Ultrasonic HC-SR04 with Median Filter
Distance measurement with noise reduction.
📚 Category: Esp32 Basics
Preferences (NVS): Store Key‑Value
Save WiFi credentials using Preferences.
PZEM004T v3: Energy Monitoring Basics
Read voltage/current/power — safety notes included.
Setting up PlatformIO & Arduino IDE for ESP32
Install VS Code+PlatformIO or Arduino IDE 2.x with ESP32 board support.
Introduction to ESP32 & Its Ecosystem
What ESP32 is, how it differs from ESP8266, and which board to start with.