Creates codes, but they are wrong inconsistent

with google authenticator

.gitignore

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+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

.vscode/extensions.json

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+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

include/README

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+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

lib/README

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+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into executable file.
+
+The source code of each library should be placed in a an own separate directory
+("lib/your_library_name/[here are source files]").
+
+For example, see a structure of the following two libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+and a contents of `src/main.c`:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+PlatformIO Library Dependency Finder will find automatically dependent
+libraries scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

platformio.ini

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+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:esp32doit-devkit-v1]
+platform = espressif32
+board = esp32doit-devkit-v1
+framework = arduino
+lib_deps = 
+	adafruit/Adafruit SSD1306@^2.4.0
+	bblanchon/ArduinoJson@^6.19.4
+	lucadentella/TOTP library@^1.1.0
+	arduino-libraries/NTPClient@^3.2.1
+lib_ldf_mode = chain+

src/main.cpp

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+// The codes that are displayed are not consistent with the GOOGLE Authenticator
+// app.... I guess that TOTP library has an issue...
+
+// I connected SCL to D22 and SDA to D21
+
+#include <Adafruit_GFX.h>
+#include <Adafruit_I2CDevice.h>
+#include <Adafruit_SSD1306.h>
+#include <Arduino.h>
+#include <ArduinoJson.h>
+#include <ESPmDNS.h>
+#include <NTPClient.h>
+#include <Update.h>
+#include <WebServer.h>
+#include <WiFi.h>
+#include <WiFiUdp.h>
+#include <Wire.h>
+#include <uri/UriBraces.h>
+
+#include "TOTP.h"
+#include "sha1.h"
+
+WiFiUDP ntpUDP;
+NTPClient timeClient(ntpUDP);
+
+uint8_t hmacKey[] = {0x62, 0x27, 0x2F, 0x33, 0x54, 0x79, 0x4A,
+                     0x69, 0x79, 0x2B, 0x74, 0x66, 0x27};
+
+TOTP totp = TOTP(hmacKey, 12);
+char code[7];
+
+unsigned long lastMsg = 0;
+#define MSG_BUFFER_SIZE (50)
+char msg[MSG_BUFFER_SIZE];
+
+const char* host = "esp32oled";
+const char* ssid = "JoNelsDarlings";
+const char* password = "Paris2016";
+
+WebServer server(80);
+
+// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
+#define SCREEN_WIDTH 128  // OLED display width, in pixels
+#define SCREEN_HEIGHT 64  // OLED display height, in pixels
+
+Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
+
+/*
+ * Login page
+ */
+
+const char* loginIndex =
+    "<form name='loginForm'>"
+    "<table width='20%' bgcolor='A09F9F' align='center'>"
+    "<tr>"
+    "<td colspan=2>"
+    "<center><font size=4><b>ESP32 Login Page</b></font></center>"
+    "<br>"
+    "</td>"
+    "<br>"
+    "<br>"
+    "</tr>"
+    "<td>Username:</td>"
+    "<td><input type='text' size=25 name='userid'><br></td>"
+    "</tr>"
+    "<br>"
+    "<br>"
+    "<tr>"
+    "<td>Password:</td>"
+    "<td><input type='Password' size=25 name='pwd'><br></td>"
+    "<br>"
+    "<br>"
+    "</tr>"
+    "<tr>"
+    "<td><input type='submit' onclick='check(this.form)' value='Login'></td>"
+    "</tr>"
+    "</table>"
+    "</form>"
+    "<script>"
+    "function check(form)"
+    "{"
+    "if(form.userid.value=='admin' && form.pwd.value=='admin')"
+    "{"
+    "window.open('/serverIndex')"
+    "}"
+    "else"
+    "{"
+    " alert('Error Password or Username')/*displays error message*/"
+    "}"
+    "}"
+    "</script>";
+
+/*
+ * Server Index Page
+ */
+
+const char* serverIndex =
+    "<script "
+    "src='https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js'></"
+    "script>"
+    "<form method='POST' action='#' enctype='multipart/form-data' "
+    "id='upload_form'>"
+    "<input type='file' name='update'>"
+    "<input type='submit' value='Update'>"
+    "</form>"
+    "<div id='prg'>progress: 0%</div>"
+    "<script>"
+    "$('form').submit(function(e){"
+    "e.preventDefault();"
+    "var form = $('#upload_form')[0];"
+    "var data = new FormData(form);"
+    " $.ajax({"
+    "url: '/update',"
+    "type: 'POST',"
+    "data: data,"
+    "contentType: false,"
+    "processData:false,"
+    "xhr: function() {"
+    "var xhr = new window.XMLHttpRequest();"
+    "xhr.upload.addEventListener('progress', function(evt) {"
+    "if (evt.lengthComputable) {"
+    "var per = evt.loaded / evt.total;"
+    "$('#prg').html('progress: ' + Math.round(per*100) + '%');"
+    "}"
+    "}, false);"
+    "return xhr;"
+    "},"
+    "success:function(d, s) {"
+    "console.log('success!')"
+    "},"
+    "error: function (a, b, c) {"
+    "}"
+    "});"
+    "});"
+    "</script>";
+
+void writeToOled(String text) {
+  display.clearDisplay();
+  display.setTextColor(WHITE);
+  display.setCursor(0, 0);
+  display.setTextSize(2);
+  display.print(text);
+  display.display();
+}
+
+/*
+ * setup function
+ */
+void setup(void) {
+  Serial.begin(9600);
+  delay(2000);
+
+  Serial.println("STARTUP");
+  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {  // Address 0x3D for 128x64
+    Serial.println(F("SSD1306 allocation failed"));
+    for (;;)
+      ;
+  }
+  delay(2000);
+
+  writeToOled("Startup");
+
+  randomSeed(micros());
+  // Connect to WiFi network
+  WiFi.begin(ssid, password);
+  Serial.println("");
+
+  // Wait for connection or reboot if it doesn't connect for too long
+  uint32_t wifiConnAttements = 0;
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+    if (wifiConnAttements++ > 120) {
+      Serial.println(
+          "<Wifi not connecting after 120 attmepts (1 min.)  - rebooting>");
+      ESP.restart();
+    }
+  }
+
+  Serial.println("");
+  Serial.print("Connected to ");
+  Serial.println(ssid);
+  Serial.print("IP address: ");
+  Serial.println(WiFi.localIP());
+
+  /*use mdns for host name resolution*/
+  if (!MDNS.begin(host)) {  // http://esp32ota.local
+    Serial.println("Error setting up MDNS responder!");
+    while (1) {
+      delay(1000);
+    }
+  }
+  Serial.println("mDNS responder started");
+  /*return index page which is stored in serverIndex */
+  server.on("/", HTTP_GET, []() {
+    server.sendHeader("Connection", "close");
+    server.send(200, "text/html", loginIndex);
+  });
+  server.on("/serverIndex", HTTP_GET, []() {
+    server.sendHeader("Connection", "close");
+    server.send(200, "text/html", serverIndex);
+  });
+  server.on(UriBraces("/oled/{}"), HTTP_GET, []() {
+    server.sendHeader("Connection", "close");
+    String text = server.pathArg(0);
+    writeToOled(text);
+    server.send(200, "text/html", text);
+  });
+  server.on("/oled", HTTP_POST, []() {
+    server.sendHeader("Connection", "close");
+    String text = server.arg(0);
+    writeToOled(text);
+    server.send(200, "text/html", text);
+  });
+  /*handling uploading firmware file */
+  server.on(
+      "/update", HTTP_POST,
+      []() {
+        server.sendHeader("Connection", "close");
+        server.send(200, "text/plain", (Update.hasError()) ? "FAIL" : "OK");
+        ESP.restart();
+      },
+      []() {
+        HTTPUpload& upload = server.upload();
+        if (upload.status == UPLOAD_FILE_START) {
+          Serial.printf("Update: %s\n", upload.filename.c_str());
+          if (!Update.begin(
+                  UPDATE_SIZE_UNKNOWN)) {  // start with max available size
+            Update.printError(Serial);
+          }
+        } else if (upload.status == UPLOAD_FILE_WRITE) {
+          /* flashing firmware to ESP*/
+          if (Update.write(upload.buf, upload.currentSize) !=
+              upload.currentSize) {
+            Update.printError(Serial);
+          }
+        } else if (upload.status == UPLOAD_FILE_END) {
+          if (Update.end(
+                  true)) {  // true to set the size to the current progress
+            Serial.printf("Update Success: %u\nRebooting...\n",
+                          upload.totalSize);
+          } else {
+            Update.printError(Serial);
+          }
+        }
+      });
+  server.begin();
+  timeClient.begin();
+  writeToOled("Ready.");
+}
+
+void loop(void) {
+  timeClient.update();
+  server.handleClient();
+  delay(1000);
+
+  writeToOled(timeClient.getFormattedTime());
+  char* newCode = totp.getCode(timeClient.getEpochTime());
+  if (strcmp(code, newCode) != 0) {
+    strcpy(code, newCode);
+    writeToOled(code);
+    delay(5000);
+  }
+}

test/README

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+
+This directory is intended for PlatformIO Unit Testing and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/page/plus/unit-testing.html