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v2.7.0 to permit sending data more than 2/4/8/16K
### Releases v2.7.0 1. Fix severe limitation to permit sending larger data than 2/4/8/16K buffer 2. Add examples [EthernetWebServer_BigData](https://github.com/khoih-prog/Ethernet_Generic/tree/main/examples/EthernetWebServer_BigData) to demo how to send larger data than 2/4/8/16K buffer 3. Optimize code 4. Clean up 5. Update `Packages' Patches`
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‎examples/EthernetWebServer_BigData/EthernetWebServer_BigData.ino‎

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/****************************************************************************************************************************
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EthernetWebServer_BigData.ino
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EthernetWebServer is a library for the Ethernet shields to run WebServer
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Based on and modified from ESP8266 https://github.com/esp8266/Arduino/releases
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Built by Khoi Hoang https://github.com/khoih-prog/EthernetWebServer
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Licensed under MIT license
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*****************************************************************************************************************************/
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#include "defines.h"
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EthernetWebServer server(80);
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// Adjust according to your board's heap size. Too large => crash
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#if (ESP32 || ESP8266) || (ETHERNET_USE_NRF528XX) || (ETHERNET_USE_RPIPICO)
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#define MULTIPLY_FACTOR 3.0f
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#else
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#define MULTIPLY_FACTOR 1.0f
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#endif
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// In bytes
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#define STRING_SIZE (8192 * MULTIPLY_FACTOR)
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#define BUFFER_SIZE 512
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char temp[BUFFER_SIZE];
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void createPage(String &pageInput)
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{
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int sec = millis() / 1000;
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int min = sec / 60;
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int hr = min / 60;
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int day = hr / 24;
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snprintf(temp, BUFFER_SIZE - 1,
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"<html>\
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<head>\
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<meta http-equiv='refresh' content='5'/>\
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<title>EthernetWebServer_BigData-%s</title>\
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<style>\
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body { background-color: #cccccc; font-family: Arial, Helvetica, Sans-Serif; Color: #000088; }\
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</style>\
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</head>\
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<body>\
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<h2>EthernetWebServer_W5500!</h2>\
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<h3>running on %s</h3>\
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<p>Uptime: %d d %02d:%02d:%02d</p>\
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</body>\
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</html>", BOARD_NAME, BOARD_NAME, day, hr % 24, min % 60, sec % 60);
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pageInput = temp;
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}
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String out;
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void handleRoot()
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{
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//out.reserve(STRING_SIZE);
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// clear the String to start over
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out = String();
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createPage(out);
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out += "<html><body>\r\n<table><tr><th>INDEX</th><th>DATA</th></tr>";
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for (uint16_t lineIndex = 0; lineIndex < (100 * MULTIPLY_FACTOR); lineIndex++)
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{
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out += "<tr><td>";
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out += String(lineIndex);
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out += "</td><td>";
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out += "WiFiWebServer_BigData_ABCDEFGHIJKLMNOPQRSTUVWXYZ</td></tr>";
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}
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out += "</table></body></html>\r\n";
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Serial.print(F("String Len = ")); Serial.println(out.length());
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server.send(200, F("text/html"), out);
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}
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void handleNotFound()
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{
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String message = F("File Not Found\n\n");
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message += F("URI: ");
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message += server.uri();
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message += F("\nMethod: ");
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message += (server.method() == HTTP_GET) ? F("GET") : F("POST");
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message += F("\nArguments: ");
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message += server.args();
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message += F("\n");
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for (uint8_t i = 0; i < server.args(); i++)
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{
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message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
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}
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server.send(404, F("text/plain"), message);
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}
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void initEthernet()
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{
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#if USE_ETHERNET_PORTENTA_H7
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ET_LOGWARN(F("======== USE_PORTENTA_H7_ETHERNET ========"));
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#elif USE_NATIVE_ETHERNET
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ET_LOGWARN(F("======== USE_NATIVE_ETHERNET ========"));
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#elif USE_ETHERNET_GENERIC
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ET_LOGWARN(F("=========== USE_ETHERNET_GENERIC ==========="));
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#elif USE_ETHERNET_ESP8266
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ET_LOGWARN(F("=========== USE_ETHERNET_ESP8266 ==========="));
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#elif USE_ETHERNET_ENC
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ET_LOGWARN(F("=========== USE_ETHERNET_ENC ==========="));
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#else
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ET_LOGWARN(F("========================="));
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#endif
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#if !(USE_NATIVE_ETHERNET || USE_ETHERNET_PORTENTA_H7)
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#if (USING_SPI2)
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#if defined(CUR_PIN_MISO)
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ET_LOGWARN(F("Default SPI pinout:"));
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ET_LOGWARN1(F("MOSI:"), CUR_PIN_MOSI);
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ET_LOGWARN1(F("MISO:"), CUR_PIN_MISO);
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ET_LOGWARN1(F("SCK:"), CUR_PIN_SCK);
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ET_LOGWARN1(F("SS:"), CUR_PIN_SS);
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ET_LOGWARN(F("========================="));
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#endif
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#else
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ET_LOGWARN(F("Default SPI pinout:"));
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ET_LOGWARN1(F("MOSI:"), MOSI);
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ET_LOGWARN1(F("MISO:"), MISO);
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ET_LOGWARN1(F("SCK:"), SCK);
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ET_LOGWARN1(F("SS:"), SS);
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ET_LOGWARN(F("========================="));
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#endif
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#if defined(ESP8266)
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// For ESP8266, change for other boards if necessary
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#ifndef USE_THIS_SS_PIN
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#define USE_THIS_SS_PIN D2 // For ESP8266
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#endif
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ET_LOGWARN1(F("ESP8266 setCsPin:"), USE_THIS_SS_PIN);
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#if ( USE_ETHERNET_GENERIC || USE_ETHERNET_ENC )
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// For ESP8266
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// Pin D0(GPIO16) D1(GPIO5) D2(GPIO4) D3(GPIO0) D4(GPIO2) D8
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// EthernetGeneric X X X X X 0
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// Ethernet_ESP8266 0 0 0 0 0 0
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// D2 is safe to used for Ethernet, Ethernet2, Ethernet3, EthernetLarge libs
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// Must use library patch for Ethernet, EthernetLarge libraries
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Ethernet.init (USE_THIS_SS_PIN);
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#elif USE_CUSTOM_ETHERNET
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// You have to add initialization for your Custom Ethernet here
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// This is just an example to setCSPin to USE_THIS_SS_PIN, and can be not correct and enough
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Ethernet.init(USE_THIS_SS_PIN);
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#endif //( USE_ETHERNET_GENERIC || USE_ETHERNET_ENC )
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#elif defined(ESP32)
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// You can use Ethernet.init(pin) to configure the CS pin
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//Ethernet.init(10); // Most Arduino shields
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//Ethernet.init(5); // MKR ETH shield
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//Ethernet.init(0); // Teensy 2.0
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//Ethernet.init(20); // Teensy++ 2.0
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//Ethernet.init(15); // ESP8266 with Adafruit Featherwing Ethernet
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//Ethernet.init(33); // ESP32 with Adafruit Featherwing Ethernet
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#ifndef USE_THIS_SS_PIN
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#define USE_THIS_SS_PIN 5 //22 // For ESP32
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#endif
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ET_LOGWARN1(F("ESP32 setCsPin:"), USE_THIS_SS_PIN);
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// For other boards, to change if necessary
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#if ( USE_ETHERNET_GENERIC || USE_ETHERNET_ENC )
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// Must use library patch for Ethernet, EthernetLarge libraries
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// ESP32 => GPIO2,4,5,13,15,21,22 OK with Ethernet, Ethernet2, EthernetLarge
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// ESP32 => GPIO2,4,5,15,21,22 OK with Ethernet3
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//Ethernet.setCsPin (USE_THIS_SS_PIN);
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Ethernet.init (USE_THIS_SS_PIN);
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#elif USE_CUSTOM_ETHERNET
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// You have to add initialization for your Custom Ethernet here
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// This is just an example to setCSPin to USE_THIS_SS_PIN, and can be not correct and enough
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Ethernet.init(USE_THIS_SS_PIN);
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#endif //( USE_ETHERNET_GENERIC || USE_ETHERNET_ENC )
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#elif ETHERNET_USE_RPIPICO
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pinMode(USE_THIS_SS_PIN, OUTPUT);
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digitalWrite(USE_THIS_SS_PIN, HIGH);
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// ETHERNET_USE_RPIPICO, use default SS = 5 or 17
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#ifndef USE_THIS_SS_PIN
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#if defined(ARDUINO_ARCH_MBED)
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#define USE_THIS_SS_PIN 5 // For Arduino Mbed core
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#else
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#define USE_THIS_SS_PIN 17 // For E.Philhower core
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#endif
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#endif
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ET_LOGWARN1(F("RPIPICO setCsPin:"), USE_THIS_SS_PIN);
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// For other boards, to change if necessary
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#if ( USE_ETHERNET_GENERIC || USE_ETHERNET_ENC )
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// Must use library patch for Ethernet, EthernetLarge libraries
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// For RPI Pico using Arduino Mbed RP2040 core
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// SCK: GPIO2, MOSI: GPIO3, MISO: GPIO4, SS/CS: GPIO5
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// For RPI Pico using E. Philhower RP2040 core
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// SCK: GPIO18, MOSI: GPIO19, MISO: GPIO16, SS/CS: GPIO17
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// Default pin 5/17 to SS/CS
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//Ethernet.setCsPin (USE_THIS_SS_PIN);
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Ethernet.init (USE_THIS_SS_PIN);
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#endif //( USE_ETHERNET_GENERIC || USE_ETHERNET_ENC )
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#else //defined(ESP8266)
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// unknown board, do nothing, use default SS = 10
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#ifndef USE_THIS_SS_PIN
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#define USE_THIS_SS_PIN 10 // For other boards
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#endif
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#if defined(BOARD_NAME)
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ET_LOGWARN3(F("Board :"), BOARD_NAME, F(", setCsPin:"), USE_THIS_SS_PIN);
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#else
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ET_LOGWARN1(F("Unknown board setCsPin:"), USE_THIS_SS_PIN);
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#endif
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// For other boards, to change if necessary
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#if ( USE_ETHERNET_GENERIC || USE_ETHERNET_ENC || USE_NATIVE_ETHERNET )
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// Must use library patch for Ethernet, Ethernet2, EthernetLarge libraries
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Ethernet.init (USE_THIS_SS_PIN);
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#elif USE_CUSTOM_ETHERNET
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// You have to add initialization for your Custom Ethernet here
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// This is just an example to setCSPin to USE_THIS_SS_PIN, and can be not correct and enough
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Ethernet.init(USE_THIS_SS_PIN);
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#endif //( USE_ETHERNET_GENERIC || USE_ETHERNET_ENC )
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#endif // defined(ESP8266)
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#endif // #if !(USE_NATIVE_ETHERNET)
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// start the ethernet connection and the server:
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// Use DHCP dynamic IP and random mac
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uint16_t index = millis() % NUMBER_OF_MAC;
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// Use Static IP
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//Ethernet.begin(mac[0], ip);
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Ethernet.begin(mac[index]);
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#if !(USE_NATIVE_ETHERNET || USE_ETHERNET_PORTENTA_H7)
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ET_LOGWARN(F("========================="));
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#if ( defined( ESP32 ) && USE_ETHERNET_GENERIC )
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// Just info to know how to connect correctly
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// To change for other SPI
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ET_LOGWARN(F("Currently Used SPI pinout:"));
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ET_LOGWARN1(F("MOSI:"), PIN_MOSI);
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ET_LOGWARN1(F("MISO:"), PIN_MISO);
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ET_LOGWARN1(F("SCK:"), PIN_SCK);
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ET_LOGWARN1(F("SS:"), PIN_SS);
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#else
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#if defined(CUR_PIN_MISO)
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ET_LOGWARN(F("Currently Used SPI pinout:"));
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ET_LOGWARN1(F("MOSI:"), CUR_PIN_MOSI);
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ET_LOGWARN1(F("MISO:"), CUR_PIN_MISO);
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ET_LOGWARN1(F("SCK:"), CUR_PIN_SCK);
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ET_LOGWARN1(F("SS:"), CUR_PIN_SS);
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#else
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ET_LOGWARN(F("Currently Used SPI pinout:"));
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ET_LOGWARN1(F("MOSI:"), MOSI);
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ET_LOGWARN1(F("MISO:"), MISO);
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ET_LOGWARN1(F("SCK:"), SCK);
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ET_LOGWARN1(F("SS:"), SS);
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#endif
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#endif
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ET_LOGWARN(F("========================="));
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#elif (USE_ETHERNET_PORTENTA_H7)
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if (Ethernet.hardwareStatus() == EthernetNoHardware)
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{
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SerialDebug.println("No Ethernet found. Stay here forever");
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while (true)
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{
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delay(1); // do nothing, no point running without Ethernet hardware
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}
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}
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if (Ethernet.linkStatus() == LinkOFF)
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{
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SerialDebug.println("Not connected Ethernet cable");
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}
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#endif
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SerialDebug.print(F("Using mac index = "));
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SerialDebug.println(index);
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SerialDebug.print(F("Connected! IP address: "));
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SerialDebug.println(Ethernet.localIP());
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}
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void setup()
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{
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out.reserve(STRING_SIZE);
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//Initialize serial and wait for port to open:
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Serial.begin(115200);
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while (!Serial && millis() < 5000);
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delay(200);
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Serial.print(F("\nStart EthernetWebServer_BigData on "));
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SerialDebug.print(BOARD_NAME);
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SerialDebug.print(F(" with "));
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SerialDebug.println(SHIELD_TYPE);
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SerialDebug.println(ETHERNET_WEBSERVER_VERSION);
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initEthernet();
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server.on(F("/"), handleRoot);
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server.on(F("/inline"), []()
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{
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server.send(200, F("text/plain"), F("This works as well"));
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});
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server.onNotFound(handleNotFound);
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server.begin();
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}
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void loop()
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{
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server.handleClient();
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}

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