The Design And Implementation Of Indoor LED Lighting System Terminal Based On WIFI

In recent years, with the continuous development of internet of things, smart city and smarthome have been known by more and more people. In this paper, indoor LED lighting system basedon WIFI is one of the representative work of the construction of Internet of Things. The wholesystem mainly consists of mobile client and the system controlled terminal: among them, the mobileclient through the interface to express the user’s specific requirements. System terminal on the onehand, are used to implement the LED lamp control operations such as turning on the lights, turningoff the lights, dimming, etc. On the other hand the WIFI equipment can be used to implementparameter modification functions such as SSID, passwords, etc.This article focuses on the content of terminal function of the system implementation process.Terminal system is mainly composed of three parts: the WIFI wireless communication moduleRT5350, AVR microcontroller and adjustable light LED drive power supply.Among them, the WIFIwireless transceiver module is mainly responsible for data exchange between mobile phone and theclient terminal. And WIFI wireless transceiver module is the bridge between the user’s mobilephone and wireless LED lights to achieve wireless communication. Control part of the system isimplemented by ATmega8microcontroller, whose effect is processing specific instructionsinformation received by system terminal via WIFI module, namely to parse and execute the relevantcommand packet. Adjustable constant current drive is composed by the AC-DC constant voltagesource and constant current source with PWM dimming function.It can be used as a power supplyequipment to terminal LED lights, WIFI module,ATmega8MCU.Finally, it completely finish system data wireless transceiver and control processthrough theWIFI module is implemented and ATmega8microcontroller.It also made a comprehensive test tothe overall system performance and the LED constant current drive performance. Test results showthat the system data transmission stability, responsive, has high success rate, the ultimate can meetdesign requirements. LED drive could be used normal and power factor (PF), efficiency (), theoutput voltage (Vo), the output current (Io), etc all can achieve targets beforehand, circuit stablework.