Connect to Multiple WiFi Networks Safely
Try SSIDs sequentially with timeout and internet check.
📚 Category: Esp32 Networking
ESP32 WebServer (Async) Basics
Serve a page and a simple JSON API.
File Upload via Web UI (SPIFFS)
Upload files to SPIFFS using AsyncWebServer.
HTTP Client: GET/POST with Retry
Use HTTPClient with basic retry/backoff.
HTTPS Client: Certificate/Fingerprint
Secure requests with CA cert or fingerprint.
MQTT Basics: Pub/Sub & Keepalive
Connect to broker, publish sensor data, auto-reconnect.
NTP Time Sync + DS3231 Fallback
Keep time via NTP, fall back to RTC.
OTA Update: Web Updater & HTTP
Update firmware via browser or HTTP server.
SPIFFS/LittleFS: Read/Write JSON
Store config as JSON in FS.
WebSocket Realtime Updates
Push sensor data to browser via WebSocket.