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In the previous lecture, we implemented the task schedule so that we don't need to use any delay functions

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at all in our schedule, and that, as I said earlier, improves the capabilities of our inspectorate

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to sketch its efficiency.

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It also allows us to implement new functionalities that would be fairly hard and complicated to do without

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a task scheduler.

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What we'll do in this lecture is to implement a safety feature that involves getting the pump automatically

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turned off after five seconds of operation.

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And as you'll see in a moment, this is something very easy to do with the task scheduler.

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And at the same time, we will edit.

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I'm going to do a bit of refactoring and improve the organization of the sketch.

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And in particular, what I'm going to do is to make the voltage reporting functionality independent

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of the soil humidity reporting.

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Essentially, I'm going to put report for that use to be executed in its own task, in its own schedule.

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So to do that, I have implemented the changes in version five of the sketch.

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Let's have a look at it in the header of the sketch, here is the soil humidity core back and its task

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and I have added another two tasks and callbacks, the pump of Cool Back, which will ensure that the

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pump is turned off five seconds after it starts.

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And then also have to report to both the Chiefs quarterback, which will be independently reporting

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voltages every two and a half seconds, while humidity will be reported every once and again independently.

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And we still have the single runner.

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A single runner can control multiple tasks.

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So these are our quarterbacks then inside.

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The set up function.

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We initialize the runner, then we add the three tasks and we enable two of them, so I have enabled

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here the soil humidity task in the report voltages task, which I want these tasks to be enabled always.

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And therefore, I don't have to worry about turning them on and off.

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But the task scheduler gives me the ability to programmatically enable or disable a task.

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And when I enable a task, it's time I essentially start counting and when I disable it, it does not

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for the pump.

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It does not make sense to enable that at the beginning or in the setup of our sketch because I only

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wanted to count down if the pump is turned on.

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So that's when I will be enabling it.

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So we'll have a quick look at that next.

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Let's see, what else do we have here in terms of changes?

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There's the loop in inside the loop.

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We've got the execute function of the runner called every time we go through it.

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We no longer report the humidity inside the loop in this no more, no longer delay.

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Here's the report.

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Humidity core back, which you saw in the previous lecture, that's where we implemented it.

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And now you see that at the bottom of this function commented out the report voltages call to the public

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function because this is now happening by the scheduler.

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So let's put it out next.

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Now, here's the thing that I mentioned earlier about the pump control in control.

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The function, the code is exactly the same, except for line one hundred and forty six in line one

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hundred and forty six.

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I call the enable delayed function of the turn pump off task and a part of the value of 5000 the 5000

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milliseconds, which means that this function will count down to 5000 and then it's going to call each

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callback function or the tasks callback function, the turn off pump task callback function as we saw

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at the top.

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Is this pump of.

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So that is implemented right here and as you can see, what happens in that is to turn off the pump

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by sending a low signal to the pump pin and then we call the disable function of the task to turn it

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off and then it's going to be turned on again.

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Some point later when the pump is turned on again, and that's where the 5000 millisecond counter restarts.

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Another callback he can see right here is the report, which is called Back.

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This is called right now every two and a half seconds, I believe.

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Let's see.

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You know, every two and a half seconds, we call the report voltages to.

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Which then will just carry on taking measurements and then publishing them the code in this callback

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function is identical to the function called report voltages in previous versions of this sketch, and

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that's about it.

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So we've got a new function which will automatically turn off the pump when it's on.

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After five seconds of spinning, of the motor spinning and then of refactored are the part of the code

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so that the report voltages function happens autonomously from the soil humidity function in the last

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thing to do to upload the sketch and make sure that it is still working and that we haven't broken anything.

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OK, so the new sketches uploaded and turn on the power supply to do a bit of testing.

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So you've got the threshold at five hundred and twenty and you've got the soil humidity from the potential

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at 465 comi.

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Turn that up a bit 540.

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And that works.

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And the pump stopped automatically perfect, then go down again and trigger the pump one more time.

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Perfect, it's great.

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So the author of.

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Function is working.

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And everything else in my dashboard is working as well.

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OK?

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Except for the manual pump control, you can see the manual pump control does instruct the pump to turn

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on, but then the MCU itself, the switch that is running on the is pathetic to detect that the threshold

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for the humidity is below what I've said and it will turn off the pump automatically.

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All right.

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So I think that is acceptable.

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Of course, you can get your ISP heritage to allow you to override the pump state with the switch,

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here is something that you can do if you want, but I'm not going to bother with it at this point.