ESP32 Smart Lighting (PIR + LDR + Relay + OLED)

Turn your hallway, bathroom, or pantry into smart lighting with ESP32! Using a PIR motion sensor, LDR light sensor, and a relay module, we build the classic "light turns on when motion is detected in the dark" scenario — if the environment is already bright, motion does NOT trigger the light, saving energy during the day. The light stays on for 30 seconds; if motion continues, the timer resets and the light stays on longer. The SSD1306 OLED shows large-font status (ON / DAYTIME / WAITING), a cou