将WiFi凭据保存到ESP8266上的EEPROM

#include <ESP8266WiFi.h>
#include <EEPROM.h>

// 定义WiFi凭据
const char* ssid = "YourWiFiSSID";
const char* password = "YourWiFiPassword";

// 定义EEPROM地址
#define SSID_ADDRESS 0
#define PASSWORD_ADDRESS 32

void setup() {
  // 初始化串口
  Serial.begin(115200);

  // 初始化EEPROM
  EEPROM.begin(512);

  // 读取WiFi凭据
  String savedSSID = "";
  String savedPassword = "";
  for (int i = 0; i < 32; ++i) {
    savedSSID += char(EEPROM.read(SSID_ADDRESS + i));
    savedPassword += char(EEPROM.read(PASSWORD_ADDRESS + i));
  }

  // 连接到WiFi网络
  if (savedSSID.length() > 0 && savedPassword.length() > 0) {
    WiFi.begin(savedSSID.c_str(), savedPassword.c_str());
    Serial.println("Connecting to WiFi...");
    while (WiFi.status() != WL_CONNECTED) {
      delay(1000);
      Serial.print(".");
    }
    Serial.println("\nConnected to WiFi");
  } else {
    // 进入配置模式
    configureWiFi();
  }
}

void loop() {
  // 主循环
}

void configureWiFi() {
  // 配置模式
  Serial.println("WiFi credentials not found. Entering configuration mode.");

  // 读取新的WiFi凭据
  String newSSID = "";
  String newPassword = "";
  Serial.print("Enter WiFi SSID: ");
  while (newSSID.length() == 0) {
    newSSID = Serial.readString();
    newSSID.trim();
  }
  Serial.print("Enter WiFi password: ");
  while (newPassword.length() == 0) {
    newPassword = Serial.readString();
    newPassword.trim();
  }

  // 保存新的WiFi凭据到EEPROM
  for (int i = 0; i < newSSID.length(); ++i) {
    EEPROM.write(SSID_ADDRESS + i, newSSID[i]);
  }
  for (int i = 0; i < newPassword.length(); ++i) {
    EEPROM.write(PASSWORD_ADDRESS + i, newPassword[i]);
  }
  EEPROM.commit();

  // 重启ESP8266
  ESP.restart();
}