In recent years, traditional lighting systems have largely relied on wired and mechanical control methods, which often lack flexibility and efficiency. To address these limitations, this article introduces an innovative approach leveraging the Internet of Things (IoT) technology. By embedding an intelligent control module into LED lighting terminals, the proposed system combines embedded technology, wireless sensor networks, and other advanced technologies to enable intelligent, digital, and wireless lighting control. Additionally, the system incorporates features like ambient temperature, humidity, and illuminance monitoring.
The rapid adoption of LED lighting and the growing prevalence of mobile internet technologies have led to heightened consumer expectations for smarter, more energy-efficient home environments. People now expect their household appliances, lighting fixtures, and security systems to be integrated into a unified control platform for seamless operation and management. As the IoT industry continues to evolve, smart LED lighting has emerged as a key component of this technological landscape.
This article presents an intelligent LED lighting control system designed to promote "Green Smart Lighting." Utilizing IoT and embedded technologies, the system allows for wireless remote control of various LED lamp settings, including different lighting modes. Within the operational range of the LED lights, the system monitors ambient illumination levels and the operational status of the lamps in real-time. Sensor technology is employed to adjust illumination adaptively and facilitate dynamic color conversion of the lights, creating a comfortable, energy-saving, and secure lighting environment.
Figure 1 illustrates the overall architecture of the system:
### System Hardware Design
The hardware design of the system comprises two primary components: the LED lighting control terminal and the touch panel, which work together to enable intelligent lighting control of LED lamps. The hardware design includes a control module, communication module, power module, and other essential components.
#### Main Control Unit
The main control unit of the LED intelligent lighting control system consists of two main parts: the LED lighting control terminal and the data acquisition terminal. The LED lamp control terminal is built around the ARM processor STM32 as the core, incorporating a power supply circuit, peripheral circuitry, and an illumination sensor. The data acquisition terminal comprises temperature and humidity sensors, an illuminance sensor, and a PM2.5 sensor. The hardware circuit schematic is illustrated in Figure 2 below:
#### Touch Panel Hardware Design
The touch panel's hardware circuit is based on the latest generation ARM processor STM8S. The STM8S series processor comes equipped with a touch software library, enabling capacitive touch sensing through the charge transfer properties of capacitors. In the intelligent lighting control system, the touch panel primarily handles LED lighting fixture switches and brightness adjustments via scroll bars. The circuit schematic is shown in Figure 3:
#### ZigBee Wireless Communication Module Design
To achieve centralized management and environmental monitoring functionalities for the LED intelligent lighting system, this project employs a ZigBee wireless module based on IoT technology to establish a communication network. The system’s ZigBee wireless communication module utilizes the CC2530 module. The TI CC2530 is a true System-on-Chip (SoC) CMOS solution, offering enhanced performance while maintaining low cost and low power consumption. It combines a high-performance 2.4GHz Direct Sequence Spread Spectrum (DSSS) RF transceiver core with an industrial-grade compact and efficient 8051 microcontroller.
#### Power Module Design
Considering the application in a home setting, where the primary power supply is typically 220V AC, the power module is designed to use multiple discrete components to create different voltage regulator circuits. Among these, 3.3V and 5V power supplies are derived from converting the 220V AC power supply into a 12V DC power supply using a switching power supply. The +12V to +5V conversion uses the LM2576 series regulators, which can drive loads up to 3A with excellent linearity and load regulation. The schematic for the +5V power supply is shown in Figure 4:
The +5V to +3.3V conversion employs the AMS1117 voltage regulator, capable of providing 1A of output current with a minimum input voltage of 1V and an output of +1V. After regulation to +3.3V from +5V, it powers the CPU and other chips. The schematic diagram of the +3.3V power supply is shown in Figure 5:
### System Software Design
The software design focuses on collecting and transmitting data related to LED intelligent lighting control and environmental parameters. Through the ZigBee wireless communication network, the system enables centralized management and data collection of LED lamps.
### Conclusion
Through extensive research and development, this article demonstrates how adjusting LED lamp brightness and color based on LED characteristics, along with the addition of brightness and human detection sensors, can create an intelligent, digital, and networked LED lighting system. The design is both innovative and practical, utilizing advanced lighting technologies to meet modern application demands. With excellent expandability, the system offers significant energy savings and holds immense potential for widespread adoption and commercial success.
Dongguan City Yuanyue Electronics Co.Ltd , https://www.yyeconn.com