ESP8266_Get_Arguments_from_Client_for_Mulitple_Inputs.ino

/* ESP8266 Webserver obtaining arguments from a connected client
 The 'MIT License (MIT) Copyright (c) 2016 by David Bird'. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, 
 distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the
 following conditions: 
   The above copyright ('as annotated') notice and this permission notice shall be included in all copies or substantial portions of the Software and where the
   software use is visible to an end-user.
   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHOR OR COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF, OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
See more at http://dsbird.org.uk
*/

#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <DNSServer.h>
#include <WiFiManager.h>     // https://github.com/tzapu/WiFiManager

WiFiClient client;
ESP8266WebServer server(80); // Start server on port 80 (default for a web-browser, change to your requirements, e.g. 8080 if your Router uses port 80
                             // To access server from the outsid of a WiFi network e.g. ESP8266WebServer server(8266); and then add a rule on your Router that forwards a
                             // connection request to http://your_network_ip_address:8266 to port 8266 and view your ESP server from anywhere.
                             // Example http://g6ejd.uk.to:8266 will be directed to http://192.168.0.40:8266 or whatever IP address your router gives to this server

String Argument_Name, Clients_Response1, Clients_Response2;

void setup() {
  Serial.begin(115200);
  //WiFiManager intialisation. Once completed there is no need to repeat the process on the current board
  WiFiManager wifiManager;
  // New OOB ESP8266 has no Wi-Fi credentials so will connect and not need the next command to be uncommented and compiled in, a used one with incorrect credentials will
  // so restart the ESP8266 and connect your PC to the wireless access point called 'ESP8266_AP' or whatever you call it below in ""
  // wifiManager.resetSettings(); // Command to be included if needed, then connect to http://192.168.4.1/ and follow instructions to make the WiFi connection
  // Set a timeout until configuration is turned off, useful to retry or go to sleep in n-seconds
  wifiManager.setTimeout(180);
  //fetches ssid and password and tries to connect, if connections succeeds it starts an access point with the name called "ESP8266_AP" and waits in a blocking loop for configuration
  if(!wifiManager.autoConnect("ESP8266_AP")) {
    Serial.println("failed to connect and timeout occurred");
    delay(3000);
    ESP.reset(); //reset and try again
    delay(5000);
  }
  // At this stage the WiFi manager will have successfully connected to a network, or if not will try again in 180-seconds
  //----------------------------------------------------------------------------------------------------------------------
  Serial.println("WiFi connected..");
  server.begin(); Serial.println("Webserver started..."); // Start the webserver
  Serial.print("Use this URL to connect: http://");// Print the IP address
  Serial.print(WiFi.localIP());Serial.println("/");
  // NOTE: You must use the IP address assigned to YOUR Board when printed/displayed here on your serial port
  // that's the address you must use, not the one I used !
  
  // Next define what the server should do when a client connects
  server.on("/", HandleClient); // The client connected with no arguments e.g. http:192.160.0.40/
  server.on("/result", ShowClientResponse);
}

void HandleClient() {
  String webpage;
  webpage =  "<html>";
   webpage += "<head><title>ESP8266 Input Example</title>";
    webpage += "<style>";
     webpage += "body { background-color: #E6E6FA; font-family: Arial, Helvetica, Sans-Serif; Color: blue;}";
    webpage += "</style>";
   webpage += "</head>";
   webpage += "<body>";
    webpage += "<h1><br>ESP8266 Server - Getting input from a client</h1>";  
    String IPaddress = WiFi.localIP().toString();
    webpage += "<form action='http://"+IPaddress+"' method='POST'>";
     webpage += "&nbsp;&nbsp;&nbsp;&nbsp;Please enter your Name:<input type='text' name='name_input'><BR>";
     webpage += "Please enter your Address:<input type='text' name='address_input'>&nbsp;<input type='submit' value='Enter'>"; // omit <input type='submit' value='Enter'> for just 'enter'
    webpage += "</form>";
   webpage += "</body>";
  webpage += "</html>";
  server.send(200, "text/html", webpage); // Send a response to the client asking for input
  if (server.args() > 0 ) { // Arguments were received
    for ( uint8_t i = 0; i < server.args(); i++ ) {
      Serial.print(server.argName(i)); // Display the argument
      Argument_Name = server.argName(i);
      if (server.argName(i) == "name_input") {
        Serial.print(" Input received was: ");
        Serial.println(server.arg(i));
        Clients_Response1 = server.arg(i);
        // e.g. range_maximum = server.arg(i).toInt();   // use string.toInt()   if you wanted to convert the input to an integer number
        // e.g. range_maximum = server.arg(i).toFloat(); // use string.toFloat() if you wanted to convert the input to a floating point number
      }
      if (server.argName(i) == "address_input") {
        Serial.print(" Input received was: ");
        Serial.println(server.arg(i));
        Clients_Response2 = server.arg(i);
        // e.g. range_maximum = server.arg(i).toInt();   // use string.toInt()   if you wanted to convert the input to an integer number
        // e.g. range_maximum = server.arg(i).toFloat(); // use string.toFloat() if you wanted to convert the input to a floating point number
      }
    }
  }
}

void ShowClientResponse() {
  String webpage;
  webpage =  "<html>";
   webpage += "<head><title>ESP8266 Input Example</title>";
    webpage += "<style>";
     webpage += "body { background-color: #E6E6FA; font-family: Arial, Helvetica, Sans-Serif; Color: blue;}";
    webpage += "</style>";
   webpage += "</head>";
   webpage += "<body>";
    webpage += "<h1><br>ESP8266 Server - This was what the client sent</h1>";
    webpage += "<p>Name received was: " + Clients_Response1 + "</p>";
    webpage += "<p>Address received was: " + Clients_Response2 + "</p>";
   webpage += "</body>";
  webpage += "</html>";
  server.send(200, "text/html", webpage); // Send a response to the client asking for input
}

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