The home lighting system is closely related to the people's life. Most families still use ordinary switches. The switch can only control a group of lamps. The existing wireless remote switch has a short service life, generally 2 to 3 years. The design of a new wireless remote control switch can realize the control of the lighting system, and at the same time, it can effectively increase the service life so that people can use it safely and safely. Taking the wireless control of daily electric light as the research object, the Si1000 wireless transceiver chip developed by SILICon Laboratories is used to design a wireless remote control switch with high reliability and power saving convenience. The Si1000 integrates the C8051f9xx low-power single-chip microcomputer and the Si4432 RF module, and uses this chip to design a remote control switch with a frequency of 433.92 MHz, which is simple in structure and stable in performance. Other applications.
1 wireless remote control switch worksThe wireless remote control multiplex switch is composed of a handheld remote control and a receiving control implementation unit, and the system block diagram is shown in FIG. 1 .
The working principle of the wireless remote control multiplex switch is as follows: First, the corresponding function key signal is input through the key circuit, and the internal single chip computer carries out information coding on the input key signal, and at the same time, the address code information is added, thus forming an address coded information and the corresponding light switch control. The state information encodes the pulse signal, which is then modulated. The modulated signal is then amplified and tuned and transmitted by the radio frequency transmitting circuit. The radio receiving circuit receives the carrier modulation signal transmitted from the handheld remote controller and demodulates it. The address code is verified and confirmed. If the remote control address code matches, the coded pulse signal is decoded to obtain data. The Si1000 internal single chip microcomputer controls the switch circuit, and corresponding high and low level control circuits are output from the pin, thereby realizing the radio. Light control. Otherwise, no decoding is performed and the microcontroller control circuit has no response.
2 system design2.1 Chip Introduction
Silicon Labs' Si1000 chip family integrates an ultra-low-power C8051f9xx microcontroller and a wireless RF module. When the processor performs data-related operations, it can provide very low operating current, thereby reducing power consumption. The Si1000 has low power consumption. The characteristic makes its working voltage be 0.9- 3.6 V, can use the battery to supply power completely. The Si1000 series wireless microcontroller integrates a 25 MHz 8051 core, an EZRadioPRO series RF transceiver that is slightly lower than 1 GHz, a maximum 64 kB Flash, and an ADC with up to 12-bit resolution. At the same time, the internal FLASH memory of Si1000 has the programming capability, which is convenient for users to further develop and use, and uses the C2 interface for joint debugging of software and hardware, which is convenient and quick.
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