This video introduces an embedded system project that uses an ESP32 camera module to count LED flashes from your electricity meter and track energy consumption. Learn how the TTGO T-Camera (a 2-megapixel ESP32-CAM variant with built-in OLED display) captures PWM pulse signals—where each LED flash represents an impulse toward your energy usage. We'll explain the core concept: counting square wave transitions as the LED turns on and off, with approximately 1600 flashes equaling one kilowatt-hour (kWh) of consumed energy. The tutorial covers hardware selection, positioning the camera to detect brightness changes accurately, and integrating the OLED screen for real-time pulse counting visualization. Perfect for DIY home automation enthusiasts building their own smart energy monitoring solutions. GitHub Repository: #ESP32 #ESPCAM #EnergyMonitor #IoT #Arduino #DIY #HomeAutomation #TTGO #OLED #ElectricityMeter #PulseCounting #EmbeddedSystems #Electronics #SmartHome