ESP01_SpeechRecognition.ino

/* 
ESP01 (Open in Chrome)
Author : ChungYi Fu (Kaohsiung, Taiwan)  2019-08-24 11:00
https://www.facebook.com/francefu

Command Format :  
http://APIP/?cmd=str1;str2;str3;str4;str5;str6;str7;str8;str9
http://STAIP/?cmd=str1;str2;str3;str4;str5;str6;str7;str8;str9

Default APIP： 192.168.4.1
STAIP：
Query：http://192.168.4.1/?ip
Link：http://192.168.4.1/?resetwifi=ssid;password

http://STAIP/?ip
http://STAIP/?mac
http://STAIP/?restart
http://STAIP/?resetwifi=ssid;password
http://STAIP/?speech=text;language;checkbox
*/

#include <ESP8266WiFi.h>

// Enter your WiFi ssid and password
const char* ssid     = "xxxxx";   //your network SSID
const char* password = "xxxxx";   //your network password
const String page = "https://fustyles.github.io/webduino/ESP32_SpeechRecognition.html";

const char* apssid = "ESP01 Speech";
const char* appassword = "12345678";         //AP password require at least 8 characters.

WiFiServer server(80);

String Feedback="", Command="",cmd="",str1="",str2="",str3="",str4="",str5="",str6="",str7="",str8="",str9="";
byte ReceiveState=0,cmdState=1,strState=1,questionstate=0,equalstate=0,semicolonstate=0;

void ExecuteCommand()
{
  str1 = urldecode(str1);
  
  Serial.println("");
  //Serial.println("Command: "+Command);
  Serial.println("cmd= "+cmd+" ,str1= "+str1+" ,str2= "+str2+" ,str3= "+str3+" ,str4= "+str4+" ,str5= "+str5+" ,str6= "+str6+" ,str7= "+str7+" ,str8= "+str8+" ,str9= "+str9);
  Serial.println("");
  
  if (cmd=="your cmd") {
    // You can do anything
    // Feedback="<font color=\"red\">Hello World</font>";
  }
  else if (cmd=="speech") {
    if (str1.indexOf("on")!=-1||str1.indexOf("開")!=-1) {    //Turn on the LED
      ledcDetachPin(2);
      pinMode(2, OUTPUT);
      digitalWrite(2, 1);
      Feedback="<font color=\"red\">Turn on the LED</font>";
    }
    else if (str1.indexOf("off")!=-1||str1.indexOf("關")!=-1) {    //Turn off the LED
      ledcDetachPin(2);
      pinMode(2, OUTPUT);
      digitalWrite(2, 0);
      Feedback="<font color=\"red\">Turn off the LED</font>";
    }
    else
      Feedback="<font color=\"red\">No defined => "+str1+"</font>";
  } 
  else if (cmd=="ip") {
    Feedback="AP IP: "+WiFi.softAPIP().toString();    
    Feedback+=", ";
    Feedback+="STA IP: "+WiFi.localIP().toString();
  }  
  else if (cmd=="mac") {
    Feedback="STA MAC: "+WiFi.macAddress();
  }  
  else if (cmd=="restart") {
    setup();
    Feedback=Command;
  }    
  else if (cmd=="resetwifi") {
    WiFi.begin(str1.c_str(), str2.c_str());
    Serial.print("Connecting to ");
    Serial.println(str1);
    long int StartTime=millis();
    while (WiFi.status() != WL_CONNECTED) 
    {
        delay(500);
        if ((StartTime+5000) < millis()) break;
    } 
    Serial.println("");
    Serial.println("STAIP: "+WiFi.localIP().toString());
    Feedback="STAIP: "+WiFi.localIP().toString();
  }
  else {
    Feedback="Command is not defined";
  }
}

void setup()
{
  Serial.begin(115200);
  delay(10);
  
  WiFi.mode(WIFI_AP_STA);

  //WiFi.config(IPAddress(192, 168, 201, 100), IPAddress(192, 168, 201, 2), IPAddress(255, 255, 255, 0));

  WiFi.begin(ssid, password);

  delay(1000);
  Serial.println("");
  Serial.print("Connecting to ");
  Serial.println(ssid);
  
  long int StartTime=millis();
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    if ((StartTime+10000) < millis()) break;
  }  

  Serial.println("");
  Serial.println("STAIP address: ");
  Serial.println(WiFi.localIP());

  if (WiFi.status() == WL_CONNECTED)
    WiFi.softAP((WiFi.localIP().toString()+"_"+(String)apssid).c_str(), appassword);
  else
    WiFi.softAP(apssid, appassword);
    
  //WiFi.softAPConfig(IPAddress(192, 168, 4, 1), IPAddress(192, 168, 4, 1), IPAddress(255, 255, 255, 0)); 
  Serial.println("");
  Serial.println("APIP address: ");
  Serial.println(WiFi.softAPIP());    
  server.begin(); 

  if (WiFi.status() == WL_CONNECTED) {
    pinMode(2, OUTPUT);
    for (int i=0;i<5;i++) {
      digitalWrite(2,HIGH);
      delay(100);
      digitalWrite(2,LOW);
      delay(100);
    }
  } 
  else {
    pinMode(2, OUTPUT);
    for (int i=0;i<3;i++) {
      digitalWrite(2,HIGH);
      delay(500);
      digitalWrite(2,LOW);
      delay(500);
    }
  }
}

void loop()
{
  Command="";cmd="";str1="";str2="";str3="";str4="";str5="";str6="";str7="";str8="";str9="";
  ReceiveState=0,cmdState=1,strState=1,questionstate=0,equalstate=0,semicolonstate=0;

  WiFiClient client = server.available();

  if (client) { 
    String currentLine = "";

    while (client.connected()) {
      if (client.available()) {
        char c = client.read();             
        
        getCommand(c);
                
        if (c == '\n') {
          if (currentLine.length() == 0) {          
            /*
            client.println("HTTP/1.1 200 OK");
            client.println("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");
            client.println("Access-Control-Allow-Methods: GET,POST,PUT,DELETE,OPTIONS");
            client.println("Content-Type: application/json;charset=utf-8");
            client.println("Access-Control-Allow-Origin: *");
            client.println("Connection: close");
            client.println();
            client.println("[{\"esp8266\":\""+Feedback+"\"}]");
            client.println();
            */
            
            /*
            client.println("HTTP/1.1 200 OK");
            client.println("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");
            client.println("Access-Control-Allow-Methods: GET,POST,PUT,DELETE,OPTIONS");
            client.println("Content-Type: text/xml; charset=utf-8");
            client.println("Access-Control-Allow-Origin: *");
            client.println("Connection: close");
            client.println();
            client.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
            client.println("<esp8266><feedback>"+Feedback+"</feedback></esp8266>");
            client.println();
           */

            if (str2=="") str2="en-US";
            if (Feedback=="") {
              Feedback="Redirect..."; 
              Feedback+="<script>setTimeout(() => location.href = \""+page+"?"+WiFi.localIP().toString()+"&"+str2+"&"+str3+"\", 1000);</script>";
            }
            else {
              Feedback+="<script>setTimeout(() => location.href = \""+page+"?"+WiFi.localIP().toString()+"&"+str2+"&"+str3+"\", 3000);</script>";
            }
            client.println("HTTP/1.1 200 OK");
            client.println("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");
            client.println("Access-Control-Allow-Methods: GET,POST,PUT,DELETE,OPTIONS");
            client.println("Content-Type: text/html; charset=utf-8");
            client.println("Access-Control-Allow-Origin: *");
            client.println("Connection: close");
            client.println();
            client.println("<!DOCTYPE HTML>");
            client.println("<html><head>");
            client.println("<meta charset=\"UTF-8\">");
            client.println("<meta http-equiv=\"Access-Control-Allow-Origin\" content=\"*\">");
            client.println("<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">");
            client.println("</head><body>");
            client.println(Feedback);
            client.println("</body></html>");
            client.println();
                        
            Feedback="";
            break;
          } else {
            currentLine = "";
          }
        } 
        else if (c != '\r') {
          currentLine += c;
        }

        if ((currentLine.indexOf("/?")!=-1)&&(currentLine.indexOf(" HTTP")!=-1)) {
          currentLine="";
          Feedback="";
          ExecuteCommand();
        }
      }
    }
    delay(1);
    client.stop();
  }
}

void getCommand(char c)
{
  if (c=='?') ReceiveState=1;
  if ((c==' ')||(c=='\r')||(c=='\n')) ReceiveState=0;
  
  if (ReceiveState==1)
  {
    Command=Command+String(c);
    
    if (c=='=') cmdState=0;
    if (c==';') strState++;
  
    if ((cmdState==1)&&((c!='?')||(questionstate==1))) cmd=cmd+String(c);
    if ((cmdState==0)&&(strState==1)&&((c!='=')||(equalstate==1))) str1=str1+String(c);
    if ((cmdState==0)&&(strState==2)&&(c!=';')) str2=str2+String(c);
    if ((cmdState==0)&&(strState==3)&&(c!=';')) str3=str3+String(c);
    if ((cmdState==0)&&(strState==4)&&(c!=';')) str4=str4+String(c);
    if ((cmdState==0)&&(strState==5)&&(c!=';')) str5=str5+String(c);
    if ((cmdState==0)&&(strState==6)&&(c!=';')) str6=str6+String(c);
    if ((cmdState==0)&&(strState==7)&&(c!=';')) str7=str7+String(c);
    if ((cmdState==0)&&(strState==8)&&(c!=';')) str8=str8+String(c);
    if ((cmdState==0)&&(strState>=9)&&((c!=';')||(semicolonstate==1))) str9=str9+String(c);
    
    if (c=='?') questionstate=1;
    if (c=='=') equalstate=1;
    if ((strState>=9)&&(c==';')) semicolonstate=1;
  }
}

//https://github.com/zenmanenergy/ESP8266-Arduino-Examples/blob/master/helloWorld_urlencoded/urlencode.ino
String urldecode(String str)
{
    String encodedString="";
    char c;
    char code0;
    char code1;
    for (int i =0; i < str.length(); i++){
        c=str.charAt(i);
      if (c == '+'){
        encodedString+=' ';  
      }else if (c == '%') {
        i++;
        code0=str.charAt(i);
        i++;
        code1=str.charAt(i);
        c = (h2int(code0) << 4) | h2int(code1);
        encodedString+=c;
      } else{
        
        encodedString+=c;  
      }
      
      yield();
    }
    
   return encodedString;
}

unsigned char h2int(char c)
{
    if (c >= '0' && c <='9'){
        return((unsigned char)c - '0');
    }
    if (c >= 'a' && c <='f'){
        return((unsigned char)c - 'a' + 10);
    }
    if (c >= 'A' && c <='F'){
        return((unsigned char)c - 'A' + 10);
    }
    return(0);
}