Introduction to Zigbee communication technology transmission distance and wall penetration capability

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Introduction to Zigbee communication technology transmission distance and wall penetration capability [Copy link]

Zigbee is mainly used between various electronic devices within a short range and with low data transmission rates. The name Zigbee comes from the communication method used by bee colonies for survival and development. They share information such as the location, distance and direction of newly discovered food sources by dancing in the shape of zigbees. In itself, ZigBee is not an advantage in penetrating walls. It is more reflected in networking. To improve the ability of ZigBee to penetrate walls, it is generally recommended to increase the power amplifier of ZigBee, amplify the signal to achieve the continuity of the penetrating distance, or use a relay method. The technical features of Zigbee mainly include the following parts: 1. Low data transmission rate. Only 10kb/s~250kb/s, focusing on low transmission applications. 2. Low power consumption. In low-power standby mode, two ordinary No. 5 dry batteries can be used for more than 6 months. This is also the unique advantage that Zigbee supporters have always been proud of. 3. Low cost. Because Zigbee has a low data transmission rate and a simple protocol, it greatly reduces costs. Motorola and Philips, which have actively invested in the development of Zigbee, have officially launched chips in 2003. Philips estimates that the cost of chips used in the host and other terminal products is more price competitive than Bluetooth. 4. Large network capacity. Each Zigbee network can support up to 255 devices, which means that each Zigbee device can be connected to another 254 devices. 5. Small effective range. The effective coverage range is between 10 and 75 meters, depending on the actual transmission power and various application modes. It can basically cover ordinary home or office environments. 6. Flexible working frequency bands. The frequency bands used are 2.4GHz, 868MHz (Europe) and 915MHz (USA), all of which are license-free bands. Comparison between ZigBee and other short-range wireless communication technologies:

Let's take a brief look at some possible applications of ZigBee modules, including smart home, industrial control, automatic meter reading, medical monitoring, and sensor network applications. Smart home: There may be many electrical and electronic devices at home, such as lights, televisions, refrigerators, washing machines, computers, air conditioners, etc., and there may also be smoke sensors, alarms, cameras and other devices. In the past, we could only achieve point-to-point control at most, but if ZigBee technology is used, these electronic and electrical devices can be connected to form a network, and can even be connected to the Internet through a gateway, so that users can easily monitor the situation in their homes anywhere, and save the trouble of wiring at home. Industrial control: There are a large number of sensors and controllers in the factory environment. ZigBee technology can be used to connect them into a network for monitoring, strengthen operation management, and reduce costs. Automatic meter reading: Meter reading may be something that everyone is familiar with. For example, gas meters, electricity meters, water meters, etc., you may need to count the readings every month or every quarter, report them to the gas, electricity or water supply company, and then charge according to the readings. Now in most places, meter reading is still done manually, knocking on doors one by one, which is very inconvenient. ZigBee can be used in this field, using sensors to convert meter readings into digital signals, and sending the readings directly to the gas or water and electricity companies through the ZigBee network. Using ZigBee for meter reading can also bring other benefits, such as gas or water and electricity companies can directly send some information to users, or combine it with energy saving, when it is found that energy is used too fast, it can automatically reduce the usage speed. Medical monitoring: Electronic medical monitoring is a recent research hotspot. Many sensors are installed on the human body, such as measuring pulse and blood pressure, monitoring health status, and placing some monitors and alarms in the environment around the human body, such as in the ward environment, so that the physical condition of the person can be monitored at any time. Once a problem occurs, a timely response can be made, such as notifying the hospital staff on duty. These sensors, monitors and alarms can form a monitoring network through ZigBee technology. Because it is a wireless technology, there is no need for wired connection between sensors, and the monitored person can also move more freely, which is very convenient. Sensor network application: Sensor network is also a recent research hotspot, and has good application prospects in areas such as cargo tracking, building monitoring, and environmental protection. Sensor networks require nodes to be low-cost, low-power, and able to automatically network, easy to maintain, and highly reliable. ZigBee's advantages in networking and low power consumption make it a good technical choice for sensor network applications.