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v1.8.15-0 to permit sending data larger than 4K
### Releases v1.8.15-0 1. Fix severe limitation to permit sending much larger data than total 4K. Check [server.send buffer size limited to 4k #23](khoih-prog/WiFiWebServer#23) 2. Add examples [WiFiWebServer_BigData](https://github.com/khoih-prog/WiFiNINA_Generic/tree/main/examples/WiFiWebServer_BigData) to demo how to send much larger data than total 4K 3. Optimize code 4. Clean up
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‎examples/WiFiWebServer_BigData/WiFiWebServer_BigData.ino

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/****************************************************************************************************************************
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WiFiWebServer_BigData.ino
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A simple web server that shows the value of the analog input pins.
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This example is written for a network using WPA encryption. For
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WEP or WPA, change the Wifi.begin() call accordingly.
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Circuit:
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Analog inputs attached to pins A0 through A5 (optional)
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created 13 July 2010
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by dlf (Metodo2 srl)
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modified 31 May 2012
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by Tom Igoe
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Based on and modified from WiFiNINA library https://www.arduino.cc/en/Reference/WiFiNINA
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to support nRF52, SAMD21/SAMD51, STM32F/L/H/G/WB/MP1, Teensy, etc. boards besides Nano-33 IoT, MKRWIFI1010, MKRVIDOR400, etc.
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Built by Khoi Hoang https://github.com/khoih-prog/WiFiNINA_Generic
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Licensed under MIT license
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Copyright (c) 2018 Arduino SA. All rights reserved.
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Copyright (c) 2011-2014 Arduino LLC. All right reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*****************************************************************************************************************************/
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#include "defines.h"
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#include "arduino_secrets.h"
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// To eliminate FW warning when using not latest nina-fw version
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// To use whenever WiFi101-FirmwareUpdater-Plugin is not sync'ed with nina-fw version
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#define WIFI_FIRMWARE_LATEST_VERSION "1.4.8"
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#include <SPI.h>
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#include <WiFiNINA_Generic.h>
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#include <WiFiWebServer.h>
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///////please enter your sensitive data in the Secret tab/arduino_secrets.h
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char ssid[] = SECRET_SSID; // your network SSID (name)
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char pass[] = SECRET_PASS; // your network password (use for WPA, or use as key for WEP), length must be 8+
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int keyIndex = 0; // your network key Index number (needed only for WEP)
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int status = WL_IDLE_STATUS;
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WiFiWebServer server(80);
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// Adjust according to yout board's heap size. Too large => crash
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// Nano_RO2040_Connect =< can use 3.0f or more
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// Nano_33_IoT => 2.5f
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#if defined(ARDUINO_NANO_RP2040_CONNECT)
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#define MULTIPLY_FACTOR 3.0f
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#elif defined(ARDUINO_SAMD_NANO_33_IOT)
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#define MULTIPLY_FACTOR 2.5f
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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>WiFiWebServer_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>WiFiWebServer_NINA!</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 printWiFiStatus()
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{
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// print the SSID of the network you're attached to:
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Serial.print(F("SSID: "));
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Serial.println(WiFi.SSID());
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// print your board's IP address:
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IPAddress ip = WiFi.localIP();
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Serial.print(F("IP Address: "));
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Serial.println(ip);
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// print the received signal strength:
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long rssi = WiFi.RSSI();
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Serial.print(F("Signal strength (RSSI):"));
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Serial.print(rssi);
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Serial.println(F(" dBm"));
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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 WiFiWebServer_BigData on "));
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Serial.println(BOARD_NAME);
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Serial.println(WIFININA_GENERIC_VERSION);
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Serial.println(WIFI_WEBSERVER_VERSION);
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// check for the WiFi module:
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if (WiFi.status() == WL_NO_MODULE)
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{
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Serial.println(F("Communication with WiFi module failed!"));
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// don't continue
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while (true);
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}
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String fv = WiFi.firmwareVersion();
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if (fv < WIFI_FIRMWARE_LATEST_VERSION)
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{
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Serial.print(F("Your current firmware NINA FW v"));
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Serial.println(fv);
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Serial.print(F("Please upgrade the firmware to NINA FW v"));
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Serial.println(WIFI_FIRMWARE_LATEST_VERSION);
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}
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// attempt to connect to Wifi network:
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while (status != WL_CONNECTED)
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{
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Serial.print(F("Attempting to connect to SSID: "));
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Serial.println(ssid);
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// Connect to WPA/WPA2 network. Change this line if using open or WEP network:
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status = WiFi.begin(ssid, pass);
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// wait 10 seconds for connection:
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//delay(10000);
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}
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// you're connected now, so print out the status:
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printWiFiStatus();
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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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}

‎examples/WiFiWebServer_BigData/arduino_secrets.h

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#define SECRET_SSID "your_ssid"
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#define SECRET_PASS "your_pass"

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