1 00:00:00,570 --> 00:00:06,390 Now we need to declare an object of Observer Library so we can access its functions. 2 00:00:07,020 --> 00:00:14,820 The constructor of the object to export were the server will be listening to as a parameter since 80 3 00:00:15,210 --> 00:00:17,850 is the default port for HDTV requests. 4 00:00:18,330 --> 00:00:24,870 We will use this value and you can easily do that by writing this very simple line. 5 00:00:27,790 --> 00:00:30,370 Before the setup method, what to observer 6 00:00:33,460 --> 00:00:46,450 and it should be called webserver server, and at 80, yeah, so we have declared an object from the 7 00:00:46,450 --> 00:00:49,970 observer with this part. 8 00:00:50,170 --> 00:00:52,420 Eighty four request. 9 00:00:53,620 --> 00:01:00,670 Next, we declare that yes, we have 32 general purpose input output pins to which lids are connected 10 00:01:01,210 --> 00:01:03,730 and we are going to set that initial state. 11 00:01:06,220 --> 00:01:12,810 Now, do that sort of the setup method define an integer? 12 00:01:17,480 --> 00:01:18,590 And call it led. 13 00:01:19,670 --> 00:01:29,510 And one and we already know that we have connected the to pin number two and five. 14 00:01:31,300 --> 00:01:39,430 So we would like to hear the same line will be retained for bill number five. 15 00:01:43,460 --> 00:01:44,390 For the second. 16 00:01:45,380 --> 00:01:45,800 Let. 17 00:01:47,610 --> 00:01:54,600 Now, let's give them initial value led one status. 18 00:01:56,930 --> 00:02:02,120 Turn it off low and same thing for little. 19 00:02:04,670 --> 00:02:05,450 Make it law. 20 00:02:06,470 --> 00:02:13,760 OK, now that we have furnished everything before the setup method, we will go back to our wireless 21 00:02:13,760 --> 00:02:15,470 network name and password. 22 00:02:16,700 --> 00:02:19,190 Let's move on to the setup function. 23 00:02:20,390 --> 00:02:25,760 Well, going to configure our H2B request or server before actually running it. 24 00:02:26,150 --> 00:02:33,220 First of all, we open a serial connection for debugging purposes and we are going to set general purpose 25 00:02:33,230 --> 00:02:41,390 input output ports to output because they are basically LEDs and we are going to control them as outputs. 26 00:02:42,260 --> 00:02:49,490 So inside the setup by Serial to begin and use and moderate. 27 00:02:53,290 --> 00:03:03,160 Next, Penaud, just lighting an Arduino, and we are going to either take the print name lid pin one 28 00:03:04,630 --> 00:03:06,280 and make it output. 29 00:03:07,990 --> 00:03:15,460 Same thing for the second pen and two, it will be treated as outputs. 30 00:03:16,240 --> 00:03:23,930 Then we are going to set up a soft access point to establish our Wi-Fi network by providing that I.D. 31 00:03:24,190 --> 00:03:31,720 password, IP address, IP subnet mask and IP Gateway, which are basically this information that we 32 00:03:31,720 --> 00:03:33,430 provided or we added here. 33 00:03:34,780 --> 00:03:40,840 To do that, what you need to do inside the setup method is like Wi-Fi. 34 00:03:44,330 --> 00:03:45,830 Not soft. 35 00:03:47,710 --> 00:03:48,290 AP. 36 00:03:49,660 --> 00:03:51,960 And this will take two parameters. 37 00:03:52,420 --> 00:04:06,100 This aside, the passport, then try to qualify the soft AP config, and it will take three parameters 38 00:04:07,000 --> 00:04:14,860 the local IP gateway, the subnet. 39 00:04:17,870 --> 00:04:23,960 After that, you can't add a delay to make sure that everything is stable. 40 00:04:26,350 --> 00:04:27,940 Now that's it. 41 00:04:28,420 --> 00:04:31,090 Let's verify to make sure that we don't have rules. 42 00:04:33,370 --> 00:04:40,480 I'd like to find a villain then to make sure that if there is an error, I can fix it when it happened. 43 00:04:42,400 --> 00:04:44,530 OK, Duncan Bilang, we don't have any rules. 44 00:04:46,270 --> 00:04:53,410 Now we come to the most important part of this code in order to handle incoming entry requests. 45 00:04:53,440 --> 00:04:59,470 We need to specify which code to execute went up articulate well on his hit. 46 00:05:00,370 --> 00:05:02,890 To do so, we use on method. 47 00:05:03,730 --> 00:05:05,530 This method takes two parameters. 48 00:05:05,770 --> 00:05:14,440 First, one is a real path and second one is dynamic of function, which we want to execute when that 49 00:05:14,440 --> 00:05:15,520 you are always hit. 50 00:05:16,540 --> 00:05:17,350 For example. 51 00:05:18,570 --> 00:05:23,310 Let's try to write one line on that, explain it as we write it. 52 00:05:23,790 --> 00:05:24,600 Let's hear what. 53 00:05:26,370 --> 00:05:27,960 Not on. 54 00:05:29,990 --> 00:05:36,770 Now open to parentheses, the first part of that will take. 55 00:05:38,450 --> 00:05:43,410 Is this large and you need to write Comma? 56 00:05:44,000 --> 00:05:50,870 Then why the method name that will take control when something's happened? 57 00:05:53,880 --> 00:05:56,640 OK, now this line. 58 00:05:58,550 --> 00:06:05,780 When a server receives an entity built on the path, it will trigger the handle connect. 59 00:06:07,530 --> 00:06:12,360 Function, not that they are specified is our relative path. 60 00:06:13,710 --> 00:06:16,750 Likewise, we can do the same for other URLs. 61 00:06:19,200 --> 00:06:28,920 We call it here led one on and we can name the function led one on. 62 00:06:30,840 --> 00:06:34,880 Same for other lives server on. 63 00:06:37,110 --> 00:06:39,570 And we are going to try different values here. 64 00:06:40,110 --> 00:06:48,720 Slash led one off and handle led one off. 65 00:06:50,100 --> 00:06:54,900 Same for led to a lot of going to change. 66 00:06:54,900 --> 00:06:56,920 This led to little. 67 00:06:57,870 --> 00:07:05,300 And same for here led to led to just to save time and to make sure that we don't care about lighting 68 00:07:05,310 --> 00:07:05,640 now. 69 00:07:06,210 --> 00:07:07,380 What will happen here? 70 00:07:07,770 --> 00:07:11,640 Whenever you light the IP, address this one. 71 00:07:12,210 --> 00:07:18,840 Let's say that you and your browser, I will give you an example 180 to 168 one 0.10. 72 00:07:19,320 --> 00:07:21,330 And you write this slash. 73 00:07:21,840 --> 00:07:26,490 When they ask people to receive this request, it will run this method. 74 00:07:27,360 --> 00:07:34,290 Now, if you write one on it will execute this method and you are going to like this method. 75 00:07:34,710 --> 00:07:37,590 Methods in the loop section. 76 00:07:38,750 --> 00:07:41,360 But for now, this is what I need you to understand. 77 00:07:42,170 --> 00:07:48,920 Now we haven't specified what the server should do if the client requests and you are other than the 78 00:07:48,920 --> 00:07:58,720 specified with server on either of these, it should respond with an issue with status 404 error, which 79 00:07:58,730 --> 00:08:03,320 is basically not found page and a message for the user. 80 00:08:03,920 --> 00:08:17,060 We put this in a function as well, and we can easily do that by writing Server Dot on not found, which 81 00:08:17,060 --> 00:08:20,510 is one of the functions that we can easily use. 82 00:08:21,080 --> 00:08:22,880 Here you need to write the name of the function. 83 00:08:23,120 --> 00:08:23,780 Don't take. 84 00:08:24,050 --> 00:08:25,430 It will take only one parameter. 85 00:08:26,570 --> 00:08:29,690 So not found. 86 00:08:30,830 --> 00:08:31,190 OK. 87 00:08:33,140 --> 00:08:33,620 Now. 88 00:08:35,260 --> 00:08:39,580 To start ourselves what we need to write server to begin. 89 00:08:42,280 --> 00:08:51,100 And on tech and parameters, and we can fight a line and the CO2 monitor to make sure that it will show 90 00:08:51,100 --> 00:08:54,450 us Sarah has started OK. 91 00:08:55,360 --> 00:08:59,710 A.B. Silva has started. 92 00:09:02,660 --> 00:09:05,610 This is how to start your server once you finish the configuration. 93 00:09:05,630 --> 00:09:08,630 Now let's make a quick review of what we have done here. 94 00:09:10,790 --> 00:09:18,500 We initialized the soft access point mode and gave it to parameters, the Wi-Fi network name and the 95 00:09:18,500 --> 00:09:24,140 password, and we gave it the local IP getaway on subnet mask. 96 00:09:24,830 --> 00:09:27,890 Then we had a delay to make sure that everything is stable. 97 00:09:28,490 --> 00:09:30,560 After that, we wrote these lines. 98 00:09:32,800 --> 00:09:39,250 The surfer looked on will take two parameters first parameter is they are all on the second parameter 99 00:09:39,250 --> 00:09:39,970 is the method. 100 00:09:40,420 --> 00:09:44,020 So when someone requests the manual, this one. 101 00:09:45,390 --> 00:09:51,660 It will call the handle on connect method, and when someone lights lit one, when someone calls this 102 00:09:51,660 --> 00:09:57,570 real, it will call this method and we are going to create these methods in the loop section. 103 00:09:59,350 --> 00:10:05,260 But what you need to know now is that you can add more your allies and more requests. 104 00:10:05,620 --> 00:10:12,790 And if someone until you are all that you haven't set here, you can direct him to handle not found 105 00:10:13,750 --> 00:10:16,000 methods on not found. 106 00:10:17,000 --> 00:10:25,430 Now, to solve the server like terror begin, then serial dot print line and apply this line and the 107 00:10:25,430 --> 00:10:28,340 settlement or indicating that the server has started. 108 00:10:29,030 --> 00:10:29,960 Let's verify. 109 00:10:36,370 --> 00:10:43,360 OK, now we have problem, which is hand-held internet was not declared, which means that this method 110 00:10:43,870 --> 00:10:47,560 was not yet declared and we haven't yet declared anything in the loop section. 111 00:10:47,560 --> 00:10:50,350 So this is an area that we can't ignore. 112 00:10:50,860 --> 00:10:55,600 And in the next lesson, we are going to start writing the code inside a loop section. 113 00:10:56,290 --> 00:10:57,100 That's it for now. 114 00:10:57,130 --> 00:10:57,940 Thanks for watching. 115 00:10:57,970 --> 00:11:01,300 This is Ashraf from educational engineering team.