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Let's have a look at the software side of this project in which I have assembled a script using components

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from previous lectures in previous parts of this course in order to create a single script that reads

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environmental data from the sensor, shows it on to the reality display, and then according to conditions,

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it generates an email using if this event that all of those you have already seen is a set in previous

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parts of this course and have simply put them together into a single script.

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Of course, I had to do a few modifications to make everything work well, and I want to now have an

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overlook of what the script looks like.

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I'm not going to go into the details because quite a lot that is happening here and I'm going to leave

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that part a detailed study of the script to you to do at your time.

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Now, remember that this script is a possible version of what this script could look like.

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And there's lots of room for improvement and better organization and better reliability and performance.

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But this is one of my first iterations and it works.

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I just wanted to show you what it looks like now and that from here onwards you can diverge to different

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directions depending on where you want to go with your own projects.

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So let's have a look at it.

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Of course, we've got at the header where we do all of the inputs whenever possible.

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I try to import micro python version of Limberis such as EU Time Here and you, Jason.

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Then I set a number of variables and the objects will be used later on.

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For example, here I've got the ice Quixey object that we're using ID zero, which works with Kypreos

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18 19.

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I've got the display object here and the BMY to the object for the center right there.

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I've also set the PIN object for the ality so that I can turn it on and off when I want to show activity.

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Now up here I've got a bunch of variables that are used to keep track of statuses.

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So for example, I want to know if my gadget has been able to get Internet time and therefore display

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the appropriate time on the day.

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And if it doesn't have Internet time then to show and is not available on the screen.

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So we keep track of that like this.

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And another bunch of variables I have is these relating to the if this index notifications, I've got

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a condition down here.

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I can see that if the temperature is over twenty five degrees centigrade, then I want to send out an

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email notification via if this and that by calling the post it to if this and that routine or function.

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But I don't want to flood my inbox with notifications, so I only want to send those both when the temperature

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is over 25 degrees centigrade.

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But also I've got a counter here and I'm saying here, for example, is totally arbitrary and doesn't

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have to do anything with time.

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But I'm saying send a notification only once every six seconds.

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If a second is the counter that I'm using here or sticking two of them using here in my time r interruptive

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this written down here.

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So you can see I've said the period to one thousand milliseconds.

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So if I leave it at that and that is totally arbitrary, totally up to you.

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How often you want to get a reading from the censors, then this calendar here will result to sending

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at most one notification every six seconds.

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So I probably should not include this appendix here as she just leave it as an counter, perhaps something

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like that.

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Anyway, so they look to you.

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For me, it works just seconds because my timer interrupt period each one second.

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After that, I've got my network, and if this and that credentials file, which is something that you

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have seen before, this file right here, it's got my wi fi name, password and the efficient that key.

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I set up the headers and the Jerrell for this and that, and the post messages sent it through, then

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I create the wireless LAN object here in a set, the type of network that I want to build to an interface

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object or regular interface object.

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And I've got all the various individual functions that make up this project.

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So there's a function that allows my attitude to connect to my local network.

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I've got a disconnect function.

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It simply turns the wireless network off.

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I've got a static screen drawing function.

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Just print out things on the screen that don't change like everything pretty much on the left side of

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the screen function to clear the screen.

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A function to draw things do change.

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In this case, the temperature, humidity, pressure in the time is.

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Also, the notifications text down here down the bottom.

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This shows how many intervals are left before the next notification can be sent via if this in that

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post is a function here called to get Internet time, that is called when the gadget begins executing

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the script.

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And it attempts to synchronize the RTC with Internet time notices that are commented out.

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My custom empty server, and I've just left it up to the module itself, the empty time module to set

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time based on the server that is called the default server that is called in its own code.

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I found that this works more labor than if I said a customer service.

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So I just left it like that to improve reliability.

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This code is familiar to you from the relevant lecture in section of the nine.

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We talked about wi fi.

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Here's a function that makes a post request to efficient that to generate the email notification.

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And finally today, interrupt the service routine here, it will turn the lady on and off when the processing

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begins and ends, then you will call the disconnect function.

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If we don't have a wireless connection, grab the values from the sensor and call the posta.

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If this and that routine sent a post request to if that if this particular condition is true.

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Now, one thing to notice here is that in order for me to be able to do the miracle comparison for the

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temperature floating point number against twenty five, figure out whether it's larger than twenty five,

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I need to convert the string that comes back from the image values.

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This should be in values call.

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It grabs a couple of the values from the sensor and then that's most important assignment into these

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three variables.

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Now temperature ends up holding a string that looks like this.

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So notice that this is not a no.

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It's a string in the end as the centigrade symbol.

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So I want to get this part of this string.

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This is a substring and then convert it into a floating point number with this cast, and then we'll

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be able to do a numerical comparison.

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So to do that, I use the square bracket notation to grab a substring out of the string.

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So here I'm saying go to character index position zero to five to have code zero one, two, three,

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four, five, not included.

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So get this substring.

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From the variable temperatures converted into a floating point number and straight into this variable,

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and then it can make a comparison.

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All right, after that, if this comparison is true, then call the post to if this and that or if Tea

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Party is so verbose and then this will process a post request to efficient that.

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Once it's done, clear the dynamic part of the screen and draw the dynamic part of the screen, pass

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the necessary data.

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The time will be done locally and show the new context of the display and turn off the ability to indicate

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that processing is finished.

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And that's what's happening inside timer.

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I saw.

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Now, this is where the program begins, its execution, when we call it when we run, it will initialize

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a display for it to make sure that its awake will rotated so that we can see the text in the proper

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orientation will draw the static part of the screen, which is this content on the left side.

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Then we'll show that part of the screen.

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The static that we have already drawn will attempt to connect to the local Wi-Fi network called to get

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Internet time retained in order to sink the RTC with the Internet time server and then disconnect.

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So the thing that I decided to do here is to connect only when there is activity that relates to the

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Internet.

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In our case, when we want to sink the clock to the Internet time and when we want to make a post request

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of two, if this is that instead of having a permanently on connection, find that it's both more reliable.

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But it's of course better in terms of power consumption, especially if you power this gadget on battery.

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This is going to significantly improve the longevity of the battery.

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And in this case, it down here right to the bottom, while I'm doing my debugging, instead of having

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the timer here running every one second, which would then have to stop fire control, see, or by clicking

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on the red button and just run the whole thing once I just called.

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Time is a quick one here.

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And then that allows me to just save a bit of time, but not having to hit control, see or the red

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button.

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So I call the timer I saw.

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I just pass an arbitrary number one here because it is expecting a parameter.

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This whole thing will execute once and then we'll will finish.

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We will to do a bit of debugging and then run the script again.

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And when I'm finished with the debugging and I feel confident that the program works, I can switch

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that off these two lines and switch on the lines to four seven two four eight where I set the timer

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and then a trigger sort of starts running and calling the ISO once every second.

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I'm going to execute it in a minute.

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I'm just going to go back and see if there's anything else that is important at this point to mention.

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So in do connect function.

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One thing that I did this time around is to add a little sleep period here.

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I've noticed that when I'm about to connect to the network, very often I had failures.

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I wasn't sure exactly where those failures were, what was causing those failures.

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They error messages coming back, did not provide any reliable hints and noticed that if I added a little

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bit of delay after turning on the wireless interface and then after doing the connection, I noticed

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that this improved the reliability of connected to the Wi-Fi network.

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So that's why I've got these two sleep functions here.

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Let's see, what else do we have?

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This is all pretty straightforward.

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You've seen this before.

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Same thing with getting out any time I noticed that I was getting a little Seijas synchronizing with

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this particular server.

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So I just committed this line off and allowed the set time function of the A.P. time module to just

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use the default host for the Internet server.

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And that seemed like it worked better than me providing my own custom Internet time service.

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So I left it that finally here in the post to this that function using the global keywords to make it

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possible for this function to modify the values stored in these two variables.

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You can see or make some modifications here.

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For example, the if that counter incremented by one.

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And that's why I'm using the global keyword here.

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Another thing to notice is that I assume that when this function is called, the Wi-Fi is not connected

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or the ISP is not connected to my local Wi-Fi network.

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So I'll call the do connect function first, do whatever needs to be done here.

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And then as the last instruction in this function is to disconnect from the local Wi-Fi so that we know

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that when it comes back here, it will need to be reconnected.

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And that's it.

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All right, let's say it's file, it's saved already on the computer, too, and.

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OK, there we go.

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So it worked.

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We've got a temperature updating every one second with the correct time and date as well from the Internet

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clock.

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And you can see that the next update to efficient that or the next post request, if this, in fact,

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will be done in 42 seconds, assuming that the temperature at that time is over 25 degrees centigrade.

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And just looking at.

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My inbox of 22 new messages to get the latest one.

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OK.

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Zero minutes ago, so that this one just came in and got the latest environmental data at this time.

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All right, I'm going to give it another 10 seconds to see what happens when this count expires.

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GRISANTI zero.

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We should get a new e-mail up here any moment, Bill.

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She worked.

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One thing that I need to improve on is the day, the day she turned off, I can see that it is momentarily

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turning off.

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Not sure if it's coming, if that comes through the camera, but it does blink off momentarily.

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So one thing that I need to figure out is how I can make it actually link and stay off in between seconds.

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But I think that the operation that happens every one second takes almost the whole second and therefore

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we don't actually see the tentacles.

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But I can definitely improve that.

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OK, so that's it with this version of the script, this Single-file version.

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Let's move over to the next lecture where I show you how to split this script into two small screens.