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In this lecture, we are going to implement the necessary functionality in the note read flow so that

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we can get the which it is necessary to calibrate the pump a threshold.

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And I've already created the new components of the flow.

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You are updated version through the integration for and it's this part of the flow here.

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This is the new part of the flow.

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But what I'll do is I'm going to delete.

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The flow, our vision for and then continue from Vision three, just make sure that there are no missing

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bits and pieces in the way that I implement it.

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So I'm going to start first by exporting vision through which the current flow situation for version

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three of the flow.

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Copy that to the clipboard and go back into the burger menu.

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Choose import, paste the chasten file.

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Select new flow and import.

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Right now, I'm going to do a rename as soon as the notification gets out of the way, rename this into

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a version for.

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Right, and enable it.

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Click, click on the enable button.

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All right, so I want to add the new part of this movie down here.

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We can call it a Lou.

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I'm going to make a little bit of room.

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They did down there and of course, the first thing that I'm going to add is this the numerical import

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widget, this note here, this implements the widget.

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And in it, what I want to do is to set the range of values that this widget would allow us to select.

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So because we are talking about analog input, that is Timbits in a number of bits, we've got a range

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of zero to one thousand and twenty three.

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And it's going to be tedious to change your values.

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If you want, I'll make it 10.

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I'm going to give it an appropriate name.

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Let's call this threshold and call the name of the node as well.

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Pump Threshold's.

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That's the label that will appear in the dashboard.

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Also going to set up tooltip think this is useful.

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I say that this sets a row limit, the value of which is turned on.

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So lets you hover your mouse over the widget.

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You'll see this message for information for the user and the position of this node widget.

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I'm going to put it into a new group.

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Which belongs in the terrorism tab, and I will call this group.

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The threshold should be a bit more specific to set the threshold.

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OK, with six is enough.

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All right, so let's make let's give this a width of six and the rest is all good.

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So I'm going to click on Done and there's this note.

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This first note implemented.

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Then what I want to do is whatever the user selects.

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This has to go into a flow variable because we will need to take that into account in our pump operation

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function when the function is making a decision here of whether to start the pump or not.

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So at the moment, this is a fixed five hundred.

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But once we have the ability to set arbitrary threshold instead of 500, we will need to use the actual

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threshold that the user has said.

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So we'll replace that with a flow variable.

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And while I'm here, I'm just going to set it right now or change make the necessary change right now.

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And what I want to do is to get a flow, get the value stored in flow variable with name, soil humidity

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threshold.

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OK, like this, so no fixed value or get the life soil humidity threshold from this low.

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OK, this is good.

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Close the dialogue and let's continue now with another function.

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We to put a new function here so that we can actually set the threshold.

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So I'm going to go in here.

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I'm just going to copy the code.

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So don't type it and make typos.

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This is going to be the flow set function, which sets the flow variable.

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So you're committed to a threshold with whatever value has been passed to the function node from the

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pump threshold, numerical input node.

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And we don't really care too much about what is return to serve.

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I'm just going to return message.

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But just to be good actually with this and consistent, I'm just going to return the message paillard

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actually I'm going to return the whole message this fine so that we can set something useful after this

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note, such as a debug node for the name.

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Can you call these things cept.

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Humidity know.

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Humidity threshold, to be more specific

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like this.

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And click, OK, now, the next thing that I want to do here is to use an empty outmoded.

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This one here, so that any value that the user sets for the threshold is sent to the ISP 32 controller

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via the security broker.

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The next thing that I want to do here is to use it and get it out nood so that when the user changes

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the threshold in the red dashboard, this information is sent to the speaker to via the broker, so

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that the sketch running on the ESB 32 can take this arbitrary value into account when it sends an update

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to the flow.

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And I'm going to show you the necessary change that we need to make in the USA to sketch in the next

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election so that it can read this number and use it.

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So for now, I'm going to configure the integrity out node and give it a name first.

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And now we are going to create a new topic, the liquidity broker, which is going to beat this.

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So the soil humidity threshold, as usual, let's go for quality of service zero and click on Turn Connect

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these two together.

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And we could also welcome here here to put in a new debug node so that we can see.

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I said, I'm tired of you.

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It should be concise, the current humidity.

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Threshold.

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Right back in here in the threshold node, I think just make sure that everything is correct here.

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Yup, everything looks good.

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Now I can publish this flow.

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And check it out here.

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Here's a new group, you can see that here's a widget that allows me to change and set the threshold.

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But the problem here is that it starts at zero.

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So obviously now for me to set this widget to five hundred, I have to keep clicking on the up arrow

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and just not a very good user interface.

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And I'm just going to refresh and can feed staes.

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But if I restart the whole note read service, this is going to go back to zero and I'm going to retain

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its value.

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So before I actually marked these modifications as complete, there's one more thing that I need to

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do, and that is to use and inject node to inject a initial value into the threshold node.

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So let's go inside here inside the inject to give it a name first.

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Let's say set the default threshold and this is going to be a number.

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And let's start with five hundred our values, a reasonable first number.

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And then because I want this to actually happen without me having to click on this button to enable

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it just connected to right now I have to actually triggered by clicking on this button here, but I

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want this number to be injected into the threshold node pretty much as soon as I deploy or I start this

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flow.

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So I'm going to go down here and click on inject once after, let's say, zero point four.

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Make it one second just to begin with.

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And that's it.

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We only need to inject it once and then we have done with this.

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So check this out if I'm going to make this a little bit more delay to demonstrate how this works or

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make that five seconds.

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So what I'll do is I'm going to deploy this flow and have a look at what happens to this number right

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here about five seconds later.

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So deploy and see.

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There you go.

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So now it's set automatically to a much better value of five hundred.

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All right, so this works.

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So I will change this with five point one seconds after we deploy the flow.

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This value will be reset.

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OK, so that's about it.

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With the modifications necessary in the flow itself to give us the widget.

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One last thing I'll do here is actually change the positioning of the groups so that.

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The threshold set books is closer to the left side are the way I see it, is for the user interface

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components that require input or offer input options to the user.

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Go to the left and then the rest of the readings go into the right side.

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So let's move this say up here and redeploy, OK?

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And it's better the flow works now.

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We can actually test it.

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I'll turn on the power supply.

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And let's set.

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The threshold to say six hundred and.

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Try to increase.

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The humidity.

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And it works.

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For turn it down a little, said to.

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Five seventy.

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We need to actually trigger the function by changing the name.

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She did not pick it up automatically, that just because on the flow, the value is said to below the

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needle value.

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So the threshold value is below the needle value unless I trigger the function to work this function

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to work, which only happens after it gets input from the security broker.

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We are not going to get any decisions about the pump state.

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So this is a normal operation.

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OK, so it works, but I still love the game.

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But I also want to make a small change in the history theory to sketch so that this new threshold value

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is taken into account by the EPA to show that it does not sent any updates to the flow which would trigger

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the function here unless the soil humidity threshold from the sensor is above the threshold.