After zigbee collects data and sends it to nb-iot, the data cannot be displayed normally.
This is a screenshot of the serial portThis is a screenshot of the cloud...
Hi, everyone! There are new changes in our forum. The markdown editor was launched this week. Netizens who like to write articles in markdown can use it happily! ! The specific location of the markdow...
1. A total of 6 passwords can be set, and the value of each password ranges from 1 to 6. 2. Users can set and modify passwords by themselves. 3. There will be a sound prompt when pressing each key and...
Source: Vanadium Titanium Xiake
1. I feel a little sorry for the "vanadium electricians"
Finally, the "China Vanadium Battery Industry Development Report (2024)" was put down and ...[Details]
At this point in time, even those who don’t know much about cars will know that electric vehicles are definitely the general trend of the future, and there will be basically no suspense. However, dif...[Details]
Satellites, hybrid electric vehicles (HEV), uninterruptible power supplies (UPS), green energy, and high-power battery systems rely on bidirectional, renewable energy systems and devices to store ene...[Details]
You may have heard that high-pitched screams can shatter glass, but have you heard that screams can clean glass? With precisely controlled high-frequency vibrations, ultrasonic cleaning technology ...[Details]
The structure and working principle of thyristor
A P1N1P2N2 four-layer three-terminal device based on silicon single crystal was created in 1957. Because its characteristics are...[Details]
1 Introduction
Switching power supply (hard switching mode) has now been put into practical use and commercialized. Its outstanding advantages of high efficiency, small size and light weight h...[Details]
On May 29, the Weipai coffee series launched its eighth OTA upgrade, with a total of 153 upgrades for Mocha, Latte, and Macchiato, including new features such as talk-while-execution, red light cou...[Details]
With the rapid development of new energy vehicles, the number of charging piles is also increasing day by day, and the importance of charging infrastructure construction is becoming inc...[Details]
On June 15, 2019, the 2019 International "5G & Semiconductor" Industry Summit was grandly held at the Shenzhen Convention and Exhibition Center. As China's core IoT security chip manufacturer, Nation...[Details]
Many aircraft in my country have used PAL displays similar to color TVs. When the display resolution requirements are not very strict, these devices can be used as display terminals for onboard comp...[Details]
System functions Use 74LS164 to expand the AVR's serial port output to parallel port output. hardware design Schematic diagram of the control circuit of the serial output expansion chip 74LS164 p...[Details]
7 precautions for using liquid flow meters
1. For liquid level meters that exceed a certain length (ordinary type > 3 meters, anti-corrosion type > 2 meters).
2. The installation position of...[Details]
If the gain or noise bandwidth of a low-noise amplifier is known or estimated , the other specifications can be measured using only a few resistors and an AC voltmeter. This example uses the Johnson ...[Details]
Today’s cars are computers on wheels, with multiple systems constantly communicating with each other to provide intelligence that keeps drivers and passengers safe, comfortable, and entertained whi...[Details]
RF/Wirelessly
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