my wifi car controller accept one command plz i need solutions

hello guys

i need your help my defense on 19 of May and my robot car has problem

i made car robot using arduino and l298n moving via web page arrows using cc3000 wifi breakout board

those are my codes but unfortunately its accept one command only when i press forward its accept it but its id not accept any command after that so its keeps go forward

some people told me the problem with power so i gave thr car about 30v but doesnt work also

do i have to use aRest library? is it will fix that problem or do u have any other solution

the codes

#include <Adafruit_CC3000.h>
#include <ccspi.h>
#include <SPI.h>
#include <string.h>
#include "utility/debug.h"
#include "utility/socket.h"
#include <stdlib.h>

const int IN1=4;
const int IN2=2;
const int IN3=7;
const int IN4=8;
/*const int INA= A0;
const int INB= A1;
const int INC= A2;
const int IND= A3;*/

  char input;

// These are the interrupt and control pins
#define ADAFRUIT_CC3000_IRQ   3  // MUST be an interrupt pin!
// These can be any two pins
#define ADAFRUIT_CC3000_VBAT  5
#define ADAFRUIT_CC3000_CS    10
// Use hardware SPI for the remaining pins
// On an UNO, SCK = 13, MISO = 12, and MOSI = 11

Adafruit_CC3000 cc3000 = Adafruit_CC3000(ADAFRUIT_CC3000_CS, ADAFRUIT_CC3000_IRQ, ADAFRUIT_CC3000_VBAT,
                                         SPI_CLOCK_DIV2); // you can change this clock speed

#define WLAN_SSID       "aa"   // cannot be longer than 32 characters!
#define WLAN_PASS       "11"
// Security can be WLAN_SEC_UNSEC, WLAN_SEC_WEP, WLAN_SEC_WPA or WLAN_SEC_WPA2
#define WLAN_SECURITY   WLAN_SEC_WPA2

#define LISTEN_PORT           80      // What TCP port to listen on for connections.  
                                      // The HTTP protocol uses port 80 by default.
                                      
Adafruit_CC3000_Server httpServer(LISTEN_PORT);

String readString;

void setup()
{
   
pinMode( IN1 ,OUTPUT);// Right Motor 1st wire
pinMode( IN2 ,OUTPUT);// Right Motor 2nd wire
pinMode( IN3 ,OUTPUT);// left Motor 1st wire
pinMode( IN4 ,OUTPUT);// left Motor 2nd wire

Serial.begin(115200);

// analogWrite(E1, 0);
  Serial.println(F("Hello, CC3000!\n")); 

  Serial.print("Free RAM: "); Serial.println(getFreeRam(), DEC);
  
   
  // Initialise the module
  Serial.println(F("\nInitializing..."));
  if (!cc3000.begin())
  {
    Serial.println(F("Couldn't begin()! Check your wiring?"));
    while(1);
  }
  
  Serial.print(F("\nAttempting to connect to ")); Serial.println(WLAN_SSID);
  if (!cc3000.connectToAP(WLAN_SSID, WLAN_PASS, WLAN_SECURITY)) {
    Serial.println(F("Failed!"));
    while(1);
  }
   
  Serial.println(F("Connected!"));
  
  Serial.println(F("Request DHCP"));
  while (!cc3000.checkDHCP())
  {
    delay(100); // ToDo: Insert a DHCP timeout!
  }  

  // Display the IP address DNS, Gateway, etc.
  while (! displayConnectionDetails()) {
    delay(1000);
  }
  // Start listening for connections
  httpServer.begin();
  
  Serial.println(F("Listening for connections..."));

}

void loop() {
  
    // Try to get a client which is connected.
  Adafruit_CC3000_ClientRef client = httpServer.available();
  
   if (client) 
  {
    delay(5);
    Serial.println(F("Client connected."));
    // Process this request until it completes or times out.
    // Note that this is explicitly limited to handling one request at a time!

    // An HTTP request ends with a blank line
        boolean currentLineIsBlank = true;
        
        
        while (client.connected()) 
        {
          
            if (client.available())
            {
                char c = client.read();
                //Serial.write(c);
                // If you've gotten to the end of the line (received a newline
                // character) and the line is blank, the HTTP request has ended,
                // so you can send a reply.
                if (readString.length() < 100) {
                    readString += c;
                    Serial.print(c);
                }
                
                if (c == '\n' && currentLineIsBlank) {
                  
                  client.println("HTTP/1.1 200 OK");
                    client.println("Content-Type: text/html");
                    client.println();
                    client.println("<!DOCTYPE HTML>"); 
                    
                    //send the HTML stuff
                    client.println("<html><head><title>Randi Control Panel</title><style type=\"text/css\">");
                    client.println("body { font-family: sans-serif }");
                  /*
                    client.println("h1 { font-size: 14pt; }");
                    client.println("p  { font-size: 10pt; }");
                    client.println("a  { color: #2020FF; }");
                    client.println("</style>");
                    client.println("</head><body text=\"#A0A0A0\" bgcolor=\"#080808\">");
                 */ 
                    client.println("<h1>Randi Controls</h1>
");
                  
                    client.println(F("<form method=\"link\" action=\"/forward\"><input type=\"submit\" value=\"Go!\"></form>"));
                    client.println(F("<form method=\"link\" action=\"/backward\"><input type=\"submit\" value=\"Reverse!\"></form>"));
                   client.println(F("<form method=\"link\" action=\"/stop\"><input type=\"submit\" value=\"Stop\"></form>"));
                  
                    client.println(F("<form method=\"link\" action=\"/left\"><input type=\"submit\" value=\"Front Left\"></form>"));
                    client.println(F("<form method=\"link\" action=\"/right\"><input type=\"submit\" value=\"Front Right\"></form>"));
//client.println("<form method=\"link\" action=\"/Bleft\"><input type=\"submit\" value=\"Back Left\"></form>");
                   // client.println("<form method=\"link\" action=\"/Bright\"><input type=\"submit\" value=\"Back Right\"></form>");
                    client.println("
");
                    client.println("</body></html>"); 
                    client.println();
                    break; 
                }
                
                if (c == '\n') {
                  // You're starting a new line.
                  currentLineIsBlank = true;
                }
                else if (c != '\r') {
                  // You've gotten a character on the current line.
                  currentLineIsBlank = false;
                }
                 
            }
        }
        // Give the web browser time to receive the data.
          
         process(client);
        
          readString = "";
client.close();
}
 
        
  }  
        
 void process (Adafruit_CC3000_ClientRef client)
{       
   if(readString.length() > 0){
    if (readString.indexOf("/forward") > 0)
      {
  // put your main code here, to run repeatedly:
/*if (Serial.available()) {
    // read the most recent character
    */
 //  input = Serial.read();
    // switch based on the character
  //  switch(input){
    //  case 'F': 
        // forward
  analogWrite(IN1,0);
  analogWrite(IN2,255);
  analogWrite(IN3,255);
  analogWrite(IN4,0);
   //break;
  }
  else if (readString.indexOf("/backward") > 0)
      {
   //   case 'B':  // backwards
           // v=Serial.read();
   analogWrite(IN1,200);
  analogWrite(IN2,0);
  analogWrite(IN3,0);
  analogWrite(IN4,200);
  // break;
      }
   //   case 'S':  // stop
   
    else if (readString.indexOf("/stop") > 0)
      {
        analogWrite(IN1,0);
        analogWrite(IN2,0);
        analogWrite(IN3,0);
        analogWrite(IN4,0);
     //   break;
      }
     // case 'L':  // left
      else if (readString.indexOf("/left") > 0)
      {   
  analogWrite(IN1,0);
  analogWrite(IN2,150);
  analogWrite(IN3,0);
  analogWrite(IN4,200);
      }
      //  break;
    //  case 'R':  // right
   else if (readString.indexOf("/right") > 0)
      { 
  analogWrite(IN1,150);
  analogWrite(IN2,LOW);
  analogWrite(IN3,200);
  analogWrite(IN4,LOW);
      }//  break;
   //   default:    // if character not recognized then stop
      else if (readString.indexOf("/stop") > 0)
      {
        analogWrite(IN1, 0);
        analogWrite(IN3, 0);
    //    break;
    }
}}


// Tries to read the IP address and other connection details
bool displayConnectionDetails(void)
{
  uint32_t ipAddress, netmask, gateway, dhcpserv, dnsserv;
  
  if(!cc3000.getIPAddress(&ipAddress, &netmask, &gateway, &dhcpserv, &dnsserv))
  {
    Serial.println(F("Unable to retrieve the IP Address!\r\n"));
    return false;
  }
  else
  {
    Serial.print(F("\nIP Addr: ")); cc3000.printIPdotsRev(ipAddress);
    Serial.print(F("\nNetmask: ")); cc3000.printIPdotsRev(netmask);
    Serial.print(F("\nGateway: ")); cc3000.printIPdotsRev(gateway);
    Serial.print(F("\nDHCPsrv: ")); cc3000.printIPdotsRev(dhcpserv);
    Serial.print(F("\nDNSserv: ")); cc3000.printIPdotsRev(dnsserv);
    Serial.println();
    return true;
  }
}

Looks like

//   default:    // if character not recognized then stop
      else if (readString.indexOf("/stop") > 0)
      {
        analogWrite(IN1, 0);
        analogWrite(IN3, 0);
    //    break;
    }

should be

   //   default:    // if character not recognized then stop
      else
      {
        analogWrite(IN1, 0);
        analogWrite(IN3, 0);
    }

i have changed but nothing happen :(