Design of indoor lighting wireless control system based on A7105 wireless transceiver module

With the development of computer technology, communication technology and automation technology, lighting control technology has made great progress, and gradually entered the era of intelligent control. Intelligent lighting control technology has developed with the development of architecture and lighting technology. In the process of implementing green lighting projects, lighting control is a very important content, especially with the continuous emergence of large buildings, lighting energy saving and lighting control are becoming more and more important. increasingly important.And lighting is not only to meet people’s visual bright requirements, but also to meet artistic requirements, to create a rich and colorful artistic conception, to give people visual enjoyment, which also requires safety and flexibility in lighting control

With the development of computer technology, communication technology and automation technology, lighting control technology has made great progress, and gradually entered the era of intelligent control. Intelligent lighting control technology has developed with the development of architecture and lighting technology. In the process of implementing green lighting projects, lighting control is a very important content, especially with the continuous emergence of large buildings, lighting energy saving and lighting control are becoming more and more important. increasingly important. And lighting is not only to meet people’s visual bright requirements, but also to meet artistic requirements, to create a rich and colorful artistic conception, to give people visual enjoyment, which also requires safe, flexible and economical lighting control. This paper summarizes the development process of lighting control, proposes the control methods applicable to different buildings and different locations, and discusses with colleagues, hoping to play a role in attracting new ideas. The literature reports that a new type of indoor intelligent lighting control system is proposed on the basis of ZigBee sensor network technology, but the practical indoor lighting controller must be low-priced. At present, the price of wireless transceiver chips based on the ZigBee protocol standard is The cheap ones are also more than ten yuan, which makes the price of the switch node too high.

AMICCOM (shengke) launched a 2.4 GHz wireless transceiver chip A7105 in 2008. The outstanding features of this chip at a low price have won it a huge advantage in the wireless short-distance consumer market. However, compared with the standard chips of the ZigBee series, the development of A7105 does not have a standard protocol, which greatly increases the difficulty of its development, which is also the main reason why the chip has not been widely used. This paper uses the A7105 wireless transceiver module after secondary development, and designs the hardware and software circuits of the sending and receiving ends. The transmitting end realizes data transmission through key control. After the receiving end receives the signal, it controls the on and off of the LED to realize the wireless control function, which lays a good foundation for further research on the practical indoor lighting wireless remote control system.

1. A7105 and wireless transceiver module

The A7105 contains a high-sensitivity receiver (1 [email protected] dBm), which can greatly reduce the RF output power (0~10 dBm) in product applications within 10 meters, and can also adapt to applications in general environments of 50 meters. . All parameters of the A7105 can be set through the SPI port configuration internal registers, the highest rate can reach 500 kb/s, suitable for 4-wire or 3-wire SPI control. A7105 has built-in RSSI, temperature sensor, which can be used to detect the influence of the environment on RF IC, and also has a built-in ADC for voltage detection.

The specific characteristics of the A7105 chip are as follows: 1) The frequency band is 2 400~2 483MHz (ISM frequency band); 2) FSK/GFSK modulation; 3) The transmit current is 19 mA (output 0 dBm); 4) The receiving current is 16 mA; 5 ) Sleep current < 1 μA; 6) Built-in RA oscillator; 7) High sensitivity: -99 [email protected]

“With the development of computer technology, communication technology…

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