Add WIFI to Arduino

1. 1 Introduction skillshare: Hello and welcome to this new course in which I'm going to teach you how to add Wi-Fi, too. Simple Arduino board. In this course, you will learn how you can connect your Arduino microcontroller into a WiFi, would you all? And to make it with enabled, you can turn this symbol Arduino board into an internet of thing device with a few simple steps. Now, for this purpose, we will use our module about a cheap module that costs less than four dollar. And it's called ESP, Ready to 66. It's basically a Wi-Fi mode. You that can provide Wi-Fi capabilities to Arduino board. We want fuse the WiFi Shield because it costs so much and it has limited capabilities. And instead, we're going to use a smaller, cheaper thing to make it were enabled. I know that after this course you will gain a lot of knowledge that will help you start using any Arduino board as an Internet of Thing based microcontroller. Adding this module two, do you know on, on open you more exciting devices, projects, and ideas using the old symbol Arduino on a board or any other board of that matters. Not only thing that you would need is an Arduino board, and I will do, and we'll talk about that in the next lesson. Thanks for watching this lesson. 2. 2 Hardware and Software Requirements: Hello and welcome to this new lesson. You are going to talk about what you will need to make this happen. First, let's talk about the hardware components. You will need an Arduino Uno board, which is basically the main microcontroller in our project. And you'll also need an ESP 266, or it's also called ESP 01. This is a very small simple module that you can find everywhere. And we will need two resistors are ten kilo ohm and the one kiloohm resistor plus wires and RID board for connected. Now, these are the hardware requirements. Let's go to the software requirements. You will only need Arduino. Ide is an integrated development environment, which is basically a software used to program at fixed resource, like a notepad with different features, is used for writing code, compiling the code to check if any errors are there, and uploading the code to the Arduino. We will use our write our code and we will do To the right thing to do while writing this code in a step-by-step manner. As you. Now, these are the hardware and software requirements you need for this course. And you are going to explain how to download and install Arduino IDE and unnecessary files needed to make this work. For watching this lesson. 3. 3 Working Principle: Hello and welcome to this new lesson in which we are going to discuss that process or the working principle. There are a lot of ways to use ESP 8266 to communicate with Arduino board and to have them all together. Some may use it to send and receive data online or simply upload that. For this course, we will just show you how we can communicate to Arduino wirelessly using your smart phone or using any web-based in browser. This will be done either offline or online. Offline using mobile application or online. We observe. Now our ESP eight to six essays will serve as access point. Which means that it will provide access to Wi-Fi and it works for other devices and connects them further to our wire with what? The process is simple. You need to use your phone to send any command to agreeing with the help of ESP a 266. Everything would work by adolescence. So your Arduino board commands from ESP A22 66, and ESPN to 66 will receive commands from new form. This is our phone, but here we have it. This phone will send commands to our BSP board, which is the ESP API to 66. Now the SBA to 66 will send command and I'll read from and 80-66. So this will be our Arduino board. Now, Arduino will persist the message, messages that it receives from the ESP is 66. And we'll execute commands like turning on, building a button, et cetera. While ESPN 266 will send messages to Arduino and Arduino read these messages. And the mobile phone will be used to send string messages via TCP. And we can improve and work on that to make it receive messages from any web browser would be a really easy thing to do. Simply by turning our Wi-Fi on and connecting Arduino to our local Wi-Fi network. And we are going to discuss that as well. That's it. This is the working principle and we are going to explain how to do it. But first we'll start coding process. That's watching this lesson. 4. 4 Circuit Connection: Hello and welcome to this new lesson in which you are going to design our circuit. Now for this purpose, we are going to use Tinkercad, which is basically a circuit design, 3D design, and simulation software that is free to use. First thing, go and look for Tinkercad, then go to the oxide. You can easily create an account by hitting Join now. And you can say that you are an educator student. If you have a student or a teacher e-mail or you can create a personal account. Intrapersonal account is easy using the sign-in with Google or with Apple features. I usually use the sign in with Google feature. If you don't have, you can click on More sign in options and sign-in with Microsoft or with face. If you don't have any of these, you can simply sign up with email. And it will direct you to this page where you have to fill your county, you bear, and click Next, add your e-mail, your password, etc. Now, you won't find the ESP a 266 module on Tinkercad because it's not supported. But I have it here. I managed to import it like with shortcut. So the main idea here is to learn how to connect these components. So I need you to concentrate because failing to connect it that way, I do well result in having your bold maybe burned out or not working at all. So the first step now is to add an Arduino board. Here we have Arduino and let's place it here. Now this is our module. You can rotate the module using this button top-left corner. Let's place it here. And we also need to resistors. This is the first of the store. This is the second resistor. Now we need another resistor down here. Let's rotate. It says now who will starts with connecting the power line? Now, here we have power and here we have the inept. We need to connect them together. We need to take a point and connect it to 3.3 v through a resistor. So let's change the color to red and connect the other side to this area. That's it, shows the color for this as well. Now we have the 3.3 v connected through ten kiloohm resistor. This is a thing kiloohm resistor to fans power and enable lump on three. Now, we need to connect the TX and RX. Tx, which is this pin, can be connected directly to pin number three. Design. And our x can be connected through these two resistors. Let's change the color for that first one, okay? Now this is the dx. Now here we have the RX. We need to connect it to these two resistors. Let's make it green. Now we have connected between the two resistors. The other side of that resistor would be connected to pin number two. Bricks that zine. Now the last step is connecting background. So let's change the color to black. Connect a wire from this bin, which is the ground Ben. Go down and connect it to this resistor. Now, drink a ground pin from here. And let's connect it to the resistor asthma. Now, this is our self connection. We need to make sure that these are one kilo-ohm. And this one is also on kiloohm. Now we have these two pens connected to 3.3 v. We have this pin connected to t x directly. We have this pen. She's hidden, connected to choose the first Spinner Tool resistors and one side, the other side of this resistor is connected. Number two. The other side of this resistor is connected to ground. And that is also grounds connection to the first friend here on the right. So you need to make sure that this print, this print, these pens are connected. The only pens that are not connected data sets that GPIOs zero and GPIO2. These two pens or input output pins, if you want to use this as a standalone microcontroller, you have a course about that. And this rosette pen is used to reset the board and we don't want those. So here's the connection to one kiloohm resistor, 110 kilo-ohm resistor, 3.3 v connected to two pens. Power and enable background is connected to ground then and to the resistor. Now, both of these resistors are connected together and connected to that expand. The other side of this resistor is connected to pin number two and the exponent is connected directly to pin number three. Now, to explain the connection, we can simply see that we are using tenants number 2.3 for the serial communication. And we are connecting power and down to our PSP ball from our Arduino board. That's it. This is how symbol? This. Now if you have any questions about that connection or the circuit schematic, I'm here to help. Now you can see the schematic view by clicking here. And you can see here that we have our green Ono. And because I have another Bolden, same schematic, but it's not shown. You can see it here. But this is basically our schematic abnormal. And here we have a socket. Here we have one kiloohm resistors, that 3.3 volt, and the three bins here. Now for one down here, you can see this is the module has eight pins. We have the tin kiloohm resistor, we have 3.3 v and 2.3. And the ground. This is it. This is our circuit schematic. If you only the list of components, you can see them here. On Wi-Fi, you one kiloohm resistor to bind to kiloohm, not used. And tinker ohm resistor. These three are not used. That's it. This is our design. Thanks for watching this lesson. 5. 5 Free IoT Platform to Visualize Data from Arduino: Hello and welcome to this new lesson in which you are going to talk about the platform that we are going to use to receive data from our web enabled Arduino board. Now, the platform is called Ask sensors.com and it's free to use. That's why we love this platform. Now, this platform will help you get sensors, data on the Cloud, and control actuators easier than ever with the use of web enabled devices like Arduino. If it is connected to Internet, Raspberry Pi, ESP, our boards. It has a user-friendly and easy to use internet of thing interface. Now, the first thing you need to do is to click on get started for free. You will get a list of pricing options. We only need the free plan, which is zero dollar per month. Simply hit the subscribe now can allow you to connect up to two devices. We only need to connect to an Arduino board. And most of the features are available. Now here you need to write your data, your username, your password, and email address. Hey, now you need to choose a password. And then hit I agree. Click Submit. Okay, you can use spaces anyway, that was another password. Now click submit. Save your data just to make sure that you will have it when you need it. They sent you an e-mail, which is a confirmation email. So go and check your email to make sure that you can confirm your account before you start using. Now, as you can see, I already received an email. Is click activate your account. And you should be good to go. Now that comes activated, hit the login button. Now once you have your account, you'll need and you need to take a quick look. On the left here we have devices. Click on it. And as you can see, it's asking you, do you want us since all device or actual device, I will select sensor device. You need to do this and create a new sensor. Now, enter a name, Let's call it green or we can write the description ion. Now, you can add modules. And these modules, you can give them a name, a description, and you can simply hit the edit button to change the module name and description. You can even define the essence of location, latitude, and longitude. And you can enable that show since our location option. Once you are done, click Save, you'll end up with this page. This is our sensor on our device up doing ESP. And here you can see the API key, which is one of the most important things that you need to consider. Because this thing will be used on our Arduino code. As you can see here, you can see the modules that you have assigned. And here we have the API key. So asks and supports communication with all it workable microcontroller, bridges and material with internet connection capabilities such as albino, ESPN to success and other materials. Now, you need to get your API key from your sensor device page, which is basically this key. And the next thing that you need to do is to form the URL. Now as you can see here, we have our API URL. And this is where you should paste your API key. So let's copy it and go to the notepad. Paste it here. Now we have our key or API key here. Now, here comes the modules. The modules are basically the values are that we are sending. I only added one, would you? Because we are only sending one value, let's say on the value from our Arduino Uno. But if you have, let's say 568 or even ten sensors, you can simply keep adding these. What you'll want, equal value one to two, equal value two, and so on. But since I only have one module, I will send only one value, which is this value. Now, keep this link, we will need it. Now. If you want this to have the link, you can simply copy it on the browser and paste it here. And it showed respond with the numbers. And as you can see here, we have one because we have only one module. And this is the value that the April I send to us. So they buy Kias, right? And we can start using it on our Arduino. Now, the next step is to draw our dashboard. Now here we have a dashboard. As you can see, we have custom dashboards and favorite switch. I can go to the custom dashboards. You can create a new dashboard. Now, this feature is available for paid accounts so you can go with their favorite widgets. Now to see the data, we need to visualize it. You need to go back to the devices and sensors or devices. From there, you can click on Visualize. And when you reach this point, you can see that since all tails and modules, now here we have the modules we can easily add I graphed our module. And here it will ask you about the graph details. The x-axis, the y-axis, and the minimum and maximum values. So let's add zero. Let's add date for the x-axis. And the y-axis is add value. Now, we can set the minimum and maximum value. I will leave it. You can save the results here. You can see that the maximum value to, let's say thirsty or 50, depending on what you are sending. You can change the module title with, let's say button. And here you can change line, bar gauge or whatever you want. I will leave it to line, then hit the Save button. And here you are. This is our bathroom graph. You can change this word, sensor or whatever you want. And once or albumin is connected, we can easily see this graph moving. This will be shown on the practical as of now, you can even add alert. So you can enable alerts and you can and get email alerts, your e-mail. If the max threshold exceeded, let's say 25. And you need to check every 15 min or every one day, one week, depending on what your needs. And we will make every 15 min if it's exceeded one. Click save. So now we have a graph, we have an alert, and we have emoji. Now, you can again change the module name or anything you want. You can go back to the essential details here we have them. The API key, and you can add as many modules as you want. As we already mentioned. Can also show the sensor readings on our graph. I like a gauge, but since we only have one with you all, Let's add the sensor and add an imaginary module. Let's call it analog. Hated the name. Call it analog, and save the changes against them, the sensor. Now we have two modules, dot one, so we can add another graph. And from here we can select, let's say gauge. And we can select they're gonna to be bar or series. Yes. So that green, yellow, red is after, let's say 40, and green from zero. Yellow from wanting a minimum value is zero. And green to 1929 yellow, which is the color. And read 4-200 and around value and an axon value of zero or 100. Let's call it a sensor. And hit the save button. Here we have it. We have an analog gauge and a digital graph on the left. This one would be for the temperature. This one will be for the on-off readings that we will receive from Arduino. Now, again, you can even show the sense of location. If you want. You can click Edit sensors and you can add any location. Let's copy the example location from here. It is, and enable the location exception source. Now, Ahmad will show your sense of location here, and as you can see, we have a graphical interface that shows us almost everything. We need to see that the sensor is reading. Since our location, let's say that location is different. It will show on the map as well. And here you can see the exact same location. It is. That's it. This is like a quick walk-through to the asks and so user interface and how you can create sensor device, how you can create modules to get different values from your Arduino or Internet of Things device. If you have any questions or if you fail to do any of the things that we did here, you can leave a question and we are all done happy to help you solve the issue for him. Next, we will code our Arduino board to send data to this button graph, which are basically on-off signals from Arduino pen. But that's it for this lesson. That's rushing. 6. 6 Coding Part1: Welcome to this new lesson in which we are going to start the coding process. Now the first step would be running your Arduino IDE. Now, create a new sketch, which we will use to write our code. Now, we are going to use a library called Software series. So you need to include it. But software serial. Now to configure the serial, we need to define the RX and TX RX and has defined dx. Now, you need to make sure that you have the right numbers. So let's go back to our design. Design. We have this pin, which is the elegant, connected to that green pen, connected to the RX. Now, since this is the t x prime must be connected to our expand on our Arduino. And this is cell communication that receiver will receive from a transmitter. And the transmitter will send or receive. So r is for the receiver, T is for the transplant. So TX pin is connected to pin number three, which is the RAX. So we can go back to our code is pin number three and the other pen is number two, which is the t x that's connected to the RX, as we can see in here. This one is called RX, so it's connected to two, which is dx. Again, you need to understand why we are doing this. Because the receiver needs to be connected to a transmitter and the transmitter needs to be connected to others. Now, the next thing is to start the software Syria. So we will pass the values of TX and RX x dx. Here we are. Now, this is the server configuration lines. The next step is to challenge the user configuration. We need to create a string for the Wi-Fi network. And for the API String SIB. We need another string for that password. Wi-fi network. We also need another string for the IPIP. And for our sense of platform. This is it. These are the three things that we need the user to add. After that, we need to add an alt interval, which is basically to enter file that massive pray that I think operations like constant, unsigned integer, interval equal 185000. Now, this is in milliseconds, so it's about 25 s. The last thing is to define the host and the board for our asks Since or interface or not for string cost. Nick one string port. The port is 80. Host is ABI. Ask sensors com. Now create a new variable, let's call it a t, CMD. Time. Now, AT commands are very common commands in Sierra Communications. And we are going to talk about them and few seconds. Now the second thing is Boolean variable CMD, result equal false. Now, we have that these two variables that we will use with the AT commands. Now, let's move forward to the setup function. And this function is solved Assyria. A baud rate, 9,600, which is the usual thing that we use. What you do and all of our codes. Now, we will use it for debugging and to see what's happening on the background now, right, cereal, brand new line. And let's simply rent a line of stars. Now we need to print another line. And let's say that program started. Let's make it. Then. After that, let's start the AT command and location, which is the software serial communication with our USP it to 66. Katy began at about three to 415,200. Now indicates that we are starting AT command initialization. Initiate commands. Esp 8266 or width. Okay? Now we will send the first AT command using the AT command function. So if I send 80 CMD, this function will take three things. The first thing is a text, which is the API command itself. The second is a number. The third is to say, okay, now we will send another 80 command. This command will include an actual command which is 80 plus C W mode equal one. Now at a semicolon. And let's talk a little bit about these two lines. But after we save our code to make sure that we have in the right place. Now here we have a list of AT commands. Let's take a quick look at this. This list. As you can see, 80 plus RST. Start the module. 80-plus CW. Cw wounds will basically help you choose the Wi-Fi moons. 80-plus CW. Jab will join an access point. The access point will list all access points. Q access point will quit your access point. And we have other commands like CIP status will get status of the TCP IP protocol. Cip starts. We'll help you sit up TCP or UDP protocols. Cip send will help you send that. Cib close will help you close TCP or UDP. Ci LFSR will help you get the IP and be MUX will help you set multiple connections. And we also have CIP server, which will help you sit as altered your device ourselves. This is a list of the ethic months, and we already used one of them. So let's say this CW mode, which is basically to set the Wi-Fi want. Before moving forward. The first command AT will help the device recognize that who will send ATP? Now, the second thing is sending the actual command to set the mood for our WiFi. Would you? Now, let's talk about the function itself. The AT command function. The synthetic month function will send these 18 months. And this function is not written yet. So let's go ahead and dry goods. Go and write void, send, 80, CMD. Now the first thing that we need to know about this function is the fact that it doesn't return anything. It will take a string, which is basically the AT command, will also take an integer, which is the AT command max time. And it will take an array of character, which is basically another string, which is that Aedes. The plane. Now, these are the three things that this function will take. The first thing that we'll do when we enter this function is we will print. So print command. And after that, we will print the actual commands. So this is just debugging. So we are just painting on the serial monitor. So here we will print cmd, which is the incoming command that we will use. Now, we need to make sure that sending or receiving data command does not exceed a specific amount of time, which is a, T, C and D max time, otherwise we have a problem. So write a while loop to make sure that we do not exceed this time. Now inside the while loop, you need to write 80 CMD. Time is below 80 CMD max time. Now, the CMD time, you must not exceed the maximum time entered by the user. Otherwise, there is a problem. Now, once we go inside this loop, we need to write the command AT rent. Here we would write cmd command itself. After that, we will check if now inside this if statement, what we need to do. Now inside this if statement, you need to know that I knew that AT commands that we send, if it is executed successfully, it will respond with, okay, so just to look up Spokane, so we need to make sure that we are receiving this. Okay? So like AT dot find, this find will take that read reply. Now after that, inside the if statement, we will write this 80 cmd. The result equal. We initialize this variable to be false to make sure that when we are first getting started, it will only return true if we receive the okay After that, the AT command. If this is the case, then break. Get outside of this. Once you have done, We need you to increase the AT command type, CMD. Sorry, timeless. Now that interplay here, we reply is basically reading this, okay? Again, if you received okay, it means that everything is going just fine. Now, going back to this function, we are done with the while loop. You need to bran cereal, then that is a result. And we will, for printing the results, we need to make sure that is man was sent successfully using this line AT CMB results. So if the CMD result equal, equal the room, then in this case, we need to bran cereal brands. And I'm done. That means that everything is done correctly. So 80 CMD time, we'll be all set to zero because we are done with this. Let's say liberal on this sending operation. Now, if it is false, CMD result is false. This is false. We need to print failed. And we will also set this cmd time to zero. Now once we are done, and if it is a successful operation, it is and the result is true, we need to reset it back to false. So after this if statement and for the end of our function, we need to write 80 CMD. Result equal false. That's it. This is our eighties and Command, or send 80 command function. Now in the next lesson we'll proceed with writing the code. This is like going for a very long time. Now, we're all about 16 min of this lesson. So without further notes, if you need any help with any of these lines, I'll be more than happy to explain it to you in more details. But that's it. This is the first part of our code. Next, we will finish the setup function and we'll go for the blue function. Thanks for watching this lesson. 7. 7 Coding Part2: Hello and welcome to this new lesson in which we're going to proceed with that coding of our Arduino to make sure that it can communicate with ESP to 66. Now, we are done with setting the Wi-Fi moods. The next step is connecting to Wi-Fi. So let's inform the user that we are connecting Wi-Fi. And let's run the wildfire name, SSID. And let's send the AT command to connect to Wi-Fi. And the command goes as this first unit, right? Kt plus C w j AB, or join access point, which is basically the lists that we mentioned on the previous lesson, list of commands. After that we need to write equal backslash and we need to add another text. So here we need to add a plus sign. Now, after writing the plus sign, like SSID, another plus sign to add backslash. And then another backslash. Double quotation twice, then last password plus backslash, double patient. Another comma. Another comma. Okay? Which is the takes that if we receive means that we have connected successful. Now, let's review this line. 80 plus TW join ACS is point equal backslash, double quotation, twice. Blessed, SSID blas, backslash between debilitation, a comma, then backslash, double quotations plus password plus backslash between two double mutations than either single or double quotation. Coma 20 comma between two double quotations. If you have send this, then we are done with the setup function and we need to go to the loop function. Let's save our code. Now inside the loop, we need to create the URL for the request. Now to create the URL, first, we need to create a string, call it URL, equal to that reputation. Get the bytes. After that. You need to append the next string to this. You all right, You are equal. The first thing that we will append is that API key that we will add. Another plus equal. Now here and a question mark, number one equal. Now, as you can see, you can add the numbers. You can add a random value between, let's say 1,000 last week, what runs on ten? And the hand. So this will be the format hardware will include the height API key N, or the old one. And an ambush, which is basically 012. And we already assigned the number to be 10-100, which will be a random value. Now once you're done with that, we need to print something, the user to tell him that we are still here. So cereal, the brand new line. Now, again, serial print, new line. In here. We need to tell the user that we are opening ECB connection. Now we will send commands to open disconnections. So send three commands. The first one will be 80 command plus CIB MUX equal one. The time is ten and the return is okay. After that, we will send another command, CMD. Again. Man is 80 plus c equals zero. And after that, we need to send backslash, TCB and capital. And another backslash and a semicolon, or a semi or a coma, sorry. Now after that comma, we need to add another backslash and to double quotations, blasts, blasts. Another backslash. After that, add a comma, single quotation or double quotation. And plus the port number, the time, which is 20, and the reply which pushes, which is okay. So this will make sure that we are connecting to the host. This portion and the host on the board are basically values that we already created here, which is the asks and social platform. And it's formed. Now once we are done with that, if we got an okay means that we have successfully connected. So we need to send something, send commands. We already have the answer. We need to initiate the send. Cip send equals zero. Now, before the end, add a comma. Now what we need to do is to add the string. So string length plus four and add a comma ten, which is the time another Homer. The sign, which is great. Now we will send the printing, are requesting you are to the user to tell him where we are right now. So serial print LN. Now someone might ask, should I like memorise all of this, or should I know all of this? No. You can simply copy the whole code and paste it on your Arduino, upload it to your Arduino and start using the project or the app greener, but connected to the Internet. But we'd like to explain every piece of detail because this is what our students are expecting from us and this is the right thing to do. You need to know if the read line of code whites here while you are writing it. And why you need to write. This is simply user that we are requesting URL. Now, we will print they are all on the serial monitor. So Serial.print. You are on. Now 80 the n. We will send the URL to them as an ethical manner. Now after that, this other delay, for this to stabilize 2 s delay on top, then we need to close the connection AT CMD. And in here died AT last. Cip laws equal zero. Then k. Now let's tell the user that we just close the TCP connection. So phase these two lines here. Tcp, TCP connection closed. Now after doing that, simply, another line of starves and add a delay, which is basically the right interval the day. As you can see, the lane right. Now, That's it. This is our code. And what you need to do at this point is to go up here to change that API key in with your device from the asks and soles interface. Landfall. We already have this here. So I will just copy the API key. And simply get it from here. I can go back here, paste it. Now, you need to write this as ID and the password. Now someone might ask, where are the values that I'm sending to our sensors platform? Which is a good question. Now if you scroll down here, you can see that in here these are the values or the random values that we are sending. These can be seen as central value. So you can replace this line with you can commit it and replace it with you or Alt plus equal temperature sensor. And it will send a temperature sensor, sensor values to that platform. It can be a batch. One. Value will send the pattern of value to the platform and you will be able to visualize it. But we are sending a random value each time, 10-100, to see the values on the graph moving. And here is the graph that I'm talking about. Let me open it. Here's the graph that we're talking about. Now we can even change the subgraph to match that ten to 100 values. So it, it charged to keep it. Let's give it a line between 1,000 and hit the save button. And we will see the values here once they are coming in. Now, as you can see, between ten and they will keep moving. Now it won't be a baton value to be at random. So let's change again random value. But again, you can change it with any other thing. Simply change this line of code, this slide, remove this and add whatever you want here. Now if you want to add another module, you can, you can simply do that by copying these two lines and pasting them here. And add module two. And the values here. Then Add Module three values here. So it will be censored one, since there's two or three, and so on. And you also need to change the SSID and password for your WiFi network for uploading the code and make sure that you have these numbers. And that item. We will provide the full code. And if you did everything just like what we do, what we did here. You can easily get your Arduino connected to Wi-Fi and sending values for the platform. Now, we will save the code, we will add that SSID and password. In the next lesson, we will upload the code to our Arduino board. And the final lesson, we will test this out. Thanks for watching this lesson.