Name: Arduino - 土壌水分センサー (Arduino - Soil Moisture Sensor)
Uploaded: 2021-01-14T10:44:06.000Z
Duration: 19 min 26 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

The computer guy dot com In order to view schematics, code and Maur for the projects that you are learning about welcome back.

So in this video, we get to pull out the turkey baster.

So what is a turkey baster have to do with Arduino projects?

I'm gonna show you in a couple of minutes.

So the project that we're going to be dealing with today is we're going to be using a soil moisture sensor for an Arduino again.

When you think about creating art, we know projects.

One of things you should think about is what are the real world applications?

What are the real things people would actually care about?

And one of the things really is basically determining whether the moisture in the soil is of the appropriate level.

Think about how many people have flower gardens or urban gardens Or basically, you know, all the people out there they've got always wonderful potted plant.

Some have to replace a part of plants every month because they forget to water them where they overwater them.

Right, This is a really this is a really legitimate issue watering your plants the appropriate level is a really a problem for real adults.

And so what this this soil moisture sensor does is basically it reads the resistance between the two prongs s.

There's a positive problem in a negative problem.

You put this into the soil and the current tries to go between these two problems and it sees what the resistance there iss.

So basically, the Maur resistance there are is the dryer.

The soil is the less resistance there is, the wetter the soil is.

So we're able to take that as an analog reading.

So we're able to get a number output and then when Once we have that number output, we can make that a value of a variable.

And then we can put that into a function for all kinds of different things to happen.

Maybe you could post to a server, So if you have, if you have these with Arduino, you know, wife eyes in multiple different gardens they composed to a server.

You can wake up in the morning and you can see which gardens should be watered or wish garden should not be warranted.

And if you don't want to connect to a network.

Maybe you could simply have the Arduino, you know, have a green led or a red led a green led.

If the soil is bad or again, we're in the yard, we know we're in the yard.

Not only do we want to be notified of problems, but really, if the system can automatically rectify the problem, that's really the good thing.

That's really what the modern world's about.

So we can also have is we can have the art we know, you know, basically be able to read at the value of the variable.

And if that value of is whatever it should it be, it could do something, such as turn on a water pump to automatically water people's gardens.

You place these in there, you have them connected to different water pumps when it gets too dry, then pumps out water into the garden, and you have a great little automatic irrigation system.

One of the great things you can do with our Reno's, too, is again.

You can have multiple sensors so you could have the soil moisture sensor.

You could have a photo tenant fan sensor, basically determine what the sun like sunlight currently is, and you could have a temperature sensor.

So one of things you could dio is you don't want a water plants in the middle of the day when it's too hot.

So basically, you could say if the soil is dry and the temperature is below 80 degrees and it's dark, then water the plants.

So these are the types of things that these types of projects you can start doing once you add in things like this little moisture sensor.

So with that, let's go over to my little workbench to show you howto put this little project together.

Then I will show you a very simple code and then show you the example of how it all works in action.

So here the components that we're going to need for this particular project, you will notice some non technical components Here.

We need these non technical components to be able to test the sensor and be able to see how the readings work.

So I just have a little glass of water here is just plain normal water and I also have a mug of potting soil.

So this is just relatively a dry potting soil, so we can put the sensor into that to determine how wet it is.

And then we have the turkey baster, the turkey baster.

So since this is a dry soil, what we're going to dio is we're going to put the moisture sensor into the dry soil, see what the reading is, and then we're going to start adding water and see how they're reading changes.

So those air than on, like really technical components.

Beyond that, this is all that is required for this project.

So we have our soil moisture sensor here.

And so when you buy this, this all comes as a kid.

So the problems here betting on which ones you buy, they actually don't have any brain power to them.

Basically, these air just problems that you plug into the ground and then you have the positive and negative wires that you then run to this little controller unit here.

So this is the brains of this particular unit.

Then pass that when you take a look at the module for this unit, you'll have positive you're VCC and you have ground.

Now you complain the VCC either into five volts or into three vote.

You will get a different reading from it, depending on whether it goes into five or three volts.

So just whatever you're gonna do for your project, just keep doing that because of you set a value for variable in an if statement that should trigger.

You may run into some issues there, then passed that we have the analog outputs.

So all the way on the right hand side, we have the analog outputs of the analog output.

So with this particular type of moisture sensor, you can actually have digital output or analog output in order to read a specific number.

What we're gonna be using today is the analog output, and this is really all you need for what we're going to be doing today.

We're going to ground and then we have the analog.

Why're going to a zero this is how the project is built.

So let's go over and take a look at the code.

Here is literally all the code, our main lines, that is, that is all the code that we're going be doing today.

So there's no libraries or anything else.

This is very simple, since basically over we're doing is reading from an analog sensor.

The first thing we're gonna have to do is you're gonna have to define the analog pins.

We're gonna define a zero, and we're going to call that the soil sensor.

So in order to reference a zero now we will say soil sensor.

Then we go down and we set up the environment, and all we're gonna do here is we're simply going to do serial dot began 9600.

So this starts the serial monitor service so that we can actually read out from the Arduino and see what the sensor readings are then passed that we get into the loop and literally Oh, my God.

So we got into creating a variable sensor of value equals analog, reads the function and log read soil sensor.

So we're going to analog, read a serial a zero, and then we're simply going to a serial dot print line the value of sensor value.

Then we're going to delay for 500 milliseconds, or about half a second.

So basically all we're going to be doing for this particular project is reading the analog value from that sensor pin on and then printing it out to the serial monitor.

So let me let me upload this code to the art we know, you know, and I'll show you how it works.

So I've connected the Arduino, you know, and I have uploaded the sketch.

So now that it's powered, we can go to tools, we can go to serial monitor and we can see what the output ISS so we can see that we're currently getting an output of 1023.

So if we take a look, we have the sensor right now and the sensor is not connected to anything at all.

It's not in the soil, it's not in water and so we can see the max value.

The max resistance that we're going to get is 1000 23.

Now one of things I'm gonna show you is the minimum resistance.

So if the high is 1000 23 what I want to do in this kind of shows you how this works is if I connect both sides.

I'm connecting the mail to one side, the mail to the other.

And as we can see, the value goes down to zero.

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Arduino - 土壌水分センサー (Arduino - Soil Moisture Sensor)

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