To address the problems of traditional LED control systems

such as single functionality

lack of environmental perception linkage capability

and insufficient human–computer interaction

this paper proposes and implements a multifunctional environmental sensing LED control system based on the IAP15F2K61S2 microcontroller. The system takes the microcontroller as the core controller and integrates a dual-color LED array

a 0.96-inch OLED display

a light intensity sensor module

and a DHT11 temperature and humidity sensor. It realizes three core functions: dynamic LED flashing mode control

environmental illumination threshold linkage response

and temperature over-limit alarm. Meanwhile

serial communication is employed to complete command interaction with the host computer

and the OLED display provides real-time feedback on the system operating status. In the design process

the hardware architecture was constructed

circuit schematics were developed

and PCB layout design and fabrication were completed. Modular programming was adopted to implement the software logic

followed by hardware soldering and functional debugging. Experimental results show that the system can stably achieve switching among eight LED flashing modes

accurately sense illumination and temperature

and perform corresponding linkage control. The OLED display operates in real time without garbled characters

and the serial commands respond quickly. The overall system features low power consumption

stable operation

and user-friendly human–computer interaction

providing a feasible design reference for embedded environmental sensing and intelligent lighting control systems.