I wrote an Android app and used the following Android code to send a character. I want to know which callback of Bluenrg will be called after sending the character?
BluetoothGattService gattService =
...
[i=s]This post was last edited by jameswangsynnex on 2015-3-3 19:59[/i] [:)][:)]The naming convention of Acer notebooks: Travel Mate is positioned for business applications, and generally uses ordin...
For the home LED clock, a low-power sleep mode chip was selected mainly to save power, but the effect of the crystal oscillator frequency on the overall current is unknown, and the parameter standards...
Reprint: Anxinke open source team is dedicated to writing and sharing the initial technical exchange of ESP32-A1S offline voice1. Introduction2. Offline speech framework2.1 Algorithm model WakeNet and...
As shown in the figure below, NMOS and PMOS are used as a protection circuit to prevent reverse connection of the power supply. [1] The circuit diagram of the PMOS tube is easy to understand. For the ...
In the circuit below, what are the functions of the resistors connected behind the rectifier bridge and the three resistors in the red box? What do they mean and what are their main functions?...
"In every city, street lamps are densely distributed and can be used as small 5G base stations, saving a lot of cost of duplicate construction." On November 21, at the "2019 China Innovation Confer...[Details]
Simple and practical 3V voltage regulator circuit
In common circuits, we often use 3V voltage. Many people often use voltage regulator IC, LDO, etc., but they are relatively expensive. This simple ...[Details]
The name of the watchdog is quite interesting. Its function is to bite the owner when he is distracted to wake him up. In practical terms, when the MCU enters an infinite loop somewhere during operat...[Details]
Dutch technology blog LetsGoDigital reported that Samsung submitted a patent application for a "foldable electronic device" in June 2020, which was officially disclosed by the World Intellectu...[Details]
Sinusoidal signal is one of the very important signals in electronic circuit design. In many electronic devices and systems, sinusoidal signals are required as input sources. The design of sine signa...[Details]
At the press conference on March 28, Xiaomi CEO Lei Jun officially announced the prices of various versions of Xiaomi SU7. At the same time, Lei Jun announced the special launch of 5,000 Xiaomi SU7...[Details]
Recently, Huawei released Mate60, triggering a global wave of chip disassembly. The importance of chips is evident. With the development of smart cars, the number and value of in-vehicle chips are ...[Details]
At the 2024 CES show, which opened on January 9, the BMW Group demonstrated BMW's new digital technology and human-computer interaction development direction. It not only brought XREAL Air 2 augmente...[Details]
I am working on the online upgrade bootloader program for Freescale 16-bit microcontrollers. There are two questions that I am not very clear about. I would like to ask the experts in the forum. 1. ...[Details]
Is it troublesome to repair the R&S oscilloscope RTE1204? What should I do if the R&S oscilloscope RTE1204 fails? Have you ever encountered out-of-tolerance conditions on the R&S oscilloscope RTE1204...[Details]
Electromagnetic compatibility ( EMC ) refers to the ability of electronic equipment to work in a coordinated and effective manner in various electromagnetic environments. The purpose of electromagnet...[Details]
1 Introduction: Decimation filters are widely used in the field of digital reception and are the core part of digital downconverters. Currently, there are three ways to implement decimation filters...[Details]
On June 28, witnessed by Qian Zhimin, Party Secretary and Chairman of SPIC, and Cao Renxian, Chairman of Sungrow, SPIC and Sungrow signed a strategic cooperation agreement. According to the agreeme...[Details]
1. Introduction
The vacuum treatment of molten steel is used for dehydrogenation, denitrification, deoxidation (light treatment) and desulfurization of molten steel, and it also has the functi...[Details]
1 Introduction
As a public information display terminal in the subway, LED display screen has very wide civil and commercial value.
At present, most subway vehicles in China are equipped wi...[Details]