new file: .gitignore

new file:   .vscode/extensions.json
	new file:   include/README
	new file:   lib/README
	new file:   platformio.ini
	new file:   src/main.cpp
	new file:   test/README

.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 convention is to give header files names that end with `.h'.
+
+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 the executable file.
+
+The source code of each library should be placed in a separate directory
+("lib/your_library_name/[Code]").
+
+For example, see the structure of the following example libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional. for 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
+
+Example contents of `src/main.c` using Foo and Bar:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+The PlatformIO Library Dependency Finder will find automatically dependent
+libraries by 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:nodemcu]
+platform = espressif8266
+board = nodemcu
+framework = arduino

src/main.cpp

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+#include <Arduino.h>
+#include <WiFiClient.h>
+#include <ESP8266WiFi.h>
+#include <ESP8266WebServer.h>
+#include <EEPROM.h>
+
+#define ledPin 2
+int wifiConnectStatus = 0; //WiFi connection status
+
+WiFiServer server(80);
+
+void loadWiFiSettings(char* ssid, char* password) { //Read WiFi settings from EEPROM
+  EEPROM.begin(64); //Initialize EEPROM with size 64 bytes
+  for (int i = 0; i < 32; i++) {
+   char c = EEPROM.read(i);
+  //  Serial.print(c);
+  //  Serial.print(" ");
+  //  Serial.print((int)c);
+  //  Serial.print("  ");
+   ssid[i] = c;
+   if(c =='\0'){
+    break;
+   }
+  }
+  for (int i = 0; i < 32; i++) {
+   char c = EEPROM.read(i + 32);
+  //  Serial.print(c);
+  //  Serial.print(" ");
+  //  Serial.print((int)c);
+  //  Serial.print("  ");
+   password[i] = c;
+   if(c == '\0'){
+    break;
+   }
+  }
+  EEPROM.end();
+}
+
+void saveWiFiSettings(const char ssid[32], const char password[32]) {
+  EEPROM.begin(64); //Initialize EEPROM with size 64 bytes
+  for(int i=0; i<32; i++) {
+    // Serial.print(ssid[i]);
+    // Serial.print(" ");
+    // Serial.print((int)ssid[i]);
+    EEPROM.write(i, ssid[i]); //Write SSID to EEPROM
+    // Serial.print(ssid[i]);
+    if(ssid[i] == '\0') {
+      break;
+    }
+  }
+  for(int i=0; i<32; i++) {
+    // Serial.print(password[i]);
+    // Serial.print(" ");
+    // Serial.print((int)password[i]);
+    EEPROM.write(i+32, password[i]); //Write Password to EEPROM
+    // Serial.print(password[i]);
+    if(password[i] == '\0') {
+      break;
+    }
+  }
+  Serial.println("EEPROM.end");
+  EEPROM.end();
+}
+
+int connectWiFi(const char* ssid, const char* password) { //Connect to WiFi
+  WiFi.begin(ssid,password);
+  while(WiFi.status() !=WL_CONNECTED){ // Wait for WiFi connection || Blink LED while connecting
+    digitalWrite(ledPin,LOW); // Turn on LED
+    delay(250);
+    Serial.println(".");
+    digitalWrite(ledPin,HIGH);// Turn off LED
+    delay(250);
+  }
+  wifiConnectStatus = 1;
+  return (wifiConnectStatus); // Return Connected status when WiFi is connected
+}
+
+void setup() {
+  Serial.begin(115200);
+  Serial.println("");
+  Serial.println("Environment Monitoring System - ESP8266 Firmware Ver.1.0.0.stable");
+  Serial.println("Developed by Madobi Nanami");
+  Serial.println("Personal site: https://nanami.tech");
+  Serial.println("Tech support & Feedback: yzt114@yeah.net");
+  EEPROM.begin(64);
+  pinMode(ledPin, OUTPUT);
+  digitalWrite(ledPin, LOW);
+  char ssid[32];
+  char password[32];
+  loadWiFiSettings(ssid, password); //Load WiFi settings from EEPROM
+  if(strlen (ssid) == 0 || strlen (password) == 0) { //If no WiFi settings found, set default values
+    Serial.println("No WiFi settings found in EEPROM, please set WiFi settings.");
+    Serial.println("Please enter WiFi SSID:");
+    while(!Serial.available());
+    String input_ssid = Serial.readStringUntil('\n');
+    input_ssid.trim(); // Remove any leading/trailing whitespace
+    if (input_ssid.length() > 32) {
+      Serial.println("SSID is too long, please enter a valid SSID (max 32 characters).");
+      return;
+    }
+    Serial.println("Please enter WiFi Password:");
+    while(!Serial.available());
+    String input_password = Serial.readStringUntil('\n');
+    input_password.trim(); // Remove any leading/trailing whitespace
+    if (input_password.length() > 32) {
+      Serial.println("Password is too long, please enter a valid password (max 32 characters).");
+      return;
+    }
+    if (int(connectWiFi(input_ssid.c_str(), input_password.c_str())) == 1) {
+      saveWiFiSettings(input_ssid.c_str(), input_password.c_str()); //Save WiFi settings to EEPROM
+      Serial.println("WiFi settings saved to EEPROM.");
+    } else {
+      Serial.println("Failed to connect to WiFi, please check your SSID and Password.");
+      return;
+    }
+  } else {
+    Serial.print("Loaded WiFi SSID: ");
+    Serial.println(ssid);
+    Serial.print("Loaded WiFi Password: ");
+    Serial.println(password);
+  }
+
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+}

test/README

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+
+This directory is intended for PlatformIO Test Runner 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/en/latest/advanced/unit-testing/index.html