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How to use the wireless transceiver module
How to use the wireless transceiver module? Which frequency of the wireless transceiver module is better, 2.4G, 315MHz or 433MHz? This is a question that many novices with poor basics often confuse. Today we will talk about the use skills of the wireless transceiver module, hoping to help you. The
wireless transceiver module
2.4g wireless receiving module can use the 2.4GHz free frequency band, automatic sleep design, achieve ultra-low power standby, all-round wireless remote control solution, and realize long-distance remote control function. This solution comes with a pairing function, which is simple to pair and can prevent interference from other devices.
The operating frequency of the 315MHz/433MHz wireless transceiver module is 315MHz or 433MHz (there are also other special frequencies), and the SAW resonator is used for frequency stabilization. The frequency stability is extremely high. When the ambient temperature changes between -25 and +85 degrees, the frequency drift is only 3ppm/degree. It is particularly suitable for multi-transmit and one-receive wireless remote control and data transmission systems. The frequency stability of the SAW resonator is second only to the crystal, while the frequency stability and consistency of the general LC oscillator are poor. Even if high-quality fine-tuning capacitors are used, temperature changes and vibrations can hardly ensure that the adjusted frequency will not shift.
The 433M wireless module has strong diffraction ability, high receiving sensitivity, and long distance. It is suitable for smart home, smart meter reading and other fields. It has the advantages of simple network structure, easy layout, and power-on time period. The
application point of 2.4GHz is a networking protocol developed based on its high-speed transmission rate. The 2.4g wireless module has the advantages of good adaptive function and low power consumption. It is often used in tag readers, wireless remote controllers, toy control, tire pressure monitoring, health monitoring, etc.
Performance comparison of 2.4g wireless module and 433M wireless module! If the network topology and functions are simple, one master and multiple slaves, but the network environment is complex and cost-restricted, it is recommended to give priority to 433MHz products; if the network topology is relatively complex, the functions are numerous, the network is strong, the power consumption is low, the development is simple, and the 2.4GHz product with networking function is also good.
Tips for using wireless transceiver modules
In addition, you can choose to use wireless transceiver modules according to the following tips for using wireless transceiver modules
. 1. Used to build a wireless communication network with a star topology. And it must be a multi-point star topology. Some special places require wireless communication. On the one hand, the price of this transmitting and receiving module is low, and the cost of forming a star topology is relatively low; on the other hand, this transmitting and receiving module can be modularly designed, small in size, easy to use, and easy to integrate. For wireless networks with low communication speed requirements and short distances, this transmitting and receiving module is very practical.
2. Used for wireless multi-channel (parallel) control. For example, complex remote control robots, some places require multi-channel (parallel) control. One method is to connect the receiving module directly to the decoder, and then connect it to electronic components such as relays to drive subsequent controlled objects; another method is to connect the receiving module to the microcontroller, and after data processing, use the microcontroller to connect electronic components such as relays to drive subsequent controlled objects. Usually, a pair of transmitting and receiving modules can realize up to six parallel wireless controls. If the required number of channels is greater than six, multiple pairs of transmitting and receiving modules can be used to work simultaneously to meet actual needs.
3. Used for universal serial port (C502B) wireless data transmission. Usually, many control instruments and equipment use serial ports, and communication with these devices must meet the serial port requirements. Some special places, industrial control sites. When wireless transmission must be used, it is natural to choose the transmitting and receiving modules mentioned in this article. However, it must be explained here that in order to use this communication method, the corresponding software must be compiled at the transmitting end and the receiving end to realize the file format conversion in order to achieve the purpose of wireless communication. If the communication system is full-duplex, two pairs of transmitting and receiving modules can be used to work simultaneously to achieve it.
Wireless transceiver module
Of course, there are some precautions when using wireless transceiver modules. The transmitter module should be installed vertically on the edge of the mainboard and should be at least 5mm away from surrounding devices to avoid being affected by distributed parameters. The transmission distance of the wireless transceiver module is related to the modulation signal frequency and amplitude, transmission voltage and battery capacity, transmission antenna, receiver sensitivity, and transceiver environment. Generally, the maximum transmission distance in an open area is about 800 meters. In the presence of obstacles, the distance will be shortened. Due to the refraction and reflection of the radio signal during transmission, some dead zones and unstable areas will be formed. The wireless transceiver module will have different transceiver distances in different transceiver environments.
Wireless transceiver module
The use of wireless transceiver modules is selected according to the actual development effect. Of course, without good knowledge, you don’t know how to use it. The skills of using wireless transceiver modules are obtained through years of practice
How to use wireless transmitter modules correctly:
1. The wireless transmitter module is best installed vertically on the edge of the motherboard, separated from the surrounding devices by more than 5mm to avoid being affected by the distribution parameters.
2. The transmission distance of the wireless transmitter module will be affected by the modulation signal frequency and amplitude, voltage, battery capacity, antenna placement direction, and transceiver environment.
3. The data level should be close to the actual task voltage of the wireless transmitter module to achieve a higher modulation effect.
4. Generally, the maximum transmission distance in an open area is about 800 meters. In the case of obstacles, the distance will be extended. Because the refraction and reflection in the process of radio signal transmission will form some dead zones and unstable areas, different transceiver environments will have different transceiver distances.
5. The ESD of the STX210A chip used in the wireless transmitter module is designed according to the ±2KV standard, which meets the anti-static standard of civilian electronic products. However, when the weather is relatively dry, the static electricity carried by the human body may exceed 2KV, so please wear anti-static bracelets and other anti-static equipment during production and testing to prevent the chip from being damaged by static electricity.
Application of wireless receiving module:
The wireless receiving module is a low-voltage micro-power ASK superheterodyne receiving module with independent intellectual property rights and patented technology. The module adopts high-performance RF integrated chip and high-Q dielectric resonance frequency stabilization technology, built-in temperature compensator circuit and ripple suppression circuit, with ultra-small size (12*20*2mm), low power consumption (0.3mA), low voltage, wide power supply voltage range, high sensitivity, high stability, high anti-interference, high cost performance and other characteristics, can pass lead-free certification, FCC, CE various indicators certification, is an ideal choice for various remote control systems and wireless data transmission systems.
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