The communication method is an important part of the LED intelligent control system. The communication protocol used in this solution is RT4CE. RF4CE is an RF remote control standard for the home appliance industry jointly proposed by the ZigBee Alliance and the RF4CE Alliance in 2009. Its goal is to eventually replace the widely used infrared remote control technology. RF4CE is a network layer and application layer protocol based on IEEE802.15.4 physical layer and MAC layer. It has non-line-of-sight transmission, two-way communication, ultra-low power consumption, good interoperability, and free ISM frequency band. It can be used as home automation. An important wireless communication platform for entertainment applications.
system structure
The LED lighting control system consists of a remote control and a high-power LED dimmer. Both sides are connected wirelessly through the CC2530 module with built-in RF4CE protocol. Figure 1 shows the device structure of the LED control system. The user inputs the control command by using the remote control button, and the command is sent to the dimmer in the form of a data packet conforming to the RF4CE protocol. The dimmer generates three sets of PWM outputs of R, G, and B according to the command requirements, combined with the current working state, and controls the red, The power of three high-power LED lights, green and blue, forms the desired light intensity or color temperature effect. The EEPROM in the dimmer is used to store the PWM sequence (ie recipe table) for the particular lighting effect.
Figure 1 LED control system structure
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