Midday hour
This moment is the summer solstice of 2023 in the Gregorian calendar, noon.
Even in the rainy season in the south, it is difficult to beat the scorching sun, and it is scorching.
Looking back at 2013, mobile apps were in full swing at that time.
Few people have asked whether they need to build a mobile application
Everyone has "defaulted to the mobile terminal is the mainstream".
And the competition for mobile app experience continues to roll out of the sky.
Today, it is in the ascendant.
The Internet of Everything (IoT) is also quietly transforming.
It's no longer an ethereal word, an unclear concept.
Instead, it is a reproduction of the once when the app was in full swing on the vigorous road.
In 2016
Bike-sharing makes the city yellow and green.
It also made GPRS, which was less than 15 yuan, experience the final madness on the eve of withdrawing from the network.
In 2018
Water meter, heat meter, gas meter, three meter reading.
Let the 3GPP R13 just freeze and be born of NB-IoT soared.
But the days that followed were also embarrassingly witnessed.
Its debut was the pinnacle, and then it was not a hit.
In 2020
Zhanrui Ivy 8910dm module is ripe.
Hezhou 9The 9 yuan development board sold out thousands of sets in half an hour.
It kicked off the prelude to the CAT1 module sweeping the market.
It has also opened up the momentum of the Internet of Things battlefield.
A hundred flowers bloom, a hundred schools of thought contend.
Boost CAT1 from 20 years of annual shipments of 20 million units.
By 22 years, the annual shipment has been more than 100 million.
In 2023
The cat1 module** has dropped to 15 yuan.
Collection cloud horns in the streets and alleys.
Cloud POS machines and public network voice intercoms are all over the world.
It's not hard to deduce.
Annual shipments will be an astronomical figure.
Now. It's the same as the app 10 years ago.
The market has fully woken up.
There is no fluke, no advanced pilot.
There's no need to educate clients, there's no need to preach concepts.
The only thing that needs to be done is to sincerely serve the segmented scene.
The sincerity that remains the same even if the sea recedes.
Because at this moment. It's already the midday hour of the Internet of Things.
The universe of the Internet of Things
Just like in the Marvel Universe.
Spider-Man, Iron Man, and others.
Each of the characters comes to life.
to form the colorful Marvel world.
The Internet of Things is also impossible.
Only cat1 nb
In fact, they are just a corner of the vast universe.
Various IoT technologies.
It has quietly facilitated our lives.
BLE Bluetooth
In addition to headphones for listening to songs.
Locking of lockers.
Unlock the electric car with your phone.
* Inner price tag update and inventory tracking.
It's also very likely that it's working behind the scenes.
zigbee
This may sound like a word that has something to do with "bees".
* Inspired by "bees fly in a zigzag shape to discover the location, distance, direction, etc. of the target".
A technology concept that seems out of reach.
In fact, it has been used for a long time in the network connection of Xiaomi smart home.
Microwave oven, electric curtain, smart smoke detector.
It's all in there.
wifi
This is the concept of networking that we are most familiar with.
Let's not talk about mobile phone Internet access for the time being.
Smart switches in hotel rooms.
Air conditioning linkage with temperature and humidity sensors.
Who is served by the router.
For a long time, it wasn't just our mobile phones and computers.
TV, washing machine, air conditioning.
I don't know when we can go home.
Turn on the water heater through your phone first.
It's imperceptibly convenient.
It's helped unconsciously by wifi.
fsk/lora
The absolute king of sub-ghz.
Especially the younger brother Lora
The full name is Long Range Radio
It was still draped at the beginning of its birth"Military use"The cloak of mystery.
In fact, it is to meet the strict target of "both want and want".
It is necessary to have low power consumption and long distance".
The good news is.
It did, 3-5 times longer than its older brother FSK.
What's even more gratifying.
It is also fully open in the civilian sector.
Urban Pipe Gallery", "Farmland Irrigation", "Intelligent Greenhouse", "Smart Park".
and so on.
Although they can't be seen.
But every time the valve is linked.
Aggregation of sensing data.
They are all silently supporting.
Is cat1 good, or is NB better?
Is lora good, or is wifi good?
Actually, there is no answer to this question.
It's like asking Spider-Man and Iron Man.
Who's more powerful.
In fact, these network technologies.
Each has its own characteristics and emphasis.
They're all there. Each of them has its own powers.
They're wonderful.
Convergence. The colorfulness of this IoT universe.
Cooking fresh
Lao Tzu has a saying that if you govern a big country, you should cook small fresh.
Cooking Xiaoxian" must first understand the characteristics of "Xiaoxian".
Small, it should not be turned too much, it is easy to break.
Fresh, it should not be attacked by fire and lose its taste.
Implementation of an IoT project.
Wouldn't that be even more so?
Selection of technical products.
It's not binary, either/or.
Rather, it is based on the appropriate scenario.
Use its strengths. Comply with the implementation, only to get twice the result with half the effort.
For example, an agricultural irrigation project.
The requirements of the objectives are varied.
The environmental constraints faced are also diverse.
Target requirements:1*Monitor.
2.Temperature and humidity monitoring.
3.Valve control.
4.Irrigation rate monitoring.
5.Cloud rollup.
Environmental constraints:1*The area is powered and has 5G coverage.
2.The irrigation monitoring area has power supply and 4G coverage.
3.There is no power supply in the temperature and humidity monitoring area, and some of them have no network coverage.
4.There is no power supply in the valve control area, and there is no network coverage at all.
5.The valve control area is geographically long and narrow, discrete, more than 20km
In this case, it is not something that a single network technology can support.
For ** surveillance, there is 5G coverage.
You can choose from Hikvision's 4G+** devices.
For areas with power supply and 4G coverage.
You can choose the acquisition and transmission of CAT1 of the conjunction.
But for areas not covered by 4G networks.
Bearer control, collection and other small data stream transmission scenarios.
It is common practice to use sub-GHz lora for blind filling.
Compared to WiFi BLE, LoRa diffraction is stronger and the distance is longer.
Compared with Zigbee, Wi-Sun, and LoRa, the cost is better.
But here if adopted.
LoRa's central network + power expansion + dot trunking.
Under the constraints of a battery-powered environment.
It's not elegant enough.
1.Battery life has shrunk.
2.The deployment of the central gateway requires geo-centralization.
3.Solar panels may need to be deployed to power the gateway.
It's like a fire.
It can be cooked but loses some umami.
In the midst of the tangle, the elegant choice appeared.
255mesh products of Nanjing 255.
It is LoRa-based, in terms of power consumption and long-range requirements.
Meet expectations. What's even more commendable.
255Mesh products have built-in support for Mesh networking.
Without sacrificing power savings!
Ultimately. Over the entire 20km discrete narrow project area.
LoRa network using Mesh.
1.There is no reduction in battery life.
2.No central gateway is required.
3.Eliminates the need for solar installation.
Together with the 4G camera and the CAT1 RTU.
The best combination is presented.
Five flavors and cook a little fresh!
Just look at the scene
The Internet of Things in the current market.
Technology is not unsophisticated.
The products are not diverse.
From the point of view of implementing the project.
There is no need to find the best.
Just "the best fit" is required
For example:1Do I need to patch the net?
2.Is it battery-powered?
3.Is the network complex?
4.How much data traffic is?
5.Need real-time downlink?
When we can quantify the scene problem.
How to select a "connected product".
It's a question of "whether it's suitable or not".
255mesh.
1.LoRa ad hoc network, strong diffraction, longer distance.
2.Automatic routing, no routing table required.
3.The network is self-healing, and no manual reset is required.
4.Node sensing acquisition and network relay dual-mode operation.
5.Low power consumption, average standby current 15ua
Extensively validated in typical scenarios:
1.Smart Buildings, Environmental Sensing, Remote Control.
2.Smart parks, street lights, irrigation, access control.
3.Comprehensive pipe gallery, temperature and humidity sampling, fire control.
4.Underground mines, gas monitoring.
5.Field collection, battery-powered, network blindness.
in your scene.
Is there a fit?