Tag 19: Konfigurationsseite für den NanoESP

/*
  TCP-Server for RGB-Control
  Change SSID and PASSWORD.
  RGB-Led (common cathode) on Pins 3,5,6
*/

#include <NanoESP.h>
#include <NanoESP_HTTP.h>
#include <SoftwareSerial.h>
#include "Websites.h"

//#define SSID "YourSSID"
//#define PASSWORD "YourPassword"

#define LED_WLAN 13

#define RED 3
#define GREEN 5
#define BLUE 6
#define GND 4

#define DEBUG true

NanoESP nanoesp = NanoESP();
NanoESP_HTTP http = NanoESP_HTTP(nanoesp);

void setup() {
  Serial.begin(19200);
  nanoesp.init();

  pinMode(RED, OUTPUT);
  pinMode(GREEN, OUTPUT);
  pinMode(BLUE, OUTPUT);

  pinMode(GND, OUTPUT);
  digitalWrite(GND, LOW);

  //! Only if you want to change the ACCESPOINT configuration
  //nanoesp.configWifi(ACCESSPOINT, "NanoESP", "");

  //! Only if you use a new Network
  // nanoesp.configWifi(DUAL, SSID, PASSWORD);

  //Dual Mode
  nanoesp.configWifiMode(DUAL);
  //delay(1000);

  // Wait till Connected to WiFi
  if (nanoesp.wifiConnected())digitalWrite(LED_WLAN, HIGH); else Serial.println(F("Error WLAN Connect"));

  //Start TCP Server
  if (nanoesp.startTcpServer(80))    Serial.println(F("TCP Server Activ")); else   Serial.println(F("TCP Server Error"));

  //Print IP in Terminal
  Serial.println(nanoesp.getIp());
}

void loop() {
  String method, ressource, parameter;
  int id;

  if (http.recvRequest(id, method, ressource, parameter)) {

    Serial.println("New Request from id :" + String(id) + ", method: " + method +  ", ressource: " + ressource +  " parameter: " + parameter);

    if (ressource == "/") {
      http.sendFromFlash(id, index, sizeof(index));
      nanoesp.closeConnection(id);
    }

    else if (ressource == "/config") {
      http.sendFromFlash(id, config, sizeof(config));
      nanoesp.closeConnection(id);
    }

    else if (ressource == "/setcolor") { //COLOR
      nanoesp.closeConnection(id);
      if (parameter != " ")
      {
        long number = (long) strtol( &parameter[7], NULL, 16); //Convert String to Hex http://stackoverflow.com/questions/23576827/arduino-convert-a-sting-hex-ffffff-into-3-int

        // Split them up into r, g, b values
        int r = number >> 16;
        int g = number >> 8 & 0xFF;
        int b = number & 0xFF;

        analogWrite(RED, r);
        analogWrite(GREEN, g);
        analogWrite(BLUE, b);
      }
    }

    else if (ressource == "/setconfig") {   //new Wifi-Configuration
      nanoesp.closeConnection(id);
      if (parameter != " ")
      { if (wifiConfig(id, GetRidOfurlCharacters(parameter))) {
          Serial.println(nanoesp.getIp());
        }
      }
    }

    else if (ressource == "/eventssid") { //Wifi scanner
      http.sendStreamHeader(id);

      sendStreamData(id, "msg", "Scanning...");
      ssidTransmit(id);               //Scan for WiFi Networks in range and transmit
      sendStreamData(id, "msg", "Done");
    }

    else {
      http.sendFromFlash(id, error404, sizeof(error404));
      nanoesp.closeConnection(id);
    }

  }
}

bool wifiConfig(int id, String parameter) {  //get new WiFi Configuration
  String ssid, pass, apssid, apass = "";

  while (parameter.length() > 0) {
    String varName = parameter.substring(0, parameter.indexOf('='));
    parameter = parameter.substring(parameter.indexOf('=') + 1);

    if (varName == "ssid") ssid = parameter.substring(0, parameter.indexOf('&'));
    if (varName == "apssid") apssid = parameter.substring(0, parameter.indexOf('&'));
    if (varName == "pass") pass = parameter.substring(0, parameter.indexOf('&'));
    if (varName == "apass") apass = parameter.substring(0, parameter.indexOf('&'));

    parameter = parameter.substring(parameter.indexOf('&') + 1);

  }

  bool success = true;
  digitalWrite(LED_WLAN, LOW);

  if (ssid != "" ) success &= nanoesp.configWifiStation(ssid, pass);  //set new Station config
  if (apssid != "" ) success &= nanoesp.configWifiAP(apssid, apass);  //set new AccessPoint config

  digitalWrite(LED_WLAN, success);
  return success;
}

void ssidTransmit(int id) {  //find and transmit wifis

  nanoesp.println("AT+CWLAP");
  nanoesp.setTimeout(5000);

  int i = 0;
  String ssids[10]; //max 10 ssids

  //get 10 scanned SSIDs
  while ((nanoesp.find("+CWLAP:")) && (i < 10)) {
    nanoesp.find("\"");
    ssids[i] = nanoesp.readStringUntil('\"');
    i++;
  }

  nanoesp.find("OK\r\n");
  
  //transmit ssids to browser (and terminal)
  for (int x = 0; x < i; x++) {
    Serial.println (ssids[x]);
    if (!nanoesp.sendData(id, "event: ssid\ndata: " + ssids[x] + "\n\n")) Serial.println("error wifi event");
  }
  
  nanoesp.setTimeout(1000);
}

boolean sendStreamData(int connectionId, String event, String data) {
  return nanoesp.sendData(connectionId, "event: " + event + "\n" +  "data: " + data + "\n\n");
}

String GetRidOfurlCharacters(String urlChars)  // Convert URL-charakters no normal for ssid
{
  urlChars.replace("%0D%0A", String('\n'));

  urlChars.replace("+",   " ");
  urlChars.replace("%20", " ");
  urlChars.replace("%21", "!");
  urlChars.replace("%22", String(char('\"')));
  urlChars.replace("%23", "#");
  urlChars.replace("%24", "$");
  urlChars.replace("%25", "%");
  urlChars.replace("%26", "&");
  urlChars.replace("%27", String(char(39)));
  urlChars.replace("%28", "(");
  urlChars.replace("%29", ")");
  urlChars.replace("%2A", "*");
  urlChars.replace("%2B", "+");
  urlChars.replace("%2C", ",");
  urlChars.replace("%2D", "-");
  urlChars.replace("%2E", ".");
  urlChars.replace("%2F", "/");
  urlChars.replace("%30", "0");
  urlChars.replace("%31", "1");
  urlChars.replace("%32", "2");
  urlChars.replace("%33", "3");
  urlChars.replace("%34", "4");
  urlChars.replace("%35", "5");
  urlChars.replace("%36", "6");
  urlChars.replace("%37", "7");
  urlChars.replace("%38", "8");
  urlChars.replace("%39", "9");
  urlChars.replace("%3A", ":");
  urlChars.replace("%3B", ";");
  urlChars.replace("%3C", "<");
  urlChars.replace("%3D", "=");
  urlChars.replace("%3E", ">");
  urlChars.replace("%3F", "?");
  urlChars.replace("%40", "@");
  return urlChars;
}