China Wireless modem Manufacturers, Serial server Factory https://blog.dnevnik.hr/zigbeemodule
ponedjeljak, 26.12.2022.
Industrial serial server can control other serial ports and network-connected devices
Industrial Serial ServerIndustrial serial server can control other serial ports and network-connected devices, and can access the system console of network devices to monitor and control their functions.
Industrial SwitchThe industrial switch can control PCs and servers, and can only switch between connected network devices.
different functions
[Industrial serial server] The role of the industrial serial server is to realize the networking equipment from the serial port to the Ethernet, which can transmit data between the Ethernet LAN and the serial port (COM port) of the computer or device. sx1276 lora module The main purpose is to allow serial devices such as printers, scanners, or climate control systems to be used on a network without relying on a computer's serial port for the connection. This way, any serial device can be connected to the network and accessed from anywhere, including the internet.
Industrial switchIndustrial switch is also called industrial Ethernet switch, which is suitable for server control in the same room or around the world. Its main function is to expand network signal equipment, and it is an Ethernet switching device for industrial control. bluetooth module nrf52832 Because of the adoption of network standards, it is open, widely used, and cheap. It uses transparent and unified TCP/IP agreement. Networking has become the main communication standard in the field of industrial control.
petak, 16.12.2022.
Hotel circuit intelligent control scheme, saving time, effort and cost!
The hotel industry has a long history of development, and hotels are constantly evolving. With the development of modern Internet of Things technology, the services of the hotel industry are also iterating and becoming more "smart": automatic light control, automatic curtains, temperature and humidity Flexible services such as control bring more warm enjoyment to each guest.
In fact, many hotels still use traditional circuit control methods, such as some traditional key switches, circuit breakers, etc. These methods have some disadvantages in the era of intelligence:
1. The operation is troublesome, and the customer needs to be close to the operationbluetooth low energy module
2. The circuit wiring is cumbersome and the distribution of lines varies
3. Electrical appliances cannot form a centralized management system
4. Unable to monitor power consumption and avoid waste of power
Optimization method100 meter bluetooth module
The gateway is used to remotely intelligently control the circuit switches of hotel facilities (take the Ebyte E870 series as an example), realize the operation of electrical equipment on the cloud, and accelerate the construction of hotel informatization, which can reduce the management cost of managers and improve management effects. It can also bring customers more intimate service.
petak, 09.12.2022.
4G wireless smart meter reading, more than a little easier
With the development of the Internet of Things, people's lifestyles are changing subtly, and work and life are gradually shifting from traditional offline to online. More and more companies are also adopting offline and online management models to improve their business Viability and competitiveness,Industrial Router/Gateway meter reading is no exception.
In daily property management, meter reading is a tedious task, and the traditional meter reading mode has many disadvantages:
1. Manual meter reading is troublesome and error-prone
2. Dispersion distance is long and time-consuming
3. The efficiency is too low and the labor cost is too high
Aiming at the defects of the traditional meter reading method, the 4G wireless smart meter reading system came into being. Based on the 4G communication technology of the three major operators, it has the advantages of fast transmission speed, low communication cost, Single serial port server convenient installation and low cost, no need for additional wiring, and stability. Strong, not limited by distance and many other advantages, the use of 4G wireless meter reading solution can effectively reduce labor costs and improve the accuracy of data statistics.
Traditional meter reading
4G wireless smart meter reading
Oznake: Single serial port server
srijeda, 30.11.2022.
Four defects of LoRaWAN wireless technology
Although the LoRaWAN wireless technology was built by the experts of LoRa Alliance (mainly Semtech, IBM, Actility), it ignores the complexity of technology and the high cost of hardware, and has defects in the following technical transmission.
1. Public bandwidth + public standards = vulnerable to attacks industrial iot gateway
LoRaWAN works on the free bandwidth of ISM (ISM), whose protocol specification is public, which brings the problem of being vulnerable to attack. It is difficult to "forge" an End Node. The attacker listens to the 4-byte DevAddr. When using this address to send a message, the gateway is a network server (NS of one of the four servers of Lora wan server).
Another attack is "malicious crowding". Imagine that if an attacker uses a LoRa device to send a preamble of the maximum length with a bandwidth of 125kHz, the channel will be maliciously occupied. As long as the attacker protects the duty cycle and transmission power, this attack is "legal". Policies or industry regulations may be needed to protect LoRaWAN from congestion attacks.
2. The inefficiency of the asynchronous ALOHA protocol
The state of Hawaii in the United States is an archipelago, and the cost of laying a wired network is very high. Using wireless technology allows users on each island to use the central computer. This project was in charge of by the University of Hawaii in 1968, and it is the earliest wireless computer communication network in the world. This communication protocol is called aloha, which is the greeting that people in Hawaii say hello to.
The principle of the protocol is very simple. If the user has data, let him send it. If the response is received within the specified time, it means the sending is successful, otherwise resend.
Resend strategy: Wait for a random time before resending. If a collision occurs again, wait a random amount of time until the resend succeeds.
Pros: Easy to implement.
Disadvantages: extremely easy to conflict
Efficiency: The maximum channel utilization rate of pure ALOHA protocol is below 18.4% (1/2e)
Today, the host Class A of LoRaWAN also adopts the ALOHA protocol. While saving power and simplicity, conflicts and low efficiency are inevitable. Fortunately, the sensor's communication data and frequency are not high, and SX1301 can provide multi-channel FDMA (Frequency Division Multiplexing), which can effectively alleviate conflicts.
ponedjeljak, 07.11.2022.
Long Range: Over 1Km distance via BLE
Long Range: Over 1Km distance via BLE
In previous timings, radio transmit power played a crucial role in increasing the range of BLE products. With the introduction of Bluetooth modules based on Nordic solutions, users are able to obtain better communication protocols. This module supports BLE 4.2/5 protocol. Bluetooth version 5 provides long-range mode. The design of this long-range wireless module provides considerable power efficiency while achieving a coverage range of over 1Km.
In these devices, Wi-Fi and Bluetooth communicate through serial ports for transparent data transfer. The long-range module helps extend the range of the Bluetooth connection to experience enhanced positioning; it also enables robust communication in areas modbus tcp gateway
where users encounter obstacles with previous wireless devices. In addition, Long Range also supports transparent signaling.
Achieving a range of more than 1 Km via BLE depends on the surrounding environment, antenna and radio signal performance. Therefore, there are many factors that can affect the working of Bluetooth range. Typically, they are:
`Antenna
a Physical obstacles in the data transmission path
b Receiver sensitivity
cTransmitter output power
BLE technology itself has limitations based on the use of modulation. Since the performance of the antenna and radio remains fairly static for a particular Bluetooth device, the surrounding environment varies widely. For example: people may get a range of up to 100 meters outdoors, which is a rare situation. In indoor Bluetooth positioning and navigation, obstacles such as concrete walls can reduce the strength of the radio signal. Therefore, the effective range is significantly reduced.
When creating a Bluetooth device, a manufacturer can choose to give it a better range. They can also move on by choosing the Bluetooth chip with the best receiver sensitivity. In addition, its output power should ensure that the device has a good antenna. But in some cases, users need to transmit data over hundreds and thousands of meters via Bluetooth technology. In this case, they use a different network to achieve a higher range of the bluetooth module.
petak, 04.11.2022.
Ebyte Cloud Platform - Construction of Smart Farm
With the popularization of IoT technology, various IoT application cases can be seen everywhere in our lives unconsciously. Such as shared bicycles neatly parked on the roadside, shared mopeds, smart sockets and smart appliances in the home; smart irrigation systems in agriculture; smart parking systems in cities are all classic cases of IoT applications. It is foreseeable that the emergence and implementation of a large number of high-quality IoT solutions in the near future will bring a better experience and more convenience to our lives.
In this article, we build a smart farm application scheme based on the Ebyte cloud platform and E870-D1G as the network IO controller.
First of all, we need to clarify what is a "smart farm": it is a kind of Internet of Things as the core foundation, through the materialization of various functional parts in the farm, combined with wireless technology, automatic control technology and database to achieve intelligent management farm.Remote IO module
The development of smart farms is mainly divided into three stages:
1. Traditional labor or manpower liberation, AC-DC dual no need to enter the farm, only manpower is required for remote control on the console;
2. The farm is controlled by the host computer system, and the manager can directly control the host computer to complete all farm operations, and the host computer issues all control instructions;
3. Artificial intelligence is highly intelligent, and all operations do not need personnel to make decisions, and are all scheduled by unmanned systems.
srijeda, 26.10.2022.
Cellular standards can directly impact the performance
Cellular standards can directly impact the performance, range, ease of development, security, reliability, and implementation cost of scaling IoT in manufacturing. Traditional SIM cards used in cellular IoT devices are limited to a single network operator. They require technicians to manually insert/replace SIM cards, which can lead to deployment bottlenecks, especially in remote areas. These challenges are addressed by newer eSIM platforms that contain a non-removable chip that can download carrier profiles over the air and allow multiple telecom providers to be pre-programmed so devices can choose the best connection.
An IoT device with an eSIM comes with a SIM card and cellular module. These devices offer the flexibility to deploy anywhere in the world and ensure reliable connectivity as they can change carriers without human intervention. These devices benefit machines that monitor complex and hard-to-reach locations and help avoid logistical challenges during movement. All these features contribute to faster scalability of IoT applications.
industrial iot gateway
The benefits of cellular IoT connectivity
Cellular connectivity is becoming increasingly popular for enabling integrated machine-to-machine communications, enabling wireless condition monitoring of industrial assets. This is because cellular IoT connections provide high network reliability. The high data rates (10-100Gbps) at which cellular IoT devices transmit data are not affected by severe weather conditions, and the distance between the base station and the device is much less affected than many other wireless communication options. This is important because cellular connections have the best coverage and ability to avoid overload problems. It also provides greater freedom of movement, helping to gain connectivity even in complex environments where devices are not fixed.
Oznake: serial to wifi converter
nedjelja, 09.10.2022.
Detailed explanation of inverter structure classification and working principle
In our daily life, we often go to places outside the scope of the mains supply. When we want to use some household electronic devices in such places, we will find that our common energy storage devices, such as batteries, etc. , can only provide direct current, and the voltage is usually lower. CAN2.0 Communication Module Therefore, if there is a device that can convert low-voltage direct current into 220V alternating current, it will greatly facilitate our life, and the inverter came into being.
1. Classification
Inverter classification
1. Single-phase inverter
The number of output voltage (current) phases is single-phase, and the frequency is 50HZ or 60HZ. This type of transformer is often used in low load conditions and is less efficient than a three-phase inverter.
2. Three-phase inverter
The number of output voltage (current) phases is three-phase, and the frequency is 50HZ or 60HZ. The three waveforms at the output are the same but 120° out of phase. It can be considered as the output of three single-phase inverters, and the node where the three terminals are connected is the central node.
3. Current Source Inverter
The DC side is a current source, its DC power source has high impedance, and the supplied current is rigid and is less affected by load changes. The output current state of the AC side depends on the switch tube in the inverter.
4. Voltage Source Inverter
The DC side is a voltage source, and its DC source impedance is zero, which is a rigid voltage source. Its AC side output voltage state depends on the switch tube in the inverter.
5. Bridge inverter
Divided into half-bridge, full-bridge and three-phase bridge inverters. Its main structure is based on a half-bridge composed of switching transistors (MOSFET, IGBT, thyristor, etc.).
6. Parallel inverters
A parallel inverter consists of a pair of thyristors, a capacitor (C), a center-tapped transformer (T) and an inductor (L).
7. Series Inverter
A series inverter consists of a pair of thyristors, a resistor (R), an inductor (L) and a capacitor (C).
8. Square wave inverter
The AC waveform at the output end is a square wave.
9. Quasi-sinusoidal inverter
The waveform of the output terminal is an inverter with a stepped square wave, and its waveform is close to a sine wave, which is simpler than a sine wave but more difficult than a square wave.
10. Sine inverter
The output waveform is almost sinusoidal, and the waveform is smoother than the quasi-sine wave.
utorak, 27.09.2022.
Wireless sensor network products are mainly used in the following fields in the monitoring market
1. Industrial environmental monitoring
The monitoring scope of the industrial environment has involved all aspects of the entire ecological environment, including daily environmental monitoring, such as atmospheric, water, electromagnetic radiation and radioactive monitoring; there are also some special regional environmental monitoring, such as deserts, mountains and the presence of radioactive sources. monitoring in other areas. These environments place high demands on the flexibility, reliability and safety of sensor products.Wireless serial lora module
Wireless sensor network products can break through traditional monitoring methods, while satisfying flexibility, reliability and security, reducing costs for industrial environment monitoring, and greatly reducing the tedious process of traditional monitoring, making it easier for random monitoring. Access to research data is facilitated. As people pay more and more attention to the industrial environment and need to collect more and more environmental data, the demand for wireless sensor network products will gradually expand.
2. Smart grid
At present, global energy, environment, climate change and other issues are becoming increasingly prominent, and countries around the world have taken the development and utilization of clean energy as the focus of energy development and transformation. Smart grid has now become one of the important applications of Internet of Things technology, and it is also an inevitable trend of power grid development. Smart grid ensures the safety, reliability and economy of power supply through the application of advanced sensing and measurement technology, communication technology, advanced control methods and decision support system technology. In order to make the smart grid continue to operate, equipment security has become a key issue. Because power grid equipment has been in high voltage, high current and other working conditions for a long time, and at the same time faces the threat of extreme natural environment such as thunderstorms, it is particularly important to implement intelligent monitoring of equipment. Wireless sensor network products can remotely monitor the power grid equipment, understand the working status of the equipment, and transmit the data to the control center to manage the equipment in a unified manner. At the same time, real-time monitoring also improves the maintenance efficiency. With the advancement of the smart grid plan, the demand for intelligent monitoring of grid equipment has formed a huge market for wireless sensor network products.UART module
3. Digital oilfield
The continuous expansion of economic development and social demand has accelerated the rapid increase in the number of oil wells, and the overall scope of oilfield development is also expanding. Therefore, the intelligentization of oilfield production, management and operation has become a development trend, and digital oilfields have emerged as the times require.
In the process of oilfield digitization, wireless sensor network products can realize real-time monitoring of the oil well environment and wellhead equipment, transmit important information such as equipment status and environmental parameters at the work site to the control center, and immediately issue alarms and arrange scheduling when necessary. With the in-depth promotion and extensive demonstration of wireless sensor network products in oil fields, the number of digital oil fields will gradually increase, and the market demand for wireless sensor network products will show a trend of rapid growth.
4. Smart Industry
my country's industrial manufacturing industry is facing the opportunity of a new round of industrial revolution. The need for manufacturing enterprises to use the Internet of Things technology to transform and upgrade is very urgent. Information technology enterprises are also actively using the Internet of Things technology as a breakthrough to penetrate into the industrial field rapidly. The proposal of Industry 4.0 with intelligence as the core is in line with the trend of the integration of Internet of Things technology into the industrial field, and the future market development potential is huge. One of the cores in smart manufacturing is the intelligent monitoring of industrial processes.
The application of wireless sensor network technology to intelligent monitoring will help to optimize the industrial production process, and at the same time, it can improve the ability and level of production line process detection, real-time parameter collection, production equipment monitoring, and material consumption monitoring, making the production process intelligent. The level of monitoring, intelligent control, intelligent diagnosis, intelligent decision-making and intelligent maintenance has been continuously improved. With the rapid development of the Internet of Things and the further advancement of Industry 4.0, industrial process control with intelligence as the core will develop rapidly, which will drive the market demand for industrial process monitoring system solutions based on wireless sensor network technology.
The main reason for the rapid growth of industrial wireless sensor network products is that with the maturity of the entire Internet of Things ecological environment, the industrial Internet of Things has also been slowly developed by the government. The number of industrial sensing terminals in China maintains a trend of rapid growth. In 2014, the number of industrial sensing terminals in China was about 700 million. It is expected that with the implementation of Made in China 2025, by 2020, China's industrial sensing terminals will exceed 2 billion. .
At the same time, developments in wireless communication, power consumption, extreme miniaturization (one of the driving forces being MEMS sensors), and embedded computing have contributed to the rise of wireless sensor networks for harsh industrial environments. Industrial wireless sensor network products will grow rapidly until 2019 with the transformation of enterprise production lines and IT equipment upgrades driven by the proposal of "Made in China 2025", and have maintained an upward trend.
srijeda, 21.09.2022.
4G remote control aerator, smart farming and fishing is easier!
With the development of my country's aquaculture industry, the aquaculture system is actively promoting the supply-side structural reform. The fishery economy is developing steadily and making progress, the industry is greener, and its benefits are red. GPRS Module my country will continue to implement the aquatic ecological healthy breeding system, give full play to the ecological service function of the aquaculture industry, and vigorously develop high-quality, characteristic, green and ecological aquatic products.
Aerator
The aerator is a machine used in aquaculture. Its function is to increase the oxygen content in the water to ensure that the fish cultured in the water will not be deficient in oxygen, and at the same time, it can also inhibit the reproduction of anaerobic bacteria in the water and play a role in sterilization.
The aerator generally relies on its own air pump to inject air into the water to achieve the purpose of increasing the oxygen content in the water, further improving the fishery breeding environment, and promoting the maximization of the income of fishery farmers.
1. The function of aerator
In aquaculture, proper use of aerators is critical. Correct use of aerators can bring high output and high benefits. Combined with remote control, a smart agriculture and fishery IoT solution can be realized.
Oxygenator action
Oxygenation effect:
Oxygenation
The main function of the aerator is to increase the amount of dissolved oxygen in the water and promote the dissolution of oxygen in the air into the water.
Stir water
When the aerator is running, it drives the water to turn over, forming a water wave or water flow, to achieve the purpose of stirring the water, and promote the temperature and dissolved oxygen in the water to balance.
mix
During the high and low temperature seasons in summer, the oxygen aerator mixes the upper and lower layers of the water with saturated oxygen-dissolved water, and promotes the uniform mixing of the upper and lower layers in the water in a short time, thereby increasing the dissolved oxygen in the water.
Aeration
Under the action of stirring water, it accelerates the overflow and release of harmful gases (such as ammonia, methane, etc.) in the water, reduces the content of some harmful substances in the water, and realizes the effect of purifying water quality.
Smart farming and fishing
1. Pain points of using aerators
How to use the aerator correctly?
Instructions
Pain points:
difficulty
2. Remote automatic control aerator solution
Using 4G network remote control, through mobile phone APP control, the 4G cloud transmits control commands to the 4G remote remote control switch, and the remote control switch output port realizes the on and off functions (replacing traditional contact button switches, knifes, circuit breakers, etc.). Control large and small power motors, and can easily realize remote control functions through different specifications of contactors.
4G mobile phone cloud intelligent remote control switch, simple operation and high efficiency
It can realize remote control, support timing and countdown functions, and no need for manual duty.
Remote control vs manual
It can not only realize remote control, but also realize automatic control, realize automatic control of aerators according to seasons, weather conditions, time periods, etc., and liberate productivity.
3. Advantages of the program
Cost advantage
Low installation cost and low maintenance cost
System advantage
4G network
remote control
Engineering advantage
Simple installation, simple maintenance, easy to use
Benefit advantage
Fast response, high efficiency, automation
4. Product Features
4G smart remote control switch
Product advantages
ÏMobile APP remote control
ÏRemote switch (not limited by distance)
ÏSet up in one minute (easy and fast)
ÏFast response, low latency (4G network)
ÏNo WiFi required, as long as there is a 4G signal, it can be used
ÏMore stable (Alibaba cloud platform)
ÏLifetime free use (bring your own traffic card, no need to recharge)
ÏMultiple control modes (self-locking/jogging/interlocking)
ÏSupport sharing (to achieve multi-person management control, one of the main management accounts)
ÏAutomatic control, no need to be on duty (timer function)
ÏReliable, no crash (multi-level protection)
ÏSupport 2-way input, 2-way output
ÏSupport to control all kinds of equipment, both large and small power can be controlled (more than 700 watts power, need to use external contactor)
ÏAutomation control (automatic control can be set according to weather, time, external conditions)
ÏSupport rail installation (flexible installation method)
ÏFlame-retardant plastic shell, small volume
Oznake: GPRS Module
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Chengdu Ebyte Electronic Technology Co.,Ltd.is a high-tech enterprise which specializes in Internet of Things communications, has hundreds of self-developed products and unanimously recognized by customers. Our company has a strong R&D capabilities, with a perfect after-sale system, we provide customers with complete solutions and technical support,shorten the R&D cycle, reduce R&D costs, and provide a powerful platform for new products development.