NodeMCU and Seven Segment control

Development Other Hardware Development
1

I wrote this to control a seven segment using a shift register over network :

#include <ESP8266WiFi.h>

#define ST_CP 16
#define DS 5
#define SH_CP 4
#define SERVER 13

const char* ssid = "";
const char* passwd = "";

int i;

WiFiServer server(80);

byte digits[] = {
  0x3f,
  0x06,
  0x5b,
  0x4f,
  0x66,
  0x6d,
  0x7d,
  0x07,
  0x7f,
  0x6f
};

char reqs[] = {  '/0', '/1', '/2', '/3', '/4', '/5', '/6' , '/7', '/8', '/9'};

void setup() {
  // put your setup code here, to run once:
  pinMode(ST_CP, OUTPUT);
  pinMode(DS, OUTPUT);
  pinMode(SH_CP, OUTPUT);
  pinMode(SERVER, OUTPUT);

  Serial.begin(115200);
  delay(10);
  digitalWrite(SERVER, HIGH);
  WiFi.begin(ssid, passwd); 
  while(WiFi.status() != WL_CONNECTED){
    delay(50);
    Serial.print(".");
  }
  Serial.println(" ");
  Serial.println("Connection Established");

  server.begin();
  Serial.println("Server Started!");
  Serial.println(WiFi.localIP());
  digitalWrite(SERVER, LOW);
  

}

void loop() {
  // put your main code here, to run repeatedly:
 WiFiClient client = server.available();
 if(!client){
  return;
 }

 while(!client.available()){
  delay(1);
 }

 String request = client.readStringUntil('\r');
 Serial.println(request);
 client.flush();

 int value = LOW;

 for(i = 0; i < 10; i++){
  if(request.indexOf(reqs[i]) != -1){
  digitalWrite(ST_CP, LOW);
  shiftOut(DS, SH_CP, MSBFIRST, ~(digits[i]));
  digitalWrite(ST_CP, HIGH);
  value = HIGH;
  } 
 }

 client.println("HTTP/1.1 200 OK");
 client.println("Content-type: text/html");
 client.println("");
 client.println("<!DOCTYPE HTML>");
 client.println("<html>");
 client.println("<head>");
 client.println("<title> Internet Controlled Seven Segment (Shift Register) </title>");
 client.println("</head>");
 client.println("<body>");
 client.println("<h1> IoT Seven Segment </h1>");
 client.println("<p> Just send requests like this :");
 client.println("
<pre>/0</pre>
");
 client.println("</body>");
 

}

And now, I have two problems.

When I send this request :

GET /0

It shows '1' on the seven segment (other numbers are ok)

and when I use my mobile phone to send requests, it shows the digit I requested but jumps to 1 quickly.

How can I solve these two problems?

2

UPDATE :

I commented the "Index Page" section, and this problem :

and when I use my mobile phone to send requests, it shows the digit I requested but jumps to 1 quickly.

Has been solved.

But I still have the first problem.

3 
char reqs[] = {  '/0', '/1', '/2', '/3', '/4', '/5', '/6' , '/7', '/8', '/9'};

This is a strange definition, what are the values for each character?

You do not expect indexOf to find something like "/0", do you?
You are only looking for the low byte of your big constants ("0" etc).