Esp32-s2 design network /fm dual-purpose radio

This is the function of network radio and FM radio realized by an engineer based on the esp32-s2 platform of “summer training together” of hard wo school. The project is open source on the project page of electronic forest (click “read the original text” in the lower left corner). The following is the content of […]

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What is a Wi Fi module? How to realize the security of Internet of things with WiFi

In the deployment of industrial Internet of things, wireless technology (excluding low-power) can be roughly divided into cellular or short-range wireless. Short range wireless includes Wi Fi, Bluetooth, ZigBee and various other protocols. Embedded system designers usually decide to use off the shelf and certified wireless modules, rather than designing wireless communication circuits from scratch. […]

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Indoor location refinement scheme based on Bluetooth direction finding

With the help of global navigation satellite system (GNSS) technology, most of us now take it for granted that we can accurately locate outdoor objects or people. The level of precision that can be achieved – especially when you use GNSS to enhance data services – is unlocking real transformation use cases, including autonomous vehicle […]

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What are the ways in which the Internet of things transmits data

With the advent of the era of interconnection of all things, the connection between things is also developing and updating. If the sensor is the touch of the Internet of things, then wireless transmission is the nervous system of the Internet of things, connecting the sensors all over the Internet of things. Before the emergence […]

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The application field of UAV continues to expand and is expected to enter a more intelligent and miniaturized era

In recent years, with the growing outbreak of the consumer market, the popularity of UAVs has risen again and again. From the first “military weapon” to today’s “selfie artifact”, “air traffic police”, “mapping expert” and “mobile wifi”. The continuous expansion of UAV application field and the continuous prominence of application value are driving the rapid […]

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Differences and advantages of GPS, LBS, AGPs, WiFi and ibeacon positioning

Positioning has entered thousands of households. The most common ones you have heard of may be GPS in the United States and Beidou in China, but there are still many auxiliary positioning. This article only talks about the differences between these positioning methods. GPS positioning Principle: the receiver receives the satellite broadcast signal and needs […]

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This paper discusses 5g FWA technology

Although the 5g mobile communication test is under way, due to the huge investment scale required, most industry analysts expect that a comprehensive network deployment will take several years. Global mobile operators must find a balance between future investment demand and short-term cash flow. Although fixed wireless access (FWA) is an established service, it is […]

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Design principle analysis of ultrasonic liquid level measurement system

Working frequency: the resonance frequency of piezoelectric wafer. The longer the wavelength, the smaller the frequency and the larger the detection distance, but the accuracy will be reduced. Sensitivity: the higher the output power, the higher the sensitivity. Beam angle: when the energy intensity is reduced by half (- 3dB) with the extension line of […]

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