet library, just copy these following files into the Ethernet library directory to overwrite the old files:

  1. To fix EthernetLarge library, just copy these following files into the EthernetLarge library directory to overwrite the old files:
  1. To fix Ethernet2 library, just copy these following files into the Ethernet2 library directory to overwrite the old files:

To add UDP Multicast support, necessary for this UPnP_Generic library:

  1. To fix Ethernet3 library, just copy these following files into the Ethernet3 library directory to overwrite the old files:
  1. To be able to compile and run on nRF52 boards with ENC28J60 using UIPEthernet library, you have to copy these following files into the UIPEthernet utility directory to overwrite the old files:
  1. To fix ESP32 compile error, just copy the following file into the ESP32 cores/esp32 directory (e.g. ./arduino-1.8.12/hardware/espressif/cores/esp32) to overwrite the old file:

HOWTO Use analogRead() with ESP32 running WiFi and/or BlueTooth (BT/BLE)

Please have a look at ESP_WiFiManager Issue 39: Not able to read analog port when using the autoconnect example to have more detailed description and solution of the issue.

1. ESP32 has 2 ADCs, named ADC1 and ADC2

2. ESP32 ADCs functions

  • ADC1 controls ADC function for pins GPIO32-GPIO39
  • ADC2 controls ADC function for pins GPIO0, 2, 4, 12-15, 25-27

3.. ESP32 WiFi uses ADC2 for WiFi functions

Look in file adc_common.c

In ADC2, there're two locks used for different cases:

  1. lock shared with app and Wi-Fi: ESP32: When Wi-Fi using the ADC2, we assume it will never stop, so app checks the lock and returns immediately if failed. ESP32S2: The controller's control over the ADC is determined by the arbiter. There is no need to control by lock.

  2. lock shared between tasks: when several tasks sharing the ADC2, we want to guarantee all the requests will be handled. Since conversions are short (about 31us), app returns the lock very soon, we use a spinlock to stand there waiting to do conversions one by one.

adc2_spinlock should be acquired first, then adc2_wifi_lock or rtc_spinlock.

  • In order to use ADC2 for other functions, we have to acquire complicated firmware locks and very difficult to do
  • So, it's not advisable to use ADC2 with WiFi/BlueTooth (BT/BLE).
  • Use ADC1, and pins GPIO32-GPIO39
  • If somehow it's a must to use those pins serviced by ADC2 (GPIO0, 2, 4, 12, 13, 14, 15, 25, 26 and 27), use the fix mentioned at the end of ESP_WiFiManager Issue 39: Not able to read analog port when using the autoconnect example to work with ESP32 WiFi/BlueTooth (BT/BLE).

Configuration Notes

1. How to select which built-in Ethernet or shield to use

The easiest way is to use

#define USE_ETHERNET_WRAPPER    true

then select one and only one Ethernet library to use as follows:

  • Standard W5x00 Ethernet library is used by default, in the sketch, just be sure to comment out or leave these #defines to be false :
#define USE_UIP_ETHERNET        false
#define USE_CUSTOM_ETHERNET     false

// Only one if the following to be true
#define USE_ETHERNET            false
#define USE_ETHERNET2           false //true
#define USE_ETHERNET3           false //true
#define USE_ETHERNET_LARGE      false
#define USE_ETHERNET_ESP8266    false //true
#define USE_ETHERNET_ENC        false

To use W5x00 Ethernet, for example using EthernetLarge library

#define USE_UIP_ETHERNET        false
#define USE_CUSTOM_ETHERNET     false

// Only one if the following to be true
#define USE_ETHERNET            false
#define USE_ETHERNET2           false //true
#define USE_ETHERNET3           false //true
#define USE_ETHERNET_LARGE      true
#define USE_ETHERNET_ESP8266    false //true
#define USE_ETHERNET_ENC        false
  • To use ENC28J60 Ethernet, using EthernetENC library (NEW and Better)
#define USE_UIP_ETHERNET        false
#define USE_CUSTOM_ETHERNET     false

// Only one if the following to be true
#define USE_ETHERNET            false
#define USE_ETHERNET2           false //true
#define USE_ETHERNET3           false //true
#define USE_ETHERNET_LARGE      false
#define USE_ETHERNET_ESP8266    false //true
#define USE_ETHERNET_ENC        true
  • To use ENC28J60 Ethernet, using UIPEthernet library:
#define USE_UIP_ETHERNET        true
#define USE_CUSTOM_ETHERNET     false

// Only one if the following to be true
#define USE_ETHERNET            false
#define USE_ETHERNET2           false //true
#define USE_ETHERNET3           false //true
#define USE_ETHERNET_LARGE      false
#define USE_ETHERNET_ESP8266    false //true
#define USE_ETHERNET_ENC        false
  • To use any of the Ethernet libraries, such as Ethernet2, Ethernet3, EthernetLarge, EthernetENC:
#define USE_UIP_ETHERNET        false
#define USE_CUSTOM_ETHERNET     false

// Only one if the following to be true
#define USE_ETHERNET            false
#define USE_ETHERNET2           false //true
#define USE_ETHERNET3           true  //true
#define USE_ETHERNET_LARGE      false
#define USE_ETHERNET_ESP8266    false //true
#define USE_ETHERNET_ENC        false
  • To use another Ethernet library For example, Ethernet_XYZ library uses Ethernet_XYZ.h
#define USE_UIP_ETHERNET        false
#define USE_CUSTOM_ETHERNET     true

// Only one if the following to be true
#define USE_ETHERNET            false
#define USE_ETHERNET2           false //true
#define USE_ETHERNET3           false  //true
#define USE_ETHERNET_LARGE      false
#define USE_ETHERNET_ESP8266    false //true
#define USE_ETHERNET_ENC        false

//Must be placed before #include <EthernetWebServer.h>
#include <Ethernet_XYZ.h>
...

#include <EthernetWebServer.h>

Important:

  • The Ethernet_Shield_W5200, EtherCard, EtherSia libraries are not supported. Don't use unless you know how to modify those libraries.
  • Requests to support for any future custom Ethernet library will be ignored. Use at your own risk.

2. How to select another CS/SS pin to use

The default CS/SS pin is GPIO4(D2) for ESP8266, GPIO22 for ESP32, 10 for all other boards.

If the default pin is not corect, the easiest way is to change is to use

#define USE_ETHERNET_WRAPPER    true

then select the CS/SS pin (e.g. 22) to use as follows:

// To override the default CS/SS pin. Don't use unless you know exactly which pin to use
#define USE_THIS_SS_PIN   22

3. How to use W5x00 with ESP8266

To avoid using the default but not-working Ethernet library of ESP8266, rename the Ethernet.h/cpp to Ethernet_ESP8266.h/cpp to avoid library conflict if you're using the Arduino Ethernet library. The Ethernet2, Ethernet3, EthernetLarge library can be used without conflict.

These pins are tested OK with ESP8266 and W5x00

  // For ESP8266
  // Pin                D0(GPIO16)    D1(GPIO5)    D2(GPIO4)    D3(GPIO0)    D4(GPIO2)    D8
  // Ethernet           0                 X            X            X            X        0
  // Ethernet2          X                 X            X            X            X        0
  // Ethernet3          X                 X            X            X            X        0
  // EthernetLarge      X                 X            X            X            X        0
  // Ethernet_ESP8266   0                 0            0            0            0        0
  // D2 is safe to used for Ethernet, Ethernet2, Ethernet3, EthernetLarge libs
  // Must use library patch for Ethernet, EthernetLarge libraries
  //Ethernet.setCsPin (USE_THIS_SS_PIN);
  Ethernet.init (USE_THIS_SS_PIN);

4. How to increase W5x00 TX/RX buffer

  • For Ethernet3 library only, use as follows
  // Use  MAX_SOCK_NUM = 4 for 4K, 2 for 8K, 1 for 16K RX/TX buffer
  #ifndef ETHERNET3_MAX_SOCK_NUM
    #define ETHERNET3_MAX_SOCK_NUM      4
  #endif
  
  Ethernet.setCsPin (USE_THIS_SS_PIN);
  Ethernet.init (ETHERNET3_MAX_SOCK_NUM);

5. How to adjust sendContent_P() and send_P() buffer size

sendContent_P() and send_P() buffer size is set default at 4 Kbytes, and minimum is 256 bytes. If you need to change, just add a definition, e.g.:

#define SENDCONTENT_P_BUFFER_SZ     2048

Note that the buffer size must be larger than 256 bytes. See Sending GZIP HTML ~ 120kb+ (suggested enhancement).

Usage

Init the CS/SS pin if use EthernetWrapper

EthernetInit();

Class Constructor

  EthernetWebServer server(80);

Creates the EthernetWebServer class object.

Parameters:

host port number: int port (default is the standard HTTP port 80)

Basic Operations

Starting the server

  void begin();

Handling incoming client requests

  void handleClient();

Disabling the server

  void close();
  void stop();

Both methods function the same

Client request handlers

  void on();
  void addHandler();
  void onNotFound();
  void onFileUpload();

Example:

  server.on("/", handlerFunction);
  server.onNotFound(handlerFunction);   // called when handler is not assigned
  server.onFileUpload(handlerFunction); // handle file uploads

Sending responses to the client

  void send();
  void send_P();

Parameters:

code - HTTP response code, can be 200 or 404, etc.

content_type - HTTP content type, like "text/plain" or "image/png", etc.

content - actual content body

Advanced Options

Getting information about request arguments

  const String & arg();
  const String & argName();
  int args();
  bool hasArg();

Function usage:

arg - get request argument value, use arg("plain") to get POST body

argName - get request argument name

args - get arguments count

hasArg - check if argument exist

Getting information about request headers

  const String & header();
  const String & headerName();
  const String & hostHeader();
  int headers();
  bool hasHeader();

Function usage:

header - get request header value

headerName - get request header name

hostHeader - get request host header if available, else empty string

headers - get header count

hasHeader - check if header exist

Authentication

  bool authenticate();
  void requestAuthentication();

Function usage:

authenticate - server authentication, returns true if client is authenticated else false

requestAuthentication - sends authentication failure response to the client

Example Usage:

  if(!server.authenticate(username, password)){
    server.requestAuthentication();
  }

Other Function Calls

  const String & uri(); // get the current uri
  HTTPMethod  method(); // get the current method 
  WiFiClient client(); // get the current client
  HTTPUpload & upload(); // get the current upload
  void setContentLength(); // set content length
  void sendHeader(); // send HTTP header
  void sendContent(); // send content
  void sendContent_P(); 
  void collectHeaders(); // set the request headers to collect
  void serveStatic();
  size_t streamFile();

Examples:

  1. AdvancedWebServer
  2. HelloServer
  3. HelloServer2
  4. HttpBasicAuth
  5. PostServer
  6. SimpleAuthentication
  7. UdpNTPClient
  8. UdpSendReceive
  9. WebClient
  10. WebClientRepeating
  11. WebServer

Example AdvancedWebServer

1. File AdvancedWebServer.ino

/*
   The Arduino board communicates with the shield using the SPI bus. This is on digital pins 11, 12, and 13 on the Uno
   and pins 50, 51, and 52 on the Mega. On both boards, pin 10 is used as SS. On the Mega, the hardware SS pin, 53,
   is not used to select the Ethernet controller chip, but it must be kept as an output or the SPI interface won't work.
*/

#include "defines.h"

EthernetWebServer server(80);

int reqCount = 0;                // number of requests received

void handleRoot()
{
#define BUFFER_SIZE     400
  
  char temp[BUFFER_SIZE];
  int sec = millis() / 1000;
  int min = sec / 60;
  int hr = min / 60;
  int day = hr / 24;

  snprintf(temp, BUFFER_SIZE - 1,
           "<html>\
<head>\
<meta http-equiv='refresh' content='5'/>\
<title>AdvancedWebServer %s</title>\
<style>\
body { background-color: #cccccc; font-family: Arial, Helvetica, Sans-Serif; Color: #000088; }\
</style>\
</head>\
<body>\
<h2>Hi from EthernetWebServer!</h2>\
<h3>on %s</h3>\
<p>Uptime: %d d %02d:%02d:%02d</p>\
<img src=\"/test.svg\" />\
</body>\
</html>", BOARD_NAME, BOARD_NAME, day, hr % 24, min % 60, sec % 60);

  server.send(200, F("text/html"), temp);
}

void handleNotFound()
{
  String message = F("File Not Found\n\n");
  
  message += F("URI: ");
  message += server.uri();
  message += F("\nMethod: ");
  message += (server.method() == HTTP_GET) ? F("GET") : F("POST");
  message += F("\nArguments: ");
  message += server.args();
  message += F("\n");
  
  for (uint8_t i = 0; i < server.args(); i++)
  {
    message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
  }
  
  server.send(404, F("text/plain"), message);
}

void drawGraph()
{
  String out;
  out.reserve(3000);
  char temp[70];
  
  out += F("<svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\" width=\"310\" height=\"150\">\n");
  out += F("<rect width=\"310\" height=\"150\" fill=\"rgb(250, 230, 210)\" stroke-width=\"1\" stroke=\"rgb(0, 0, 0)\" />\n");
  out += F("<g stroke=\"black\">\n");
  int y = rand() % 130;

  for (int x = 10; x < 300; x += 10)
  {
    int y2 = rand() % 130;
    sprintf(temp, "<line x1=\"%d\" y1=\"%d\" x2=\"%d\" y2=\"%d\" stroke-width=\"1\" />\n", x, 140 - y, x + 10, 140 - y2);
    out += temp;
    y = y2;
  }
  out += F("</g>\n</svg>\n");

  server.send(200, F("image/svg+xml"), out);
}

void setup(void)
{
  Serial.begin(115200);
  while (!Serial);

  Serial.print("\nStarting AdvancedWebServer on " + String(BOARD_NAME));
  Serial.println(" with " + String(SHIELD_TYPE));

#if USE_ETHERNET_WRAPPER

  EthernetInit();

#else

#if USE_ETHERNET
  ET_LOGWARN(F("=========== USE_ETHERNET ==========="));
#elif USE_ETHERNET2
  ET_LOGWARN(F("=========== USE_ETHERNET2 ==========="));
#elif USE_ETHERNET3
  ET_LOGWARN(F("=========== USE_ETHERNET3 ==========="));
#elif USE_ETHERNET_LARGE
  ET_LOGWARN(F("=========== USE_ETHERNET_LARGE ==========="));
#elif USE_ETHERNET_ESP8266
  ET_LOGWARN(F("=========== USE_ETHERNET_ESP8266 ==========="));
#else
  ET_LOGWARN(F("========================="));
#endif

  ET_LOGWARN(F("Default SPI pinout:"));
  ET_LOGWARN1(F("MOSI:"), MOSI);
  ET_LOGWARN1(F("MISO:"), MISO);
  ET_LOGWARN1(F("SCK:"),  SCK);
  ET_LOGWARN1(F("SS:"),   SS);
  ET_LOGWARN(F("========================="));

#if defined(ESP8266)
  // For ESP8266, change for other boards if necessary
  #ifndef USE_THIS_SS_PIN
    #define USE_THIS_SS_PIN   D2    // For ESP8266
  #endif

  ET_LOGWARN1(F("ESP8266 setCsPin:"), USE_THIS_SS_PIN);

  #if ( USE_ETHERNET || USE_ETHERNET_LARGE || USE_ETHERNET2 || USE_ETHERNET_ENC )
    // For ESP8266
    // Pin                D0(GPIO16)    D1(GPIO5)    D2(GPIO4)    D3(GPIO0)    D4(GPIO2)    D8
    // Ethernet           0                 X            X            X            X        0
    // Ethernet2          X                 X            X            X            X        0
    // Ethernet3          X                 X            X            X            X        0
    // EthernetLarge      X                 X            X            X            X        0
    // Ethernet_ESP8266   0                 0            0            0            0        0
    // D2 is safe to used for Ethernet, Ethernet2, Ethernet3, EthernetLarge libs
    // Must use library patch for Ethernet, EthernetLarge libraries
    Ethernet.init (USE_THIS_SS_PIN);

  #elif USE_ETHERNET3
    // Use  MAX_SOCK_NUM = 4 for 4K, 2 for 8K, 1 for 16K RX/TX buffer
    #ifndef ETHERNET3_MAX_SOCK_NUM
      #define ETHERNET3_MAX_SOCK_NUM      4
    #endif
  
    Ethernet.setCsPin (USE_THIS_SS_PIN);
    Ethernet.init (ETHERNET3_MAX_SOCK_NUM);

  #elif USE_CUSTOM_ETHERNET
  
    // You have to add initialization for your Custom Ethernet here
    // This is just an example to setCSPin to USE_THIS_SS_PIN, and can be not correct and enough
    Ethernet.init(USE_THIS_SS_PIN);
  
  #endif  //( USE_ETHERNET || USE_ETHERNET2 || USE_ETHERNET3 || USE_ETHERNET_LARGE )

#elif defined(ESP32)

  // You can use Ethernet.init(pin) to configure the CS pin
  //Ethernet.init(10);  // Most Arduino shields
  //Ethernet.init(5);   // MKR ETH shield
  //Ethernet.init(0);   // Teensy 2.0
  //Ethernet.init(20);  // Teensy++ 2.0
  //Ethernet.init(15);  // ESP8266 with Adafruit Featherwing Ethernet
  //Ethernet.init(33);  // ESP32 with Adafruit Featherwing Ethernet

  #ifndef USE_THIS_SS_PIN
    #define USE_THIS_SS_PIN   22    // For ESP32
  #endif

  ET_LOGWARN1(F("ESP32 setCsPin:"), USE_THIS_SS_PIN);

  // For other boards, to change if necessary
  #if ( USE_ETHERNET || USE_ETHERNET_LARGE || USE_ETHERNET2 || USE_ETHERNET_ENC )
    // Must use library patch for Ethernet, EthernetLarge libraries
    // ESP32 => GPIO2,4,5,13,15,21,22 OK with Ethernet, Ethernet2, EthernetLarge
    // ESP32 => GPIO2,4,5,15,21,22 OK with Ethernet3
  
    //Ethernet.setCsPin (USE_THIS_SS_PIN);
    Ethernet.init (USE_THIS_SS_PIN);
  
  #elif USE_ETHERNET3
    // Use  MAX_SOCK_NUM = 4 for 4K, 2 for 8K, 1 for 16K RX/TX buffer
    #ifndef ETHERNET3_MAX_SOCK_NUM
      #define ETHERNET3_MAX_SOCK_NUM      4
    #endif
  
    Ethernet.setCsPin (USE_THIS_SS_PIN);
    Ethernet.init (ETHERNET3_MAX_SOCK_NUM);

  #elif USE_CUSTOM_ETHERNET
  
    // You have to add initialization for your Custom Ethernet here
    // This is just an example to setCSPin to USE_THIS_SS_PIN, and can be not correct and enough
    Ethernet.init(USE_THIS_SS_PIN); 
  
  #endif  //( USE_ETHERNET || USE_ETHERNET2 || USE_ETHERNET3 || USE_ETHERNET_LARGE )

#else   //defined(ESP8266)
  // unknown board, do nothing, use default SS = 10
  #ifndef USE_THIS_SS_PIN
    #define USE_THIS_SS_PIN   10    // For other boards
  #endif

  ET_LOGWARN3(F("Board :"), BOARD_NAME, F(", setCsPin:"), USE_THIS_SS_PIN);

  // For other boards, to change if necessary
  #if ( USE_ETHERNET || USE_ETHERNET_LARGE || USE_ETHERNET2  || USE_ETHERNET_ENC )
    // Must use library patch for Ethernet, Ethernet2, EthernetLarge libraries
  
    Ethernet.init (USE_THIS_SS_PIN);
  
  #elif USE_ETHERNET3
    // Use  MAX_SOCK_NUM = 4 for 4K, 2 for 8K, 1 for 16K RX/TX buffer
    #ifndef ETHERNET3_MAX_SOCK_NUM
      #define ETHERNET3_MAX_SOCK_NUM      4
    #endif
  
    Ethernet.setCsPin (USE_THIS_SS_PIN);
    Ethernet.init (ETHERNET3_MAX_SOCK_NUM);

  #elif USE_CUSTOM_ETHERNET
  
    // You have to add initialization for your Custom Ethernet here
    // This is just an example to setCSPin to USE_THIS_SS_PIN, and can be not correct and enough
    Ethernet.init(USE_THIS_SS_PIN);
    
  #endif  //( USE_ETHERNET || USE_ETHERNET2 || USE_ETHERNET3 || USE_ETHERNET_LARGE )

#endif    //defined(ESP8266)


#endif  //USE_ETHERNET_WRAPPER


  // start the ethernet connection and the server:
  // Use DHCP dynamic IP and random mac
  uint16_t index = millis() % NUMBER_OF_MAC;
  // Use Static IP
  //Ethernet.begin(mac[index], ip);
  Ethernet.begin(mac[index]);

  // Just info to know how to connect correctly
  Serial.println(F("========================="));
  Serial.println(F("Currently Used SPI pinout:"));
  Serial.print(F("MOSI:"));
  Serial.println(MOSI);
  Serial.print(F("MISO:"));
  Serial.println(MISO);
  Serial.print(F("SCK:"));
  Serial.println(SCK);
  Serial.print(F("SS:"));
  Serial.println(SS);
#if USE_ETHERNET3
  Serial.print(F("SPI_CS:"));
  Serial.println(SPI_CS);
#endif
  Serial.println(F("========================="));

  Serial.print(F("Using mac index = "));
  Serial.println(index);

  Serial.print(F("Connected! IP address: "));
  Serial.println(Ethernet.localIP());

  server.on(F("/"), handleRoot);
  server.on(F("/test.svg"), drawGraph);
  server.on(F("/inline"), []()
  {
    server.send(200, F("text/plain"), F("This works as well"));
  });

  server.onNotFound(handleNotFound);
  server.begin();

  Serial.print(F("HTTP EthernetWebServer is @ IP : "));
  Serial.println(Ethernet.localIP());
}

void heartBeatPrint(void)
{
  static int num = 1;

  Serial.print(F("."));

  if (num == 80)
  {
    Serial.println();
    num = 1;
  }
  else if (num++ % 10 == 0)
  {
    Serial.print(F(" "));
  }
}

void check_status()
{
  static unsigned long checkstatus_timeout = 0;

#define STATUS_CHECK_INTERVAL     10000L

  // Send status report every STATUS_REPORT_INTERVAL (60) seconds: we don't need to send updates frequently if there is no status change.
  if ((millis() > checkstatus_timeout) || (checkstatus_timeout == 0))
  {
    heartBeatPrint();
    checkstatus_timeout = millis() + STATUS_CHECK_INTERVAL;
  }
}

void loop(void)
{
  server.handleClient();
  check_status();
}

2. File defines.h

#ifndef defines_h
#define defines_h

#define DEBUG_ETHERNET_WEBSERVER_PORT       Serial

// Debug Level from 0 to 4
#define _ETHERNET_WEBSERVER_LOGLEVEL_       3

#if    ( defined(ARDUINO_SAMD_ZERO) || defined(ARDUINO_SAMD_MKR1000) || defined(ARDUINO_SAMD_MKRWIFI1010) \
      || defined(ARDUINO_SAMD_NANO_33_IOT) || defined(ARDUINO_SAMD_MKRFox1200) || defined(ARDUINO_SAMD_MKRWAN1300) || defined(ARDUINO_SAMD_MKRWAN1310) \
      || defined(ARDUINO_SAMD_MKRGSM1400) || defined(ARDUINO_SAMD_MKRNB1500) || defined(ARDUINO_SAMD_MKRVIDOR4000) || defined(__SAMD21G18A__) \
      || defined(ARDUINO_SAMD_CIRCUITPLAYGROUND_EXPRESS) || defined(__SAMD21E18A__) || defined(__SAMD51__) || defined(__SAMD51J20A__) || defined(__SAMD51J19A__) \
      || defined(__SAMD51G19A__) || defined(__SAMD51P19A__) || defined(__SAMD21G18A__) )
  #if defined(ETHERNET_USE_SAMD)
    #undef ETHERNET_USE_SAMD
  #endif
  #define ETHERNET_USE_SAMD      true
  #endif

#if ( defined(NRF52840_FEATHER) || defined(NRF52832_FEATHER) || defined(NRF52_SERIES) || defined(ARDUINO_NRF52_ADAFRUIT) || \
        defined(NRF52840_FEATHER_SENSE) || defined(NRF52840_ITSYBITSY) || defined(NRF52840_CIRCUITPLAY) || defined(NRF52840_CLUE) || \
        defined(NRF52840_METRO) || defined(NRF52840_PCA10056) || defined(PARTICLE_XENON) || defined(NINA_B302_ublox) || defined(NINA_B112_ublox) )
  #if defined(ETHERNET_USE_NRF528XX)
    #undef ETHERNET_USE_NRF528XX
  #endif
  #define ETHERNET_USE_NRF528XX      true
#endif

#if ( defined(ARDUINO_SAM_DUE) || defined(__SAM3X8E__) )
  #if defined(ETHERNET_USE_SAM_DUE)
    #undef ETHERNET_USE_SAM_DUE
  #endif
  #define ETHERNET_USE_SAM_DUE      true
#endif

#if defined(ETHERNET_USE_SAMD)
  // For SAMD
  // Default pin 10 to SS/CS
  #define USE_THIS_SS_PIN       10
  
  #if ( defined(ARDUINO_SAMD_ZERO) && !defined(SEEED_XIAO_M0) )
    #define BOARD_TYPE      "SAMD Zero"
  #elif defined(ARDUINO_SAMD_MKR1000)
    #define BOARD_TYPE      "SAMD MKR1000"
  #elif defined(ARDUINO_SAMD_MKRWIFI1010)
    #define BOARD_TYPE      "SAMD MKRWIFI1010"
  #elif defined(ARDUINO_SAMD_NANO_33_IOT)
    #define BOARD_TYPE      "SAMD NANO_33_IOT"
  #elif defined(ARDUINO_SAMD_MKRFox1200)
    #define BOARD_TYPE      "SAMD MKRFox1200"
  #elif ( defined(ARDUINO_SAMD_MKRWAN1300) || defined(ARDUINO_SAMD_MKRWAN1310) )
    #define BOARD_TYPE      "SAMD MKRWAN13X0"
  #elif defined(ARDUINO_SAMD_MKRGSM1400)
    #define BOARD_TYPE      "SAMD MKRGSM1400"
  #elif defined(ARDUINO_SAMD_MKRNB1500)
    #define BOARD_TYPE      "SAMD MKRNB1500"
  #elif defined(ARDUINO_SAMD_MKRVIDOR4000)
    #define BOARD_TYPE      "SAMD MKRVIDOR4000"
  #elif defined(ARDUINO_SAMD_CIRCUITPLAYGROUND_EXPRESS)
    #define BOARD_TYPE      "SAMD ARDUINO_SAMD_CIRCUITPLAYGROUND_EXPRESS"
  #elif defined(ADAFRUIT_FEATHER_M0_EXPRESS)
    #define BOARD_TYPE      "SAMD21 ADAFRUIT_FEATHER_M0_EXPRESS"
  #elif defined(ADAFRUIT_METRO_M0_EXPRESS)
    #define BOARD_TYPE      "SAMD21 ADAFRUIT_METRO_M0_EXPRESS"
  #elif defined(ADAFRUIT_CIRCUITPLAYGROUND_M0)
    #define BOARD_TYPE      "SAMD21 ADAFRUIT_CIRCUITPLAYGROUND_M0"
  #elif defined(ADAFRUIT_GEMMA_M0)
    #define BOARD_TYPE      "SAMD21 ADAFRUIT_GEMMA_M0"
  #elif defined(ADAFRUIT_TRINKET_M0)
    #define BOARD_TYPE      "SAMD21 ADAFRUIT_TRINKET_M0"
  #elif defined(ADAFRUIT_ITSYBITSY_M0)
    #define BOARD_TYPE      "SAMD21 ADAFRUIT_ITSYBITSY_M0"
  #elif defined(ARDUINO_SAMD_HALLOWING_M0)
    #define BOARD_TYPE      "SAMD21 ARDUINO_SAMD_HALLOWING_M0"
  #elif defined(ADAFRUIT_METRO_M4_EXPRESS)
    #define BOARD_TYPE      "SAMD51 ADAFRUIT_METRO_M4_EXPRESS"
  #elif defined(ADAFRUIT_GRAND_CENTRAL_M4)
    #define BOARD_TYPE      "SAMD51 ADAFRUIT_GRAND_CENTRAL_M4"
  #elif defined(ADAFRUIT_FEATHER_M4_EXPRESS)
    #define BOARD_TYPE      "SAMD51 ADAFRUIT_FEATHER_M4_EXPRESS"
  #elif defined(ADAFRUIT_ITSYBITSY_M4_EXPRESS)
    #define BOARD_TYPE      "SAMD51 ADAFRUIT_ITSYBITSY_M4_EXPRESS"
    #define USE_THIS_SS_PIN       10
  #elif defined(ADAFRUIT_TRELLIS_M4_EXPRESS)
    #define BOARD_TYPE      "SAMD51 ADAFRUIT_TRELLIS_M4_EXPRESS"
  #elif defined(ADAFRUIT_PYPORTAL)
    #define BOARD_TYPE      "SAMD51 ADAFRUIT_PYPORTAL"
  #elif defined(ADAFRUIT_PYPORTAL_M4_TITANO)
    #define BOARD_TYPE      "SAMD51 ADAFRUIT_PYPORTAL_M4_TITANO"
  #elif defined(ADAFRUIT_PYBADGE_M4_EXPRESS)
    #define BOARD_TYPE      "SAMD51 ADAFRUIT_PYBADGE_M4_EXPRESS"
  #elif defined(ADAFRUIT_METRO_M4_AIRLIFT_LITE)
    #define BOARD_TYPE      "SAMD51 ADAFRUIT_METRO_M4_AIRLIFT_LITE"
  #elif defined(ADAFRUIT_PYGAMER_M4_EXPRESS)
    #define BOARD_TYPE      "SAMD51 ADAFRUIT_PYGAMER_M4_EXPRESS"
  #elif defined(ADAFRUIT_PYGAMER_ADVANCE_M4_EXPRESS)
    #define BOARD_TYPE      "SAMD51 ADAFRUIT_PYGAMER_ADVANCE_M4_EXPRESS"
  #elif defined(ADAFRUIT_PYBADGE_AIRLIFT_M4)
    #define BOARD_TYPE      "SAMD51 ADAFRUIT_PYBADGE_AIRLIFT_M4"
  #elif defined(ADAFRUIT_MONSTER_M4SK_EXPRESS)
    #define BOARD_TYPE      "SAMD51 ADAFRUIT_MONSTER_M4SK_EXPRESS"
  #elif defined(ADAFRUIT_HALLOWING_M4_EXPRESS)
    #define BOARD_TYPE      "SAMD51 ADAFRUIT_HALLOWING_M4_EXPRESS"
  #elif defined(SEEED_WIO_TERMINAL)
    #define BOARD_TYPE      "SAMD SEEED_WIO_TERMINAL"
  #elif defined(SEEED_FEMTO_M0)
    #define BOARD_TYPE      "SAMD SEEED_FEMTO_M0"
  #elif defined(SEEED_XIAO_M0)
    #define BOARD_TYPE      "SAMD SEEED_XIAO_M0"
    #ifdef USE_THIS_SS_PIN
      #undef USE_THIS_SS_PIN
    #endif
    #define USE_THIS_SS_PIN       A1
    #warning define SEEED_XIAO_M0 USE_THIS_SS_PIN == A1
  #elif defined(Wio_Lite_MG126)
    #define BOARD_TYPE      "SAMD SEEED Wio_Lite_MG126"
  #elif defined(WIO_GPS_BOARD)
    #define BOARD_TYPE      "SAMD SEEED WIO_GPS_BOARD"
  #elif defined(SEEEDUINO_ZERO)
    #define BOARD_TYPE      "SAMD SEEEDUINO_ZERO"
  #elif defined(SEEEDUINO_LORAWAN)
    #define BOARD_TYPE      "SAMD SEEEDUINO_LORAWAN"
  #elif defined(SEEED_GROVE_UI_WIRELESS)
    #define BOARD_TYPE      "SAMD SEEED_GROVE_UI_WIRELESS"
  #elif defined(__SAMD21E18A__)
    #define BOARD_TYPE      "SAMD21E18A"
  #elif defined(__SAMD21G18A__)
    #define BOARD_TYPE      "SAMD21G18A"
  #elif defined(__SAMD51G19A__)
    #define BOARD_TYPE      "SAMD51G19A"
  #elif defined(__SAMD51J19A__)
    #define BOARD_TYPE      "SAMD51J19A"
  #elif defined(__SAMD51J20A__)
    #define BOARD_TYPE      "SAMD51J20A"
  #elif defined(__SAM3X8E__)
    #define BOARD_TYPE      "SAM3X8E"
  #elif defined(__CPU_ARC__)
    #define BOARD_TYPE      "CPU_ARC"
  #elif defined(__SAMD51__)
    #define BOARD_TYPE      "SAMD51"
  #else
    #define BOARD_TYPE      "SAMD Unknown"
  #endif

#elif (ETHERNET_USE_SAM_DUE)
  // Default pin 10 to SS/CS
  #define USE_THIS_SS_PIN       10
  #define BOARD_TYPE      "SAM DUE"

#elif (ETHERNET_USE_NRF528XX)
  // Default pin 10 to SS/CS
  #define USE_THIS_SS_PIN       10

  #if defined(NRF52840_FEATHER)
    #define BOARD_TYPE      "NRF52840_FEATHER"
  #elif defined(NRF52832_FEATHER)
    #define BOARD_TYPE      "NRF52832_FEATHER"
  #elif defined(NRF52840_FEATHER_SENSE)
    #define BOARD_TYPE      "NRF52840_FEATHER_SENSE"
  #elif defined(NRF52840_ITSYBITSY)
    #define BOARD_TYPE      "NRF52840_ITSYBITSY"
    #define USE_THIS_SS_PIN   10    // For other boards
  #elif defined(NRF52840_CIRCUITPLAY)
    #define BOARD_TYPE      "NRF52840_CIRCUITPLAY"
  #elif defined(NRF52840_CLUE)
    #define BOARD_TYPE      "NRF52840_CLUE"
  #elif defined(NRF52840_METRO)
    #define BOARD_TYPE      "NRF52840_METRO"
  #elif defined(NRF52840_PCA10056)
    #define BOARD_TYPE      "NRF52840_PCA10056"
  #elif defined(NINA_B302_ublox)
    #define BOARD_TYPE      "NINA_B302_ublox"
  #elif defined(NINA_B112_ublox)
    #define BOARD_TYPE      "NINA_B112_ublox"
  #elif defined(PARTICLE_XENON)
    #define BOARD_TYPE      "PARTICLE_XENON"
  #elif defined(ARDUINO_NRF52_ADAFRUIT)
    #define BOARD_TYPE      "ARDUINO_NRF52_ADAFRUIT"
  #else
    #define BOARD_TYPE      "nRF52 Unknown"
  #endif

#elif ( defined(CORE_TEENSY) )
  // Default pin 10 to SS/CS
  #define USE_THIS_SS_PIN       10
  
  #if defined(__IMXRT1062__)
    // For Teensy 4.1/4.0
    #define BOARD_TYPE      "TEENSY 4.1/4.0"
  #elif defined(__MK66FX1M0__)
    #define BOARD_TYPE "Teensy 3.6"
  #elif defined(__MK64FX512__)
    #define BOARD_TYPE "Teensy 3.5"
  #elif defined(__MKL26Z64__)
    #define BOARD_TYPE "Teensy LC"
  #elif defined(__MK20DX256__)
    #define BOARD_TYPE "Teensy 3.2" // and Teensy 3.1 (obsolete)
  #elif defined(__MK20DX128__)
    #define BOARD_TYPE "Teensy 3.0"
  #elif defined(__AVR_AT90USB1286__)
    #error Teensy 2.0++ not supported yet
  #elif defined(__AVR_ATmega32U4__)
    #error Teensy 2.0 not supported yet
  #else
    // For Other Boards
    #define BOARD_TYPE      "Unknown Teensy Board"
  #endif

#elif ( defined(ESP8266) )
  // For ESP8266
  #warning Use ESP8266 architecture
  #include <ESP8266mDNS.h>
  #define ETHERNET_USE_ESP8266
  #define BOARD_TYPE      "ESP8266"

#elif ( defined(ESP32) )
  // For ESP32
  #warning Use ESP32 architecture
  #define ETHERNET_USE_ESP32
  #define BOARD_TYPE      "ESP32"
  
  #define W5500_RST_PORT   21

#else
  // For Mega
  // Default pin 10 to SS/CS
  #define USE_THIS_SS_PIN       10

  // Reduce size for Mega
  #define SENDCONTENT_P_BUFFER_SZ     512
  
  #define BOARD_TYPE            "AVR Mega"
#endif

#ifndef BOARD_NAME
  #define BOARD_NAME    BOARD_TYPE
#endif

#include <SPI.h>

//#define USE_ETHERNET_WRAPPER    true
#define USE_ETHERNET_WRAPPER    false

// Use true  for ENC28J60 and UIPEthernet library (https://github.com/UIPEthernet/UIPEthernet)
// Use false for W5x00 and Ethernetx library      (https://www.arduino.cc/en/Reference/Ethernet)

//#define USE_UIP_ETHERNET   true
#define USE_UIP_ETHERNET   false

//#define USE_CUSTOM_ETHERNET     true

// Note: To rename ESP628266 Ethernet lib files to Ethernet_ESP8266.h and Ethernet_ESP8266.cpp
// In order to USE_ETHERNET_ESP8266
#if ( !defined(USE_UIP_ETHERNET) || !USE_UIP_ETHERNET )

  // To override the default CS/SS pin. Don't use unless you know exactly which pin to use
  // You can define here or customize for each board at same place with BOARD_TYPE
  // Check @ defined(SEEED_XIAO_M0)
  //#define USE_THIS_SS_PIN   22  //21  //5 //4 //2 //15
  
  // Only one if the following to be true
  #define USE_ETHERNET          false //true
  #define USE_ETHERNET2         false //true
  #define USE_ETHERNET3         false //true
  #define USE_ETHERNET_LARGE    true
  #define USE_ETHERNET_ESP8266  false //true
  #define USE_ETHERNET_ENC      false
  #define USE_CUSTOM_ETHERNET   false
  
  #if !USE_ETHERNET_WRAPPER
  
    #if ( USE_ETHERNET2 || USE_ETHERNET3 || USE_ETHERNET_LARGE || USE_ETHERNET_ESP8266 || USE_ETHERNET_ENC )
      #ifdef USE_CUSTOM_ETHERNET
        #undef USE_CUSTOM_ETHERNET
      #endif
      #define USE_CUSTOM_ETHERNET   false //true
    #endif
    
    #if USE_ETHERNET3
      #include "Ethernet3.h"
      #warning Using Ethernet3 lib
      #define SHIELD_TYPE           "W5x00 using Ethernet3 Library"
    #elif USE_ETHERNET2
      #include "Ethernet2.h"
      #warning Using Ethernet2 lib
      #define SHIELD_TYPE           "W5x00 using Ethernet2 Library"
    #elif USE_ETHERNET_LARGE
      #include "EthernetLarge.h"
      #warning Using EthernetLarge lib
      #define SHIELD_TYPE           "W5x00 using EthernetLarge Library"
    #elif USE_ETHERNET_ESP8266
      #include "Ethernet_ESP8266.h"
      #warning Using Ethernet_ESP8266 lib 
      #define SHIELD_TYPE           "W5x00 using Ethernet_ESP8266 Library" 
    #elif USE_ETHERNET_ENC
      #include "EthernetENC.h"
      #warning Using EthernetENC lib
      #define SHIELD_TYPE           "ENC28J60 using EthernetENC Library"
    #elif USE_CUSTOM_ETHERNET
      //#include "Ethernet_XYZ.h"
      #include "EthernetENC.h"
      #warning Using Custom Ethernet library. You must include a library and initialize.
      #define SHIELD_TYPE           "Custom Ethernet using Ethernet_XYZ Library"
    #else
      #define USE_ETHERNET          true
      #include "Ethernet.h"
      #warning Using Ethernet lib
      #define SHIELD_TYPE           "W5x00 using Ethernet Library"
    #endif
    
    // Ethernet_Shield_W5200, EtherCard, EtherSia not supported
    // Select just 1 of the following #include if uncomment #define USE_CUSTOM_ETHERNET
    // Otherwise, standard Ethernet library will be used for W5x00
  
  #endif    //  USE_ETHERNET_WRAPPER
#elif USE_UIP_ETHERNET
    #include "UIPEthernet.h"
    #warning Using UIPEthernet library
    #define SHIELD_TYPE           "ENC28J60 using UIPEthernet Library"
#endif      // #if !USE_UIP_ETHERNET

#include <EthernetWebServer.h>

#ifndef SHIELD_TYPE
  #define SHIELD_TYPE     "Unknown Ethernet shield/library" 
#endif

// Enter a MAC address and IP address for your controller below.
#define NUMBER_OF_MAC      20

byte mac[][NUMBER_OF_MAC] =
{
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x01 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x02 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x03 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x04 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x05 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x06 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x07 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x08 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x09 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x0A },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x0B },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x0C },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x0D },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x0E },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x0F },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x10 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x11 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x12 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x13 },
  { 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x14 },
};

// Select the IP address according to your local network
IPAddress ip(192, 168, 2, 222);

#endif    //defines_h

Debug Termimal Output Samples

  1. The following are debug terminal output and screen shot when running example AdvancedWebServer on Adafruit NRF52840_FEATHER_EXPRESS with ENC28J60 using EthernetENC Library

Starting AdvancedWebServer on NRF52840_FEATHER with ENC28J60 using EthernetENC Library
[ETHERNET_WEBSERVER] =========================
[ETHERNET_WEBSERVER] Default SPI pinout:
[ETHERNET_WEBSERVER] MOSI: 25
[ETHERNET_WEBSERVER] MISO: 24
[ETHERNET_WEBSERVER] SCK: 26
[ETHERNET_WEBSERVER] SS: 5
[ETHERNET_WEBSERVER] =========================
[ETHERNET_WEBSERVER] Board : NRF52840_FEATHER , setCsPin: 10
=========================
Currently Used SPI pinout:
MOSI:25
MISO:24
SCK:26
SS:5
=========================
Using mac index = 11
Connected! IP address: 192.168.2.96
HTTP EthernetWebServer is @ IP : 192.168.2.96
EthernetWebServer::handleClient: New Client
method:  GET
url:  /
search:
headerName: Host
headerValue: 192.168.2.113
headerName: Connection
headerValue: keep-alive
headerName: DNT
headerValue: 1
headerName: Upgrade-Insecure-Requests
headerValue: 1
headerName: User-Agent
headerValue: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.89 Safari/537.36
headerName: Accept
headerValue: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
headerName: Accept-Encoding
headerValue: gzip, deflate
headerName: Accept-Language
headerValue: en-GB,en-US;q=0.9,en;q=0.8
args:
args count:  0
args:
args count:  0
Request: /
Arguments: 
Final list of key/value pairs:
EthernetWebServer::_handleRequest handle
EthernetWebServer::send1: len =  347
content =  <html><head><meta http-equiv='refresh' content='5'/><title>AdvancedWebServer NRF52840_FEATHER</title><style>body { background-color: #cccccc; font-family: Arial, Helvetica, Sans-Serif; Color: #000088; }</style></head><body><h2>Hi from EthernetWebServer!</h2><h3>on NRF52840_FEATHER</h3><p>Uptime: 0 d 00:00:11</p><img src="/test.svg" /></body></html>
EthernetWebServer::_prepareHeader sendHeader Conn close
EthernetWebServer::send1: write header =  HTTP/1.1 200 OK
Content-Type: text/html
Content-Length: 347
Connection: close


EthernetWebServer::sendContent: Client.write content:  <html><head><meta http-equiv='refresh' content='5'/><title>AdvancedWebServer NRF52840_FEATHER</title><style>body { background-color: #cccccc; font-family: Arial, Helvetica, Sans-Serif; Color: #000088; }</style></head><body><h2>Hi from EthernetWebServer!</h2><h3>on NRF52840_FEATHER</h3><p>Uptime: 0 d 00:00:11</p><img src="/test.svg" /></body></html>
EthernetWebServer::_handleRequest OK
EthernetWebServer::handleClient: Client disconnected
EthernetWebServer::handleClient: Don't keepCurrentClient
EthernetWebServer::handleClient: Client disconnected
EthernetWebServer::handleClient: New Client
method:  GET
url:  /test.svg
search:
headerName: Host
headerValue: 192.168.2.113
headerName: Connection
headerValue: keep-alive
headerName: User-Agent
headerValue: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.89 Safari/537.36
headerName: DNT
headerValue: 1
headerName: Accept
headerValue: image/webp,image/apng,image/*,*/*;q=0.8
headerName: Referer
headerValue: http://192.168.2.113/
headerName: Accept-Encoding
headerValue: gzip, deflate
headerName: Accept-Language
headerValue: en-GB,en-US;q=0.9,en;q=0.8
args:
args count:  0
args:
args count:  0
Request: /test.svg
Arguments: 
Final list of key/value pairs:
EthernetWebServer::_handleRequest handle
EthernetWebServer::send1: len =  1950
content =  <svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="310" height="150">
<rect width="310" height="150" fill="rgb(250, 230, 210)" stroke-width="1" stroke="rgb(0, 0, 0)" />
<g stroke="black">
<line x1="10" y1="98" x2="20" y2="111" stroke-width="1" />
<line x1="20" y1="111" x2="30" y2="90" stroke-width="1" />
<line x1="30" y1="90" x2="40" y2="22" stroke-width="1" />
<line x1="40" y1="22" x2="50" y2="98" stroke-width="1" />
<line x1="50" y1="98" x2="60" y2="64" stroke-width="1" />
<line x1="60" y1="64" x2="70" y2="104" stroke-width="1" />
<line x1="70" y1="104" x2="80" y2="31" stroke-width="1" />
<line x1="80" y1="31" x2="90" y2="59" stroke-width="1" />
<line x1="90" y1="59" x2="100" y2="139" stroke-width="1" />
<line x1="100" y1="139" x2="110" y2="117" stroke-width="1" />
<line x1="110" y1="117" x2="120" y2="75" stroke-width="1" />
<line x1="120" y1="75" x2="130" y2="72" stroke-width="1" />
<line x1="130" y1="72" x2="140" y2="137" stroke-width="1" />
<line x1="140" y1="137" x2="150" y2="20" stroke-width="1" />
<line x1="150" y1="20" x2="160" y2="94" stroke-width="1" />
<line x1="160" y1="94" x2="170" y2="81" stroke-width="1" />
<line x1="170" y1="81" x2="180" y2="38" stroke-width="1" />
<line x1="180" y1="38" x2="190" y2="33" stroke-width="1" />
<line x1="190" y1="33" x2="200" y2="53" stroke-width="1" />
<line x1="200" y1="53" x2="210" y2="88" stroke-width="1" />
<line x1="210" y1="88" x2="220" y2="32" stroke-width="1" />
<line x1="220" y1="32" x2="230" y2="110" stroke-width="1" />
<line x1="230" y1="110" x2="240" y2="87" stroke-width="1" />
<line x1="240" y1="87" x2="250" y2="11" stroke-width="1" />
<line x1="250" y1="11" x2="260" y2="98" stroke-width="1" />
<line x1="260" y1="98" x2="270" y2="76" stroke-width="1" />
<line x1="270" y1="76" x2="280" y2="121" stroke-width="1" />
<line x1="280" y1="121" x2="290" y2="139" stroke-width="1" />
<line x1="290" y1="139" x2="300" y2="103" stroke-width="1" />
</g>
</svg>

EthernetWebServer::_prepareHeader sendHeader Conn close
EthernetWebServer::send1: write header =  HTTP/1.1 200 OK
Content-Type: image/svg+xml
Content-Length: 1950
Connection: close
  1. The terminal output of ESP32 running a ENC28J60_WM_Config example of BlynkEthernet_WM Library
Start ENC28J60_WM_Config on ESP32
[38] EEPROMsz:1024
[38] CCSum=0x29f2,RCSum=0x29f2
[38] CrCCsum=0,CrRCsum=0
[38] Hdr=ENC28J60,BName=ESP32-ENC28J60-WM
[38] Svr=account.duckdns.org,Tok=token
[45] Svr1=account.ddns.net,Tok1=token1
[51] Prt=8080,SIP=blank
[53] MAC:FE-80-D6-B4-FC-EE
ENC28J60_CONTROL_CS =13
SS =5
SPI_MOSI =23
SPI_MISO =19
SPI_SCK =18
[5332] IP:192.168.2.103
[5332] bg:ECon.TryB
[5332] 
    ___  __          __
   / _ )/ /_ _____  / /__
  / _  / / // / _ \/  '_/
 /____/_/\_, /_//_/_/\_\
        /___/ v0.6.1 on ESP32

[5343] BlynkArduinoClient.connect: Connecting to account.duckdns.org:8080
[6454] Ready (ping: 37ms).
[6522] Connected to Blynk Server = account.duckdns.org, Token = token
[6522] bg:EBCon
Conn2Blynk: server = account.duckdns.org, port = 8080
Token = token, IP = 192.168.2.103
BBBBBBBBBB BBBBBBBBBB BBBBBBBBBB

Releases

Release v1.0.13

  1. Add support to PROGMEM-related commands, such as sendContent_P() and send_P()
  2. Update Platform.ini to support PlatformIO 5.x owner-based dependency declaration.
  3. Clean up code.
  4. Update examples.

New in v1.0.12

  1. Add support to new EthernetENC library for ENC28J60.
  2. Add debug feature. Clean up code.

New in v1.0.11

  1. Add support to Seeeduino SAMD21/SAMD51 boards (LoRaWAN, Zero, Femto M0, XIAO M0, Wio GPS Board, etc.)
  2. Add and restructure examples.

New in v1.0.10

  1. Fix bug not closing client and releasing socket.
  2. Merge new features from latest ESP8266WebServer
  3. Add and enhance examples.

New in v1.0.9

  1. Add EthernetWrapper.h for easier W5x00 support as well as more Ethernet libs in the future.
  2. Add default SS/CS pin for ESP8266 and ESP32
  3. Increase default clock speed for W5x00 in Ethernet, and EthernetLarge libraries to 25MHz from 14MHz. Tested OK on W5100 as well as W5500.

New in v1.0.8

  1. Fix W5x00 support for ESP8266 and many more boards.

New in v1.0.7

  1. Add ENC28J60 support to ESP32 and ESP8266 boards.

New in v1.0.6

  1. Add W5x00 nsupport to ESP32 and ESP8266 boards.

New in v1.0.5

  1. Add support to nRF52 boards, such as AdaFruit Feather nRF52832, nRF52840 Express, BlueFruit Sense, Itsy-Bitsy nRF52840 Express, Metro nRF52840 Express, NINA_B302_ublox, etc.
  2. Support any future custom Ethernet library that meets the no-compiling-error requirements. Currently Ethernet, EthernetLarge, Ethernet2 and Ethernet3 libraries are supported. Ethernet_Shield_W5200, EtherCard, EtherSia libraries are not supported now.

New in v1.0.4

  1. Add support to SAM51 (Itsy-Bitsy M4, Metro M4, Grand Central M4, Feather M4 Express, etc.).

Version v1.0.3

  1. From v1.0.3+, the library supports many more Arduino boards ( SAM DUE, SAMD: ZERO, MKR, NANO_33_IOT, M0, M0 Pro, AdaFruit CIRCUITPLAYGROUND_EXPRESS, etc.)

Version v1.0.2

  1. From v1.0.2+, the library supports many more Arduino boards (Atmel AVR-s, Atmel SAM3X8E ARM Cortex-M3, STM32F series, ESP8266, Intel ARC32(Genuino101), Nordic nRF51(RFduino), Teensy boards, Realtek Ameba(RTL8195A,RTL8710))
  2. Support Wiznet W5x00 or ENC28J60 EThernet shields by using UIPEthernet library besides standard Ethernet, Ethernet2, Ethernet3 libraries.

Version v1.0.1

  1. Add support to Server's lambda function calls

Version v1.0.0

This is simple yet complete WebServer library for AVR, Teensy, etc. boards running Ethernet shields. The functions are similar and compatible to ESP8266/ESP32 WebServer libraries to make life much easier to port sketches from ESP8266/ESP32.

Supporting Boards

This EthernetWebServer library currently supports these following boards:

  1. nRF52 boards, such as AdaFruit Feather nRF52832, nRF52840 Express, BlueFruit Sense, Itsy-Bitsy nRF52840 Express, Metro nRF52840 Express, NINA_B302_ublox, NINA_B112_ublox, etc.
  2. SAM DUE
  3. SAMD21
  • Arduino SAMD21: ZERO, MKRs, NANO_33_IOT, etc.
  • Adafruit SAMD21 (M0): ItsyBitsy M0, Feather M0, Feather M0 Express, Metro M0 Express, Circuit Playground Express, Trinket M0, PIRkey, Hallowing M0, Crickit M0, etc.
  • Seeeduino: LoRaWAN, Zero, Femto M0, XIAO M0, Wio GPS Board, etc.
  1. SAMD51
  • Adafruit SAMD51 (M4): Metro M4, Grand Central M4, ItsyBitsy M4, Feather M4 Express, Trellis M4, Metro M4 AirLift Lite, MONSTER M4SK Express, Hallowing M4, etc.
  • Seeeduino: Wio Terminal, Grove UI Wireless
  1. Teensy (4.1, 4.0, 3.6, 3.5, 3,2, 3.1, 3.0, LC)
  2. AVR Mega1280, 2560, ADK.
  3. ESP32
  4. ESP8266

Supporting Ethernet shields/modules:

  1. W5x00 using Ethernet, EthernetLarge, Ethernet2 or Ethernet3 library
  2. ENC28J60 using EthernetENC or UIPEthernet library

The library provides these features:

  1. TCP Server and Client
  2. UDP Server and Client
  3. HTTP Server and Client
  4. HTTP GET and POST requests, provides argument parsing, handles one client at a time.

Issues

Submit issues to: EthernetWebServer issues

TO DO

  1. Bug Searching and Killing
  2. Add SSL/TLS Client and Server support
  3. Support more types of boards using Ethernet shields.
  4. Support more non-compatible Ethernet Libraries such as Ethernet_Shield_W5200, EtherCard, EtherSia
  5. Add mDNS features.

DONE

  1. Add support to Arduino SAMD21 (ZERO, MKR, NANO_33_IOT, etc.)
  2. Add support to Adafruit SAMD21 (Itsy-Bitsy M0, Metro M0, Feather M0 Express, etc.).
  3. Add support to Adafruit SAMD51 (Itsy-Bitsy M4, Metro M4, Grand Central M4, Feather M4 Express, etc.).
  4. Add support to Adafruit nRF52 ( Feather nRF52832, nRF52840 Express, BlueFruit Sense, Itsy-Bitsy nRF52840 Express, Metro nRF52840 Express, NINA_B302_ublox, NINA_B112_ublox, etc..
  5. Add support to SAM DUE.
  6. Add support to Ethernet W5x00, using either Ethernet, Ethernet2, Ethernet3 or EthernetLarge library
  7. Add support to Ethernet ENC28J60, using UIPEthernet library
  8. Add support to ESP32 and ESP8266
  9. Add support to Seeeduino SAMD21/SAMD51: LoRaWAN, Zero, Femto M0, XIAO M0, Wio GPS Board, Wio Terminal, Grove UI Wireless
  10. Add support to EthernetENC
  11. Add support to PROGMEM-related commands, such as sendContent_P() and send_P()

Contributions and Thanks

Many thanks for everyone for bug reporting, new feature suggesting, testing and contributing to the development of this library.

  1. Based on and modified from the good Ivan Grokhotkov's ESP8266WebServer and ESP32 WebServer libraries.
  2. jandrassy for EthernetENC and UIPEthernet library
  3. Thanks to good work of Miguel Alexandre Wisintainer for initiating, inspriring, working with, developing, debugging and testing. Without that, support to nRF52, especially U-Blox B302 running as nRF52840 and U-Blox B112 running as nRF52832, has never been started and finished. Also see ESP32-based U-BLOX NINA W102 running ENC28J60.
  4. Thanks to Vladimir to initiate the work on ESP32 and ESP8266 in Spiffs not work Issue #2
igrr
⭐️ Ivan Grokhotkov
 jandrassy
⭐️ Juraj Andrássy
 tcpipchip
⭐️ Miguel Wisintainer
 Vladimir
Vladimir

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 MIT

Copyright

Copyright 2020- Khoi Hoang

About

This is simple yet complete WebServer library for AVR, Teensy, SAM DUE, SAMD21/SAMD51, nRF52, STM32, etc. boards running Ethernet shields. The functions are similar and compatible to ESP8266/ESP32 WebServer libraries to make life much easier to port sketches from ESP8266/ESP32.

Resources

Readme

License

MIT license
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