Of course, if it is at a close distance and requires ms-level rapid temperature measurement, the wired method is also a good choice. By integrating the respective technical characteristics of LORA\GPRS\WIFI\Ethernet, we have launched a variety of hybrid wireless temperature measurement solutions.

For scenarios with complex environments and scattered temperature measurement points, the advantages of wireless temperature measurement are particularly prominent.

When there are many temperature measuring devices, if the batteries need to be replaced frequently or charged frequently, it will definitely bring you new troubles. Therefore, only by designing a solution to replace the batteries every few years can the advantages of wireless be truly highlighted.

Among them, the NT78 collector removes the display function just to save power, make the battery more durable, and the summary display is easier to observe and manage. Maybe you want to use a fixed power supply to achieve once and for all, then what is the difference between wireless temperature measurement and wired temperature measurement at this time?

Wireless means getting rid of power cords and data lines, which is also the root of our insistence on battery power supply.

The NT78 series uses the LORA communication protocol, which is characterized by strong anti-interference performance in spread spectrum communication. It is especially suitable for application scenarios where temperature measurement points are dispersed in buildings and other buildings. The current when transmitting data is about 120mA, the time of a single data transmission is about 700ms, and the sleep current is 1.8uA. For slow-paced temperature measurement applications, the NT78 series achieves a balance between long transmission distance and battery durability, thus overcoming the problems of troublesome wiring for wired temperature measurement and high installation costs.

Question: Will your gateway integrate the three functions of GPRS, network port and WIFI at the same time?

Answer: Hello, we don't design like this at the moment. This design cannot be the most cost-effective. We are not making computers, we are making the most cost-effective products, so our product introductions will be introduced separately. This may confuse you, but our strategy is to focus on technical support in the early stage and price support in the later stage. If we make a three-in-one gateway, we will not be able to achieve the best price.

Question: Did you read this all on the website? Don't have a dedicated APP?

Answer: Our design adopts the latest mainstream WBE APP. The biggest advantage is that it is not limited by the version of the mobile phone system. Secondly, the computer and mobile terminals can be displayed simultaneously without the need to develop multiple sets of software. Nowadays, games are all web games and micro-clients, instead of focusing on traditional heavy clients. How to add shortcuts to web pages on mobile phones to the desktop is as follows:

Question: Does the device contain battery information?

Answer: The maximum power value is 6 and the minimum is 1, and the current power value cannot be measured accurately, because the current power value is the voltage value detected before launching, and the current power battery is used. After transmitting once, the voltage will return to the maximum value after a few minutes. If the battery is charged during or after launch, There will be a voltage drop, and the voltage can be measured, but because it is a low-power design, to save the power value, it must be stored in the EEPROM. Such an operation will cause the device to break easily after 100,000 times. Because the EEPROM can only read and write 100,000 times, the estimated battery time is currently used.

Question: Can the alarm range of a single monitoring point be set?

Answer: Hello, currently it is necessary to use an audible and visual alarm to alarm. One alarm can correspond to multiple temperature sensors. The general operation process is as follows. Preset the alarm for each sensor. The alarm is also a receiver. Each time it receives data from a sensor, it will judge. When the data uploaded by the temperature sensor exceeds the preset range, it will alarm immediately. At this time, the user can check the display gateway or mobile phone or computer to find out which device is abnormal. Of course, in theory, you can correspond to one alarm for every sensor, but that is not cost-effective.

The alarm parameter setting method is as follows:

Temperature alarm setting method demonstration video: https://v.youku.com/v_show/id_XNDYxOTU5ODAwNA==.html  

At present, there is no open remote alarm via email, text message, or voice. Considering that text messages, phone calls, etc. involve cost issues, they are not open yet. We will open them after we have designed a reasonable charging and recharging mechanism.

Question: How much does a battery cost approximately?

Answer: The battery model is ER18505M. Users can buy it by themselves or purchase it from us. The unit price is 15RMB each, excluding tax. If the user buys it by himself, pay attention to the plug of the battery and show it to the seller. They will pair you with the corresponding battery. So everyone should be rational when deciding the speed of data last time1 For example, if a question is updated every 3 minutes, then it will be 480 times a day. Of course, faster updates are definitely the best, but comprehensively considering the battery, etc., and setting the temperature update cycle reasonably, the battery will be durable, which not only saves money, but also saves worry. If you have hundreds of devices, it is unreasonable for you to have to replace the battery frequently.

Question: Are there sensors for light, PM2.5, CO2 concentration, etc.?

Answer: Hello, we all make this kind of product, but there is no main promotion, and we keep it at the bottom of the box. This is also because sensors such as PM2.5 COM2 are very expensive. Secondly, this type of sensor cannot be battery powered. This goes against the core value of wireless and wiring-free.

Q: Cloud platform data recording?

Answer: Hello, the data is stored in the cloud for free. The advantage is that you can observe and record at the same time without delay, unlike traditional stand-alone recorders that need to be exported before you can see the data. This is one of the substantial advantages of online temperature measurement, and the data can be exported. We will provide a dedicated data export software, and there are multiple data export methods. It is better to export data from multiple devices at the same time, or export data at a single point. The maximum amount of data exported each time is 6,000. Historical curves can be automatically produced on the cloud platform, and users can export EXCEL and make curve distinctions by themselves.

Q: What is the main difference between the 78 series and the 59 series?

Answer: The 78 series uses LORA spread spectrum communication technology, and the 59 series uses FSK radio frequency technology. They both use the free ISM 433MHZ frequency band (adjustable between 410~450MHZ). It can be easily understood that the 78 series has a longer distance, but the power consumption is also greater. From a technical level, it can be easily understood that the 78 series uses spread spectrum technology, which means that one data transmission is equivalent to The 59 series sends data 10 times, so it consumes a lot of power. From a popular point of view, it is like two people shooting 3-pointers. 59 is only allowed to shoot once, and 78 is allowed to shoot 10 times. The hit rate is naturally higher in 78, which is reflected in the long distance in communication. However, the power consumption of wireless temperature measurement is mainly consumed in radio transmission, so the 78 series has higher power consumption than the 59 series. However, the receiving sensitivity of the 78 series is also higher, which is suitable for complex environments such as buildings. Of course, the transmission characteristics of the 59 series are also far better than WIFI and Bluetooth. It can also transmit through walls, but it is worse than the 78 series. If the temperature update is not required to be too fast, it is recommended to choose the 78 series. If the temperature update is not required to be faster, it is recommended to use the 59 series.

Q: Wireless temperature sensor, gateway, concentrator, alarm, cloud platform?

Answer:

Wireless temperature sensors are temperature measurement transmitting devices. They are divided into 4 categories according to different temperature ranges. NT series recommends -30~120°C, PT series ha recommends: -100~200°C, KT series recommends: 0~1350°C, HT series: temperature and humidity are measured in the same way, and are divided according to different communication distances. 59 series and 78 series, the 78 series has a longer distance, but the power consumption is also greater. If the data is sent once every 5 minutes, the 59 series battery can be used for about 10 years, while the 78 series battery can be used for about 2 years. The 59 series is tested on the road at a distance of about 300 meters, while the 78 series can be tested at a distance of more than 500 meters.

Concentrators, alarms, and gateways are all temperature receiving devices;

The concentrator adopts standard MODBU-RTU protocol and RS485 interface, which is mainly suitable for engineering application personnel. It can generally be flexibly integrated with other RS485 devices for system integration. If the concentrator needs to implement an upload server, it can add serial port server equipment such as DTU to achieve this.

The gateway adopts HTTP protocol, JSON data format, and adopts POST output upload mode. The gateway is divided into 4 versions: 2G, 4G, WIFI, and Ethernet. If you want to facilitate on-site observation, you can choose a visual gateway. The gateway mainly implements data aggregation and uploads it to the server, allowing mobile phones and remote computers to observe data.

Basic workflow: The temperature sensor measures the temperature regularly and wirelessly transmits the data to the gateway. The gateway receives the data and then transmits it to the cloud platform regularly. After logging in to the cloud platform with a mobile phone or computer, real-time temperature information and historical curves can be obtained.

If the user can build his own cloud platform, the data can be transferred directly to the user platform, as long as the IP address is set correctly. If they cannot build their own cloud platform, they can use our cloud service, which will be continuously upgraded and updated for free.

The alarm is also a receiver and can be used independently. The alarm will judge after receiving the data from each wireless temperature sensor. If it exceeds the preset threshold, it will alarm immediately. The thresholds for different temperatures can be different. The normal process is that when the alarm alarms, the staff will check the mobile phone.

Or use the information on the gateway display to troubleshoot the device. When normal, the display shows white fonts. When the temperature exceeds the threshold, it will also display red fonts.

Question: How to choose a wireless temperature gateway? What are the differences and characteristics of each?

Answer: We divide gateways into three types: GPRS (2G or 4G), WIFI and Ethernet. Since the domestic mobile phone network is very complete, it is not suitable for GPRS gateways except in basements, deep mountains and old forests, and other scenarios without mobile phone signals. In other scenarios, GPRS gateway is the most convenient and flexible, and it can be used immediately after power-on and through adjustment. The location of the entire gateway can flexibly build a wireless temperature measurement network, and we provide a 3-year traffic card for free. Since our model only requires a traffic card for the GPRS gateway, the cost is very low. It will only cost 10 yuan @ year after 3 years, and we will remind you one month in advance and help you complete the recharge.

WIFI gateway is suitable for scenarios with good WIFI signal coverage. It needs to be used after setting up a WIFI account and password.

Ethernet gateways are suitable for scenarios with complete local area network layouts, such as hospitals and modern factories. If temporary network cables are required, it is not recommended to use Ethernet gateways.

Question: What are the concepts of UID, ID, group number, number, and channel?

Answer:

Wireless temperature sensor: It is a temperature transmitting device. Each temperature measurement device has a number. The ID, group number, number, channel and other parameters can be flexibly set.

Wireless receiver: It is a temperature receiving device, equivalent to a class, and the wireless temperature sensor is equivalent to a student in a class.

UID: equivalent to the student's name. There cannot be devices with the same UID under the same gateway.

Group number: equivalent to the student's class number (1-255 can be set), the group number under the same gateway must be the same

Number: equivalent to the student's class ID (1-255 can be set), and the ID under the same gateway cannot be repeated.

Channel: It is equivalent to the language of the student. Different channels are equivalent to different voices. Communication cannot be done without using the same frequency.

Clever use of group number, channel and other parameters can be used for more complex multi-channel temperature measurement communication (dozens of hundreds of channels), because when there are many temperature measurement devices, they will interfere with each other. In turn, setting different channels and group numbers can avoid and reduce interference.

Q: Wireless temperature sensor, gateway, cloud platform?

Answer: The temperature sensor measures the temperature regularly and wirelessly transmits the data to the gateway. The gateway receives the data and then transmits it to the cloud platform regularly. After logging in to the cloud platform with a mobile phone or computer, the display temperature and historical curves will be refreshed regularly.

Question: Set the upload cycle of the wireless temperature collector reasonably?

Answer: The upload cycle of the wireless temperature collector can be set flexibly. The recommended setting range is 10~65535S. Reasonable setting of the upload cycle directly affects the service life of the battery. Because 95% of the power consumption of the device is mainly caused by damage during wireless transmission.

To choose the upload period reasonably, you must first clarify the total time of your temperature measurement, whether it is days, months or years. Combined with the upload period, you can get the temperature sampling rate. In fact, the size of the sampling rate is the key point.

The following takes the NT59/HT59/PT59/KT59 series as an example, under the parameter conditions of airspeed 10kbps and maximum transmit power.

The upload cycle is 10 seconds, then the sampling rate is 360 times @ hour, 4320 times @ day, 129,600 times @ month, 3.1104 million times @ year. The corresponding battery life is about 240 days. It is recommended that one host be associated with 2~3 wireless temperature collectors

The upload cycle is 60 seconds, then the sampling rate is 60 times @ hour, 1440 times @ day, 43,200 times @ month, 518,400 times @ year. The corresponding battery life is about 2 years. It is recommended that a host be associated with 5~10 wireless temperature collectors

The upload cycle is 180 seconds, then the sampling rate is 20 times @ hour, 480 times @ day, 14,400 times @ month, 172,800 times @ year. The corresponding battery life is more than 3 years. It is recommended that a host be associated with 10~20 wireless temperature collectors

The upload cycle is 300 seconds, then the sampling rate is 12 times @ hour, 288 times @ day, 08,640 times @ month, 103,680 times @ year. The corresponding battery life is more than 5 years. It is recommended that one host be associated with 20~30 wireless temperature collectors.

The following takes the NT78/HT78/PT78/KT78 series as an example, under the parameter conditions of a spreading factor of 11 and maximum transmit power.

The upload cycle is 10 seconds, then the sampling rate is 360 times @ hour, 4320 times @ day, 129,600 times @ month, 3.1104 million times @ year. The corresponding battery life is about 30 days. It is recommended that one host be associated with 2~3 wireless temperature collectors

The upload cycle is 60 seconds, then the sampling rate is 60 times @ hour, 1440 times @ day, 43,200 times @ month, 518,400 times @ year. The corresponding battery life is about 0.5 years. It is recommended that one host be associated with 5 to 10 wireless temperature collectors

The upload cycle is 180 seconds, then the sampling rate is 20 times @ hour, 480 times @ day, 14,400 times @ month, 172,800 times @ year. The corresponding battery life is about 1.5 years. It is recommended that a host be associated with 10~20 wireless temperature collectors

The upload cycle is 300 seconds, then the sampling rate is 12 times @ hour, 288 times @ day, 08,640 times @ month, 103,680 times @ year. The corresponding battery life is more than 2 years. It is recommended that one host be associated with 20~30 wireless temperature collectors

According to the above statistics, the upload cycle is directly related to the durability of the battery, the number of devices associated with the host, etc., and indirectly related to the cost of the system. Therefore, users should determine the upload cycle based on actual needs.

Question 1: What are the common wireless devices?

Answer 1:

Infrared is suitable for short-range communication, and the transmission has a certain angle and directionality, such as remote controls related to home electronic products.

Bluetooth requires pairing to establish communication, and the communication distance is short. It is generally used for data interaction between civilian smart devices, such as Bluetooth headsets.

WIFI requires an account and password to establish a connection. It has the largest data transmission throughput and focuses on Internet data interaction, but the wall transmission effect is not good.

Zigbee belongs to the 2.4Ghz category. IC manufacturers such as TI lead the promotion of Zigbee protocol chips, which mainly solve wireless sensor network applications. However, the transmission effect through walls is not good, so it is suitable for small-scale device networking, such as smart home applications.

1GHZ, no standard protocol, equipment manufacturer's customized private protocol, characterized by good partition transmission effect, very suitable for complex data collection in factories and other environments, among which the 1GHZ typical frequency bands are 433MHZ, 868MHZ, 915MHZ, and the 59 series belongs to this category

GPRS, mobile cellular communication network, is the best choice for mobile device networking communications. It is characterized by strong concurrency in big data communication. In addition, 4G is faster than 2G/3G network data transmission. NB is a simplified version of the GPRS protocol.

Lora, is characterized by strong anti-interference performance in spread spectrum communication. It also belongs to the 1Ghz radio frequency communication category. The 78 series belongs to LORA

Radar is mainly used for military information countermeasures

Question 2: Why is the temperature collector designed for 433MHZ wireless communication?

Answer 2: 433MHZ is much better than 2.4GHZ wireless wall transmission. 433MHZ is a free frequency band in Asia. It takes less than 1ms to establish sending and receiving communication. It enters sleep state after regularly transmitting data, making the overall power consumption extremely low. 433MHZ is more suitable for industrial scenes and wireless sensor networks, while 2.4GHZ wireless is more suitable for civilian consumer electronics, such as WIFI, Bluetooth, and ZIGBEE, which are mainly used for smart home devices, etc.

Question 3: Why is the temperature collector not designed for direct WiFi transmission?

Answer 3: The WIFI wall transmission effect is not good; and it takes more than 3 seconds from sleep to re-establishing the connection, so the overall power consumption is not far lower than that of 1GHZ wireless. WIFI requires a pre-set password to establish a connection. When there are many temperature measurement points, it is very cumbersome to set a password for each one.

; The biggest advantage of WIFI technology is that it has a large speed graph and has a certain concurrency mechanism. In response to the needs of some intensive temperature measurement and testing industries, we provide a WIFI + microprocessor + sensor solution to solve the needs of multi-channel rapid temperature measurement applications with high real-time requirements.

Question 4: Why are the temperature measurement points not designed for direct GPRS transmission?

Answer 4: The peak current of GPRS transmission is as high as about 1A. Common batteries cannot achieve long-term standby. It is neither economical nor miniaturized to use ultra-large-capacity batteries. GPRS modules based on 2G networks are relatively cheap, but when the connection with the base station fails and is restarted, The time is about 20S. Although the restart connection time is within 5 seconds using the 4G module, the 4G module is too expensive. If each temperature measurement point uses a 4G module, the price/performance ratio is too poor, and each temperature measurement point is equipped with an IoT card. When there are many temperature measurement points, the traffic cost of the big data system will be The cost will be high, and traffic fees need to be incurred every year, and the IoT card has many follow-up fees and other issues that are difficult to manage. The 1GHZ wireless summary data is sent to the gateway and then uploaded to the server through GPRS, which not only reduces the cost, but also improves the real-time performance of the system. The temperature measurement point can also be used without changing the battery all year round.

Note: If designed as a GPRS temperature measurement collector, it is mainly suitable for mobile temperature measurement applications such as cold chain vehicles, such as network monitoring of medical incubators. Such applications have fewer temperature measurement points and are installed on mobile carriers.

Question 5: Why should we open parameter settings?

Answer 5: Wireless uses electromagnetic wave transmission. The prerequisite for establishing communication is that the frequency and other parameters must be consistent, and only one-to-one communication can be performed at the same time. Actual applications are often multi-point communications, so by setting different channels and other parameters, multiple wireless temperature measurement systems can coexist. Application requirements; and different application scenarios have different real-time performance of wireless temperature measurement and the number of temperature measurements, so we need to open parameters to fully adapt to the needs of different users.

Question 6: Why provide a protocol data interface?

Answer 6: Although temperature is a typical parameter in all walks of life, in a comprehensive industrial system, there are often other sensing devices that need to be integrated into the system. Our products only help users complete front-end temperature wireless data collection, leaving the back-end data to the users themselves. The value lies in helping users solve problems such as inability to wire temperature measurement requirements, or eliminating wiring to reduce material and labor costs. Secondary development is suitable for engineers with certain programming capabilities. For a single temperature measurement requirement, we provide a complete solution even if the user does not know how to program.

Question 7: Why isn't the collector designed smaller?

Answer 7:

First of all, the wireless transmission core solves wiring troubles and reduces costs, so while designing for ultra-low power consumption, it also uses a large-capacity 3500mah power battery (its size is 18mm long and 50mm in diameter) that can last for many years, thereby greatly improving practicality;

Secondly, this product is mainly for industry. The sealing and waterproofing process is added to the design, so the overall appearance structure cannot be made small or cool.

Thirdly, if the size of the collector casing is designed to be too small, the radio frequency antenna cannot be well integrated into the casing, and the wireless transmission performance will also be significantly reduced.

Question 8: Why does the collector not use rechargeable batteries?

Answer 8:

First of all, the operating temperature range of rechargeable batteries can only be -20~70°C, while the battery we use is suitable for -40~80°C, which is suitable for both refrigerators and freezers, and in scenes with higher ambient temperatures such as outdoors.

Secondly, to achieve a 3500mah rechargeable lithium battery, its size will be more than three times larger, and its cost and price will be more than three times higher.

Thirdly, the battery we use has a self-discharge coefficient of <2% per year and a storage time of up to 10 years. However, the rechargeable lithium battery has a high self-discharge coefficient and cannot be used for several years on a single charge. Moreover, once the charging circuit is designed, the dormant power consumption will increase a lot, resulting in a shortened battery life.

Finally, online wireless temperature measurement often requires dozens or even hundreds of channels. Once the equipment is used for a long time, it is more troublesome to charge it. The industrial site environment is generally more complicated, and the construction is usually done for many years at a time. Our common cameras, mobile phones, Bluetooth headsets, etc., can generally be disassembled and carried at will, and have many functions. The battery itself cannot last for a few days, and one person generally maintains a device, so rechargeable devices are suitable for civilian products. The rapid temperature measurement products we will launch in the future also use charging methods due to their fast temperature measurement speed and high power consumption.

Question 9: Can the battery be replaced?

Answer 9: The battery is pre-built in the factory. When the battery is used up, you only need to open the collection casing to replace it. Although this type of battery is not available in most local stores, it can be ordered from us directly. We will also provide matching packages at cost prices. The battery can generally be used for many years, so do not reserve it in advance, because this type of battery should be the latest from the factory to achieve the best performance.

Question 10: How long does the battery last?

Answer 10:

The 59 series uses FSK radio frequency communication technology. According to actual measurements, the battery can be used for about 150 days if it transmits once every 5 seconds. The current of the 59 series when transmitting is about 90mA, the data transmission time for a single time is about 80ms, and the sleep current is 3uA. If it transmits once every 3 minutes, the battery can be used for about 5 years.

The 78 series uses LORA spread spectrum communication technology. It has been measured that one transmission in 10 seconds can last for 29 days. The 78 series has a current of about 120mA when transmitting, a single transmission of data time of about 700ms, and a sleep current of 1.8uA. If it transmits once every 5 minutes, the battery can last about 2 years.

You can also ask us for a more detailed power test data report, so the purely battery-powered wireless temperature measurement solution is more suitable for application scenarios that do not require high real-time performance.

It should be noted here that many merchants will only promote low sleep current to highlight the low power consumption of the product, which will bring the greatest misunderstanding to users, because the power consumption (battery life) of the device is directly related to the cycle of wireless transmission data, transmission current, transmission duration and sleep current, especially the time of a single transmission. The power consumption is lower. This is the essential reason why our temperature measurement front-end uses radio frequency communication instead of GPRS and NB. Because NB and GPRS instantly transmit current as high as 1A, this requires adding a voltage stabilizing circuit, which increases the standby power consumption by a hundred times. It also takes several seconds to complete a data transmission, and it also needs to be connected to the network. Especially in poor network scenarios, it is often necessary to connect to the network repeatedly, thus making the overall power consumption greater. Generally, GPRS and NB temperature measurement products transmit once every 20 minutes. The 3500mah battery can only be used for about 1 month.

Question 11: How to choose a collector?

Answer 11:

[Selection basis 1, temperature range] NT series recommends -30~120°C, PT series ha recommends: -100~200°C, KT series recommends: 0~1350°C, HT series: temperature and humidity are measured in the same way.

[Selection basis two: number of temperature measurement points] The 59 series is fast and takes up a short signal time. It is suitable for applications with many and dense temperature points, such as factory workshops. The 78 series is suitable for applications where the temperature measurement points are scattered and there are not many temperature measurement points, such as buildings.

[Selection basis three: real-time performance and power consumption] The 59 series sends a data packet once in about 80ms, and the 78 series sends a data packet in about 700ms. Therefore, the 59 series is more suitable for year-round temperature measurement, and the 78 series is suitable for slow-cycle temperature measurement with poor real-time performance.

[Selection basis four: Waterproof level] The LI series antenna has a built-in silicone seal, so the waterproof level is the highest. It can also be soaked in water for a long time. The LE series has glue-filled waterproofing inside, but the waterproof level of the external antenna interface is slightly lower than that of the LI series. Note that the concentrator and gateway we provide are not waterproof. If used in the wild, you can add a waterproof box to solve the problem.

[Selection basis five, accessory selection] The LI series is a built-in antenna, and the LE series is an external antenna. The LE series is more suitable for situations where it is fixed after installation. Because if the LE series is installed on a rotating or vibrating object for a long time, the RF antenna will easily loosen and fall off and be lost. The antennas of the concentrator and gateway can provide bendable rod antennas or suction cup antennas. Generally, if you want to install the receiver in a cabinet, you must choose a suction cup antenna to lead the antenna out of the cabinet.

[Selection basis six: Temperature measurement object] If you need to use an extension line sensor to measure liquids, and you need a waterproof process probe to measure metal objects, try to choose a patch probe to make the sensor fully contact with the object to be measured. If the temperature measurement environment is small, you can use a built-in sensor, such as a cold chain refrigerator. The advantage of an external probe compared to a built-in probe is that it can sense temperature changes faster than the built-in probe, that is, it has higher sensitivity.

[Selection basis seven, communication range far and near]

The 59-LI series can reach 200 meters in the open without obstruction. The environment test with vehicles and people on the road can reach more than 100 meters. It is about 20 meters behind the indoor and outdoor partition walls. It covers about 3-5 floors upstairs and downstairs.

The 59-LE series can be 1000 meters away in the open without obstruction, about 300 meters in the environment with vehicles and people on the road, about 50 meters behind the indoor and outdoor partition walls, and covers about 3-5 floors upstairs and downstairs.

The 78-LE series can reach 2000 meters in the open without obstruction, more than 500 meters in the environment with vehicles and people on the road, about 100 meters behind the indoor and outdoor partition walls, and covers about 10 floors upstairs and downstairs.

Question 12: How to choose a receiver?

[Selection basis one: scene space size]

The 59-LI series is recommended for room environments of about 200 square meters, such as: scientific experiment temperature analysis, pharmacy refrigerator temperature measurement,

It is recommended to use the 59-LE series for larger 1-2-story factory environments of about 4,000 square meters, such as: large cold storage, motor temperature measurement, raw material warehousing. By controlling the temperature, you can predict the aging state of the equipment and improve the product process.

It is recommended to use the 78-LE series for high-rise buildings with around 20 floors. If the house is wrapped in color steel, the 78-LE series can also be used, such as heating temperature measurement, hotel temperature measurement, and temperature monitoring to adjust air conditioners or boilers to achieve energy saving and emission reduction.

[Selection basis two: Who will process the data]

If users need to handle it themselves, we provide data interfaces and protocol formats, such as RE59-M-485 or RE78-M-485 concentrator, and users can develop and design configuration software by themselves.

If users cannot handle it themselves, we will provide relevant supporting software, such as RE59-P-USB or RE78-P-USB concentrator, which can be used right after booting. Similarly, the gateway can also provide free cloud services.

[Selection basis three: secondary development of data]

For the industrial control field, it is recommended to use RE59-M-485 or RE78-M-485 concentrator. It adopts the standard MODBUS-RTU protocol and RS485 hardware interface, which is suitable for bus expansion and configuration software programming, focusing on local temperature and humidity monitoring.

It is recommended for the Internet industry to use WG/ET/WT59/78 gateway receiver, which uses standard HTTP protocol and data parsing JSON format, and POST mode to transmit to cloud services

Some users may also choose RE59-M-485 or RE78-M-485 concentrator, and then transfer the GPRS-DTU, WIFI serial server or Ethernet serial server module to forward to their own cloud server.

Regarding the cloud server, if the user uses his own server, the data can be directly transferred to the user's server. If they do not have their own cloud server, they can give priority to the server we provide, and the supporting WEB APP is provided free of charge.

You can also use our cloud server for display and gradually develop your own cloud services and APP display software.

[Selection basis four: User experience]

For temporary temperature measurement tests, you can choose RE59-P-USB or RE78-P-USB to connect directly to the USB of the computer. No programming is required. Just turn it on and use the software we provide. The disadvantage is that the data will stop recording when the computer is turned off.

If you want to interact with programmable controls such as touch screens and PLCs, choose the RE59-M-485 or RE78-M-485 concentrator. Such users can integrate the design software by themselves.

For long-term temperature and humidity monitoring, the best way is a gateway receiver. After temperature collection, wireless data is transmitted to the gateway. The gateway then transmits the data to the cloud server through GPRS, WIFI or Ethernet. Users can remotely control the temperature through the WEB APP. Even if users are abroad, they can obtain data through mobile phones or computers. Compared with traditional stand-alone temperature and humidity recorders, the biggest advantage is that data can be downloaded and analyzed while measuring temperature. The data can be stored for up to 1 year, and the data can be retrieved at will within 1 year.

Note: There is no physical line connection between the gateway and the user's computer, but operates independently. Since the hardware and supporting software development costs of dedicated servers are very expensive, Alibaba Cloud, Tencent Cloud, Baidu Cloud, etc. were born. This type of cloud server is equivalent to a computer that is always running. For example, the cost of a server is 10,000 per year, but Alibaba and Tengyun sub-lease to 100 users through platform technology, so that the cost per user is reduced by 90%. Our company mainly sells hardware as its profit model. The free cloud service we provide is mainly to cooperate with the hardware to provide a closed-loop user experience from data collection to cloud storage. It mainly solves the temperature measurement user needs of some small and micro users and encourages users to build their own cloud servers.

Question 13: Can multiple sensor probes be inserted for temperature collection?

Answer 13:

No, because considering that wireless temperature measurement mainly solves the wiring problem, multiple temperature measurement points in the usage scenario are generally scattered, that is, one temperature is measured at different locations. This design is easier to expand both in terms of installation layout and software protocol. If it is made into a single collector, multiple temperature probes can be integrated. Due to some uses Users will want 3-in-1, and others will want 5-in-1, or 8-in-1, or even 16-in-1. In this way, the existing software cannot be universally standardized. Special customization on demand will directly increase R&D costs. If the user demand is small, it will only lead to a higher overall price. Customization only makes sense when there is a large demand.

Question 14: What is the length of the temperature acquisition sensor probe?

Answer 14: The default is 1 meter, other optional lengths are 2 meters, 3 meters, and 5 meters. Special lengths can be negotiated and packaged (delivered about 4 days after booking). An additional 3.5 RMB will be charged for each additional meter of the NT series and HT series, and an additional 5 RMB will be charged for each additional meter of the PT series and KT series. There are also a variety of probe shapes to choose from.

Question 15: How many collectors can a single concentrator and gateway support?

Answer 15: In principle, if the real-time temperature measurement is required (that is, the upload time is short), the number of collectors associated with the receiver should be small. The suggestions are as follows:

The suggestions are as follows:

The upload time is 10 seconds. It is recommended that the concentrator is associated with 1-2 collectors.

The upload time is 30 seconds. It is recommended that the concentrator is associated with about 5 collectors.

The upload time is 60 seconds. It is recommended that the concentrator is associated with about 10 collectors.

The upload time is 180 seconds. It is recommended that the concentrator is associated with about 15 collectors.

The upload time is 300 seconds. It is recommended that the concentrator is associated with about 20 collectors.

The upload time is 600 seconds. It is recommended that the concentrator is associated with about 30 collectors.

If there are many temperature measurement points, it is recommended to group them into different channels. This can optimize real-time performance and avoid co-channel interference. For example, 100 temperature measurement channels can be divided into 5 groups, with 20 temperature measurement points in each group.

Question 16: Can you provide invoices and discounts?

Answer 16: Yes, we are also a formal enterprise, such as Kaipu +5% (the tax on the invoice is 3%) If you issue a special invoice + 10% (the tax on the invoice is 13%), it is recommended to file the contract and open the accounts to the public when issuing a special invoice, so that the financial records of both parties are clear. Regarding the price, our aim is to focus on technical support in the early stage. The first time is a 10% discount promotion. Since the labor cost of early technical support is very high, the early discount will not be strong It is too big, but you can apply for a setter as a gift. The purpose is to support users to use our products quickly and better. Once the user can use it, if it is used for a long time, it will be supported at a special price. With different demand, there will be more room for discounts. For projects with particularly large demand (such as more than 1,000 pieces), the discount will be greater.

Question 17: Can it communicate wirelessly with equipment from other manufacturers?

Answer 17: No, there are many types of wireless chips, and wireless radio frequency transmission protocols are generally non-standard, so wireless temperature measurement products from different manufacturers cannot be interconnected. For example, we only provide temperature, temperature and humidity wireless collectors and receivers, but users also need wireless pressure collectors, which can only be purchased from other manufacturers. Then choose receivers from other manufacturers, and also comply with RS485 and MODBUS-RTU protocols, so that the RS-485 interfaces of RE series concentrators can be used in parallel.  

After dinner, you can take a look. It will help you better understand wireless temperature measurement. Sorry for bothering you.

Question 18: What should you pay attention to when using a temperature collector with a MODBUS concentrator?

Answer 18:

1. When users receive the product before using it, they must first tighten the antennas and pay attention to the power switch on the temperature collector, where - means turning on the power, and o means turning off the power.

2. After turning on one white collector, wait for more than 10 seconds before turning on the next one. Do not turn on the collector at the same time. Please note that once the collector is turned off, you need to wait for more than 5 seconds if you want to turn it on again. Because of the ultra-low power consumption design, you need to wait for it to be fully discharged before turning it on again.

3. After the concentrator is powered on, the blue and red lights will flash once, and the buzzer will sound once, indicating that it is started normally. Whenever data is received, the blue light will flash and the buzzer will sound. The buzzer is convenient for prompting during testing. In actual use, you can turn off the buzzer function through the blue switch No. 2 on the back.

4. The concentrator defaults to 485 mode. During testing, users can also switch to USB mode through the red DIP switch on the back to facilitate testing on the computer. After testing, switch to 485 mode for hardware online testing.

5. The default device slave address of RE59 is 0x59, the default device slave address of RE78 is 0x78, the baud rate is 9600, and the 8-N-1 format. The address and baud rate can also be set and modified as needed. The user only needs to read and process according to the instructions.

6. When the user sends an instruction through the serial port, the red light will flash, indicating that the serial port hardware is normal. When the instruction is correct, the serial port will return data. Please refer to the relevant documents for the specific data format. If the input instruction is incorrect, no data will be returned.

7. Multiple power inputs are for the convenience of users to choose. During testing, DC2.1 and terminal block input power ranges are 9-30V. USB is generally only used for user debugging.

8. When multiple concentrators are connected in parallel on a 485 bus, the slave address of each concentrator must be set to a different

9. The concentrator should be installed between multiple temperature measurement points as much as possible, and the collector and gateway should be installed more than 1 meter away from the ground or floor, so that the reception performance in the left, right, up and down directions is better.

10. The channels, synchronization words, and group numbers of concentrators and collectors in the same group must be consistent, and temperature collectors in the same group need to be started at intervals.

11. In scenarios where there are many temperature measurement collectors, it is recommended to group them. The key to grouping is that the channel parameters are more different (such as 16 in the first group and 20 in the second group), that is, the channels, synchronization words, and group number parameters of devices in different groups are completely different.

The default slave device ID of the 12.59 series is decimal 89, and the default slave device ID of the 78 series is decimal 120. This address can be set

13. The default is 9600,8,N,1, the device is a slave device, and the master device reads data function code is 0x03

14. The data storage register of each temperature measurement device is fixed. According to the rules, please note that only the third digit of the power value is valid. The register value is a hexadecimal signed number.

     The power value of the first temperature and humidity device is 40006, the temperature value is 40007, and the humidity is 40008

     The power value of the second temperature and humidity device is 40010, the temperature value is 40011, and the humidity is 40012

     The power value of the third temperature and humidity device is 40014, the temperature value is 40015, and the humidity is 40016        

15. Please note that only HT59 or HT78 has a humidity function, and NT/PT/KT only has a temperature function, so the humidity register value is 0X8000

Question 19: What should you pay attention to when using GPRS gateway and temperature collector together?

Answer 19:

1. Screw the antennas in place. Pay attention to the antenna distinction. The SD card on the gateway contains system files, so the SD card and mobile phone card should try not to touch it.

2. The wireless temperature collector has a power switch, where - means on and O means off. Do not turn on the collector at the same time, and do not turn the collector on and off repeatedly. When you turn off the collector, you must wait for more than 5 seconds before turning it on again. Because of the ultra-low power consumption design, you need to wait for it to be fully discharged.

3.

The gateway should be installed between multiple temperature measurement points as much as possible. The collector and gateway should be installed more than 1 meter away from the ground or floor, so that the reception performance in the left, right, up and down directions is better.

4. If the user buys a gateway with a display screen, if it is not operated for 5 minutes, it will automatically turn off the screen to save power. Just press the second button on the right to wake up the screen.

5. When there are more than 12 temperature devices, press the first button on the right to cycle through the pages.

6. The gateway with display screen has a built-in battery by default, which makes testing convenient. If you want to plug in the charger for long-term power supply after installation, please turn the red No. 2 dial switch at the bottom to cut off the battery to avoid damage caused by battery overcharge.

7. The channels, synchronization words, and group numbers of concentrators and collectors in the same group must be consistent, and temperature collectors in the same group need to be started at intervals.

8. In scenarios where there are many temperature measurement collectors, it is recommended to group them. The key to grouping is that the channel parameters are more different (such as 16 in the first group and 20 in the second group). That is, the channels, synchronization words, and group number parameters of devices in different groups are completely different.

Question 20: What should you pay attention to when using a WIFI gateway and a temperature collector?

Answer 20:

1. The antennas are all screwed in. Pay attention to the distinction between antennas. The left side is the 433 antenna and the right side is the 2.4G antenna. The SD card on the gateway contains system files, so try not to touch it with the SD card and mobile phone card.

2. The wireless temperature collector has a power switch, where - means on and O means off. Do not turn on the collector at the same time, and do not turn the collector on and off repeatedly. When you turn off the collector, you must wait for more than 5 seconds before turning it on again. Because of the ultra-low power consumption design, you need to wait for it to be fully discharged.

3.

The gateway should be installed between multiple temperature measurement points as much as possible. The collector and gateway should be installed more than 1 meter away from the ground or floor, so that the reception performance in the left, right, up and down directions is better.

4. If the user buys a gateway with a display screen, if it is not operated for 5 minutes, it will automatically turn off the screen to save power. Just press the second button on the right to wake up the screen.

5. When there are more than 12 temperature devices, press the first button on the right to cycle through the pages.

6. The gateway with display screen has a built-in battery by default, which makes testing convenient. If you want to plug in the charger for long-term power supply after installation, please turn the red No. 2 dial switch at the bottom to cut off the battery to avoid damage caused by battery overcharge.

7. The channels, synchronization words, and group numbers of concentrators and collectors in the same group must be consistent, and temperature collectors in the same group need to be started at intervals.

8. In scenarios where there are many temperature measurement collectors, it is recommended to group them. The key to grouping is that the channel parameters are more different (such as 16 in the first group and 20 in the second group). That is, the channels, synchronization words, and group number parameters of devices in different groups are completely different.

9. The WIFI gateway needs to pre-select and set the WIFI account and password. After setting the parameters, restart to take effect. When connected to the WIFI network, the green indicator light is always on. After the gateway is turned on normally, the yellow light is always on, indicating that the WIFI device is initialized normally. When the collector wirelessly uploads data, the blue indicator light flashes once, and when the WIFI gateway uploads server data, the red indicator light flashes once.

Question 21: What should you pay attention to when using an Ethernet gateway and a temperature collector?

Answer 21:

1. Screw the antennas in place. Pay attention to the antenna distinction. The SD card on the gateway contains system files, so the SD card and mobile phone card should try not to touch it.

2. The wireless temperature collector has a power switch, where - means on and O means off. Do not turn on the collector at the same time, and do not turn the collector on and off repeatedly. When you turn off the collector, you must wait for more than 5 seconds before turning it on again. Because of the ultra-low power consumption design, you need to wait for it to be fully discharged.

3. The gateway should be installed between multiple temperature measurement points as much as possible, and the collector and gateway should be installed more than 1 meter away from the ground or floor, so that the reception performance in the left, right, up and down directions is better.

4. If the user buys a gateway with a display screen, if it is not operated for 5 minutes, it will automatically turn off the screen to save power. Just press the second button on the right to wake up the screen.

5. When there are more than 12 temperature devices, press the first button on the right to cycle through the pages.

6. The gateway with display screen has a built-in battery by default, which makes testing convenient. If you want to plug in the charger for long-term power supply after installation, please turn the red No. 2 dial switch at the bottom to cut off the battery to avoid damage caused by battery overcharge.

7. The channels, synchronization words, and group numbers of concentrators and collectors in the same group must be consistent, and temperature collectors in the same group need to be started at intervals.

8. In scenarios where there are many temperature measurement collectors, it is recommended to group them. The key to grouping is that the channel parameters are more different (such as 16 in the first group and 20 in the second group). That is, the channels, synchronization words, and group number parameters of devices in different groups are completely different.

9. When the gateway receives the data wirelessly uploaded by the collector, the blue indicator light flashes once. When the gateway is connected to the network, the yellow indicator light on the left side of the network port is always on. When the gateway uploads data to the server, the green light on the right side of the network port flashes.

Question 22: What is the use of the QR code on the device?

Answer 22:

You can pay attention to the sticker on the side of each device. Scan the QR code to get the default parameters. If the setting software is connected to a phone with an Internet connection, scan the QR code after setting, and the parameter information inside will change. This is beneficial to the maintenance of the device. For example, if you forget the parameters for a long time, you can scan them and obtain them, which is conducive to analysis, because if the parameters are incorrect, communication will not be possible.

1. If you use a wifi or Ethernet gateway, do you also need an http api-key request header?

Answer: If the data is uploaded to the user's own server, the api-key is not required. The api-key is only required when it is uploaded to our server.

2. If it is a wifi or Ethernet gateway, do I need to assign a port when setting up each gateway? 

Answer: If you use a static IP, you need to assign an IP