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 =
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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?...
As shown in the picture below, does this Type-C female socket need to be mounted with a machine sticker?Some surface mount pins are hidden under the shell, what should I do when doing manual soldering...
A new vivo phone, vivo V21 SE, recently appeared on Google Play Console. The phone is equipped with a Qualcomm Snapdragon 720G processor, 8GB of memory, and a screen resolution of 1080 x 2400...[Details]
The multiplexed function of PD3 is TIM2_CC2, which can be used to test the PWM function. This example uses a potentiometer to adjust the PWM pulse width to adjust the brightness of LED1 connected to P...[Details]
When you think of making electronic measurements, you immediately think of acquisition instruments, which are usually an oscilloscope or a logic analyzer. However, these tools are only useful when th...[Details]
On April 30, 2021, SAE released the fourth edition of J3016 "Driving Automation Classification", which is another iterative update of J3016 after January 16, 2014, September 30, 2016, and June 15, 20...[Details]
LG's retail stores in South Korea will start accepting pre-orders for 55-inch OLED TVs this week, priced at 11 million won (about $10,340). Samsung, the world's largest TV maker, already dominates the...[Details]
Recently, TCL founder and chairman Li Dongsheng said in an interview with Xinhuanet and other media that TCL's resumption of work and production is progressing smoothly, with the resumption rate reac...[Details]
Fault phenomenon The wrong number 5022 was dialed when the machine was turned on, the module was not recognized, and the serial number was lost. Testing process After inspection, it was found that ...[Details]
Recently, according to the official account of the "Ministry of Public Security Testing Center", the new standard for the smart lock industry, "Electronic Anti-theft Locks" (GA 374-2019), which took ...[Details]
There is a domestically produced MCU ne76e003 which is said to be able to be perfectly replaced pin to pin. Key information and prices Comparison of technical indicators between N76E003AT20 and S...[Details]
Continue to learn core initialization-disable interrupts
Everyone is familiar with the concept of interrupts. The concept of interrupts is introduced in the 89C51 microcontroller series. In the 89C51...[Details]
"Three highs and one low" actually refers to the high color rendering, high light efficiency, high reliability and low cost in LED display technology. How to achieve low cost while making the qua...[Details]
On June 16, 2016, WPG Holdings, a leading semiconductor component distributor dedicated to the Asia-Pacific market, announced that its subsidiary WPI has launched the Intel E3800 series industrial rob...[Details]
Today, the Ministry of Industry and Information Technology officially issued 5G commercial licenses to China Mobile, China Unicom, China Telecom, and China Broadcasting Corporation, which means that ...[Details]
According to foreign media reports, researchers at the Massachusetts Institute of Technology (MIT) have created a diamond-based quantum sensor on a silicon chip for the first time, paving the way for...[Details]
Shanghai, China, October 31, 2024 –
Toshiba Electronic Devices & Storage Corporation (“Toshiba”) today announced that it has begun shipping engineering samples of the TB9084FTG, a gate driver I...[Details]