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In the previous lecture, we implemented the first iteration of the sketch that is now running on the

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E.S.P 32, and what we'll do now is to finish the first iteration of this project by creating the first

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version of the terrorism controller note read flow.

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There's a few ways you can go about creating this flow, but I think that the simplest way to get started

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is to implement the component of the flow that controls the motor or the pump.

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So imagine that we can access the dashboard here like a dashboard here.

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I've got a group in which we've got a single widget like a a switch perhaps.

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And when we click on the switch to turn on, then the motor turns on.

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When we turn the switch off the motor potential so that we will know that we can control the state of

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the motor from inside our terrarium control and node red flow.

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And then we can move on to the next step, which is to implement the part of the flow that reads.

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The value from the potential consumer takes a value and compares it to a threshold that we also set

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and then turns on the motor or automatically without us having to use the manual switch.

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So let's go ahead and implement this functionality in note read.

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The first thing that I'll do is it take a switch and drop it onto my head and control of the wine flow

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that I've just created a bit earlier and go in to change its settings.

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So for the group in which this widget belongs, I will set it to the terrorism manual Pump Control.

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It's a group that are created earlier.

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She can see it right here and just leave the size to automatic for now.

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We can play around with the user interface later for the label.

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Let's call this.

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Manual pump.

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Control copy the same value down in the name field as well.

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Now the payload is important.

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Remember that in our Arduino sketch for the pathetic two down here, we would do the control, the control

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function.

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We are expecting a string.

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So whatever the payload is, it needs to be a string and got a single character in it.

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If the character easier than the pump is turned off and if the character is one, then the pump is turned

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on.

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So with that, let's change the payload from a bully into a string and make that a one so that when

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the switch is on, that's the character or the string with a single character that comes out.

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And then when the switch is off, another string, which is going to be zero.

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All right, done.

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And want to make sure that this is actually committed because I did have some trouble with this earlier.

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Seems to be a small bug here with this particular widget.

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So you can see that the old value is still true, even though I changed it and the value is false.

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I'm not sure why this is happening.

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So I noticed that actually, if I put a couple of values here like that, instead of a single shot,

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if I put a couple of characters in the string instead of a single string, this seems to work better.

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So now you can see that the old value and the of value are correct.

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We can just let it go the way that it is.

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And the security sketch will only read the first.

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Character from this array of characters, which is the one in the zero, which are correct, but if

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you want to be consistent with the values that you insert in the payload, so you don't see this a bit

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later and get confused, you can just remove the second character and it should stay on since we were

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able to move away from the original to enforce values.

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So let's try that out.

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Yeah, we've got a one and to zero.

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So again, this I think it's a small bug with the user interface of the particular widget or they know

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that we are working on with at the moment.

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So I was able to tweak it and get it to work the way that I wanted.

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All right.

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So we've got the pump for deploy this.

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You see the manual pump control is now in the group.

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So the next thing we need to do is to send the value from the payload of the switch to the appropriate

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and quiddity topic.

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So I'm going to add a new node here for an hour.

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Then instead of picking it from the left side, the left toolbar, you can just right click anywhere.

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I'm using the control key here because I've only got one button in the mouse that I'm working with and

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just search for the node that you want.

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So let's get it out and connect it and its properties.

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And for the name, I will say publish.

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Whump state, just to make it obvious what it is for the server and I'll go for the client that is on

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my note, Red Raspberry Pi and for the topic itself gets copied from the sketch.

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And it's this topic that we want to publish to copy that.

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And pasted in here.

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OK, for quality of service, let's say, to the Zero and Kundun and deploy.

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All right, let's check it out now and see if it works.

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I've already turned on my benchtop power supply and I've said it to five volts, gets it right here.

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It's ten dollars of power is provided to the material on my fretboard.

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So I should be able to just turn it on.

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It's working and turn it off again, perfect, and I'm just going to also show you what is happening

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here in the studio monitor so you can see the output from the sketch.

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Just give a bit more space.

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All right.

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So I'm going to turn it on.

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This is the debug information from the library itself, and you can see that the state just took the

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order scroll.

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The state that it's received is one this message here is coming from.

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This the debugging messages that we have enabled in the setup method.

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All right, let's turn it off.

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And you can see that the message was received by the U.S. military to immediately object.

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All right.

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So now we know that we can control the pump from the dashboard.

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And before I move on to the consumer, I'd like to add a couple of other notes here just to finish up

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with the manual pump control component.

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So one thing that I would like to add is a simple text output widget.

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Like this, so that on the dashboard itself, we can see in text the state of the pump, so I'm going

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to place this in the terrarium pump group.

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So the pump group, I plan to have information about the status of the pump.

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So put it there, leave it to automatic and just say something like pump is pump state is.

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And that will give us a one or a zero like this.

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As for the label and for the name of the note, I just say pump state, all right, deploy.

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And now it looks like this can see one and zero is updated.

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And as I usually do with all of my flows, I also want to have a debug.

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Our put.

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So that I don't have to switch to the dashboard to see what is going on.

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So this is going to be a pump state.

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That is simply going to give me whatever comes out of manual control on the debug tab right here, because

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remember that Alice flew in the next lecture will be able to automatically determine the pump state.

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So I would like to be able to see the pump state here in the back window without switching to the to

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the dashboard.

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OK, so this is enough for the time being.

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We can control the pump from our dashboard.

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There's a little bit more work to be done here in order to improve it.

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But it doesn't make sense to do this now because we really need to implement the part of the flow that

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works with the potential mirror or the soil humidity sensor, which will automatically determine the

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appropriate pump state.

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And that will also probably make another small change here in the pump control part of the flow.

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So let's move on to the next lecture.

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Where will implement the heart of the terrorism controller, no feat that involves the potential.