Year: 2025

Indoor Distance Measurement Positioning Method Considering BLE Beacon Geometry Optimization

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Indoor Distance Measurement Positioning Method Considering BLE Beacon Geometry Optimization

Title:Indoor Distance Measurement Positioning Method Considering BLE Beacon Geometry Optimization Authors: Bi Jingxue1, Wang Yunjia2, Ning Yipeng1, Guo Qiuying1, Sang Wengang1, Cheng Na1, Yao Guobiao1 Affiliations: 1. Shandong Jianzhu University, School of Surveying and Geo-Informatics, Shandong Jinan 250101; 2. China University of Mining and Technology, School of Environment and Surveying, Jiangsu Xuzhou 221116 Abstract: Low-power … Read more

BLE Wall Switch Solution Without Neutral Wire Connection

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BLE Wall Switch Solution Without Neutral Wire Connection

Power Integrations has released a new design example report (DER-832) – this single live wire Bluetooth Low Energy (BLE) smart wall switch does not require a neutral wire connection and can power LED/fluorescent/incandescent bulbs from 3 W to 600 W. This design is based on PI’s high-efficiency LinkSwitch-TN2 offline switch power supply IC, featuring ultra-low … Read more

Essential English Word Form Transformations for Elementary Students

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Essential English Word Form Transformations for Elementary Students

Vocabulary Accumulation Vocabulary is the foundation of English learning. In elementary school, the assessment of words is not only limited to correct spelling but also to the flexible transformation and application of different parts of speech, which is a common type of question that children encounter in practice or exams—word transformation. The editor has summarized … Read more

How BLE Bluetooth Chip, Audio CODEC, and PMU Achieve $0.5

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How BLE Bluetooth Chip, Audio CODEC, and PMU Achieve $0.5

In the past two years of trade frictions, there have been at least twenty rounds of back-and-forth between China and the United States. By May of this year, BIS (the U.S. Department of Commerce’s Bureau of Industry and Security) included Huawei and its 68 affiliates on the Entity List, continuing the ongoing dispute. China plans … Read more

The Evolution of English Suffixes

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The Evolution of English Suffixes

Knowledge Sharing: The Evolution of Suffixes 1. -ble Tool Suffix, capable of, suitable for… <PIE *dhlo Phonetic Change Process: -ble<-fle (fricative > glottal fricative)<-sle<-thle<-dhle e.g. cable 电缆, reliable From Middle English, borrowed from Old French -able, from Latin -ābilis, from -a- or -i- -bilis (“capable or worthy of being acted upon”), from Proto-Indo-European i-stem form … Read more

Overview of BLE Rate Adaptive Algorithm Based on RSSI Threshold

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Overview of BLE Rate Adaptive Algorithm Based on RSSI Threshold

Sun Zhongjie （Nanjing Silan Microelectronics Technology Co., Ltd.，Jiangsu Nanjing 210042） Abstract：In recent years，how to reasonably use multiple rates for communication in BLE has received wide attention， but most studies focus on performance optimization at a single communication rate， which has a certain impact on the throughput of BLE device systems。To address these issues， a RSSI … Read more

Starving Free Solvents: Immiscible Binary Liquid Electrolytes for Li-Metal Cells

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Starving Free Solvents: Immiscible Binary Liquid Electrolytes for Li-Metal Cells

【Research Background】 Lithium metal batteries are one of the development directions for high specific energy batteries, attracting significant attention in both academia and industry. However, it is commonly believed that lithium metal electrolytes with excellent performance should use single-phase electrolytes, which often conflicts with the different properties of the anode and cathode. Therefore, the rational … Read more

Detailed Explanation of BLE Air Packet Format and Link Layer Protocol

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What are the different air packet formats in BLE? What are the common PDU commands? What is the difference between PDU and MTU? What is DLE? How does BLE implement retransmission? What is the principle of the BLE ACK mechanism? I hope this article can help answer these questions. Although the BLE air packet (also … Read more

Why Our Wearable Device Does Not Use Bluetooth (BLE) Protocol

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Why Our Wearable Device Does Not Use Bluetooth (BLE) Protocol

Why Our Wearable Device Does Not Use Bluetooth (BLE) Protocol Introduction After 2010, with the promotion of low-energy Bluetooth protocol, the power consumption problem of traditional Bluetooth protocol has been greatly solved. Along with the development of smartphones, there has been a significant wave of smart hardware, including various wearable devices centered around smartphones, such … Read more

In-Depth Analysis of BLE Connection Establishment Process

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In-Depth Analysis of BLE Connection Establishment Process

Why can the same smartphone connect successfully with some devices but fail with others? Why can the same device connect with some smartphones but not with others? Why does the same smartphone connect quickly with the same device at times and slowly at others? What is a Master? What is a Slave? What are Connection … Read more