SimplePrefsPlus

SimplePrefsPlus is an easy-to-use, secure, and lightweight preferences storage library for ESP8266 and ESP32 microcontrollers. It wraps around Preferences (ESP32) or LittleFS (ESP8266) and adds AES-128 encryption, automatic key setup, and optional Web UI for configuration.

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✨ Features

• 🔐 AES-128 CBC encryption of stored key-value pairs.
• 🔄 Automatically enters setup mode if no key or invalid key is found.
• 📦 Compact and portable with minimal RAM/Flash usage.
• 🧠 Uniform API for ESP8266 and ESP32.
• 🌐 Optional Web UI interface for initial key provisioning.
• ✅ Works with strings, ints, floats, bools, etc.
• 💾 Uses Preferences on ESP32 and LittleFS on ESP8266.

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📦 Installation

• Place the library folder in your Arduino libraries/ directory.
• Ensure you have the latest ESP8266/ESP32 board support installed.

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🔧 Basic Usage

#include <SimplePrefsPlus.h>

SimplePrefsPlus prefs("config");

void setup() {
  Serial.begin(115200);
  
  if (!prefs.loadKey()) {
    Serial.println("No valid key found. Setup required.");
    while (true); // Block here for setup
  }

  prefs.begin();
  prefs.putString("ssid", "MyWiFi");
  prefs.putInt("boots", 5);
  prefs.end();

  prefs.begin();
  String ssid = prefs.getString("ssid", "none");
  int boots = prefs.getInt("boots", -1);
  prefs.end();
}