Bluetooth is a term we are all too familiar with, from Bluetooth headphones, Bluetooth mice, to Bluetooth speakers… Bluetooth is closely related to our lives. But what exactly is Bluetooth? This story begins with a Danish king Bluetooth is actually a short-range wireless communication technology, an open global standard for wireless transmission of voice and … Read more
Source: Sensor Technology We are all too familiar with the term Bluetooth. But what exactly is Bluetooth? This story begins with a Danish king Bluetooth is actually a short-range wireless communication technology that enables short-distance data exchange between fixed devices, mobile devices, and personal area networks in buildings (using UHF radio waves in the 2.4–2.485GHz … Read more
Today’s Tech News Recent reports indicate that Samsung is set to launch the Galaxy Note 8 at the end of August, several months ahead of iOS phones entering the market. Rumors about the Note 8 surfaced back in April, suggesting that the phone will have a narrower bezel, a larger screen, and dual cameras. Traditionally, … Read more
In a recent cybersecurity study, Tesla’s keyless entry system revealed a major security vulnerability, allowing attackers to unlock a Tesla Model 3 or Model Y within 10 seconds through a BLE (Bluetooth Low Energy) relay attack. The method to execute this attack is not complicated. It merely requires placing a decoding sensing device near the … Read more
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
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 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
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
Note: Table 1 was formulated by the Ministry of Industry and Information Technology of China in 1985, and Table 2 was formulated in 1992. It stipulates that the channel spacing for cordless phones is 25KHz, with a maximum transmission power of 50mW for landline phones and 20mW for mobile phones. The transmission categories are F3E; … Read more
In recent years, short-range wireless communication technologies have developed rapidly, greatly enhancing our work efficiency and convenience in life. Applications such as NFC door unlocking, Bluetooth wireless headphones, and Wi-Fi portable hotspots all rely on wireless communication technology. Currently, several mature wireless communication technologies include ZigBee, Bluetooth, infrared (IrDA), and wireless local area networks (Wi-Fi). … Read more