1 00:00:00,330 --> 00:00:02,970 Now let's get started on coding our drones. 2 00:00:02,970 --> 00:00:09,300 First I want to talk about how we can connect the drone and your computer on the right side is an image 3 00:00:09,300 --> 00:00:15,600 of how your drone and computer will be connected on the left side you will see the Tello document to 4 00:00:15,600 --> 00:00:17,870 send commands and receive responses. 5 00:00:17,870 --> 00:00:25,290 The IP address will be one ninety two point one sixty eight point ten point one with the port number 6 00:00:25,380 --> 00:00:27,320 eight eight eight nine. 7 00:00:27,510 --> 00:00:30,460 There are three ways to connect with the drone. 8 00:00:30,810 --> 00:00:34,220 The drone IP address is a fixed IP. 9 00:00:34,440 --> 00:00:41,910 Once your laptop is connected on Wi-Fi the IP will be a one ninety two point one sixty eight point ten 10 00:00:42,000 --> 00:00:46,110 point two to make your drone take off or land. 11 00:00:46,170 --> 00:00:51,040 You will need to use the port number eight eight eight nine. 12 00:00:51,330 --> 00:00:58,170 Once the drone accepts the commands it will respond using the same port number eight eight nine. 13 00:00:58,170 --> 00:01:03,400 This first two way connection is written in the top part of the document. 14 00:01:03,540 --> 00:01:07,430 The next connection here is where the drone sends you its status. 15 00:01:07,470 --> 00:01:13,230 The drone will be sending you its steps constantly using the port number 8 8 9 0. 16 00:01:13,260 --> 00:01:16,160 The third connection is for video streaming. 17 00:01:16,200 --> 00:01:24,280 The drone will be sending the video binary using the UDP port number 1 1 1 1 we will mainly be using 18 00:01:24,280 --> 00:01:29,220 the first connection to send commands and to receive response. 19 00:01:29,290 --> 00:01:31,680 We will not be using the second connection. 20 00:01:31,930 --> 00:01:37,180 The drone will be sending life stats which will be massive information. 21 00:01:37,180 --> 00:01:43,030 These information can be used for debugging or when you want to operate your drone with more detail. 22 00:01:43,390 --> 00:01:49,570 When it comes to simple programming your own drone you wouldn't need to use it much. 23 00:01:49,680 --> 00:01:54,090 We will definitely be using the third connection for face recognition. 24 00:01:54,120 --> 00:01:58,010 So in this course we'll be using the first and third connection. 25 00:01:58,080 --> 00:02:03,990 It's always good to have an image in your head before you go into coding it clear your mind. 26 00:02:03,990 --> 00:02:09,080 Now it's time to get into the programming in our previous lesson. 27 00:02:09,100 --> 00:02:12,470 We were using a file we created in the tools directory. 28 00:02:12,850 --> 00:02:14,860 We want to start with a fresh new project. 29 00:02:15,370 --> 00:02:22,820 So right click on the director early P Y Tello G is new and click on python file. 30 00:02:22,870 --> 00:02:29,140 Let's set the file name to drone manager and hit OK as we've created a new file. 31 00:02:29,140 --> 00:02:30,740 We need to go to the go button. 32 00:02:30,820 --> 00:02:35,350 Open edit configurations and change the path to the file name. 33 00:02:35,440 --> 00:02:43,170 We just created drone manager I'll minimize the project tab here. 34 00:02:43,170 --> 00:02:46,180 Let's start by importing the libraries we need. 35 00:02:46,320 --> 00:02:48,230 First we import logging. 36 00:02:48,420 --> 00:02:50,670 We need socket to connect. 37 00:02:50,670 --> 00:02:53,160 We'll be using a C.D. out when logging. 38 00:02:53,160 --> 00:02:59,440 So we need to import sis also we will be using time. 39 00:02:59,610 --> 00:03:06,030 We will start setting longings before we start I want you to understand that I may not be following 40 00:03:06,030 --> 00:03:11,100 the PIP 8 format or falling out of the Python code style sometimes. 41 00:03:11,190 --> 00:03:17,480 For example when we start setting logging we need to set two blank lines after the import. 42 00:03:17,820 --> 00:03:23,670 But if I use up two lines it may be hard to fit all the codes in the screen for you to understand the 43 00:03:23,670 --> 00:03:25,040 whole script. 44 00:03:25,080 --> 00:03:30,870 So due to these reasons I may be cutting out some blank lines or spaces. 45 00:03:30,870 --> 00:03:38,250 Now back to the code we set the logging level to info and stream will be set to this DUCs as G.D. out 46 00:03:38,580 --> 00:03:43,820 so we can have the log data shown on the console. 47 00:03:43,860 --> 00:03:49,950 This will be a single file so we wouldn't be needing a logger but we will be moving this file to a different 48 00:03:49,950 --> 00:03:51,800 folder to use in the framework. 49 00:03:51,900 --> 00:03:58,480 So we'll set the logger and use get logger with double underscored me. 50 00:03:58,500 --> 00:04:00,510 Next we create a class. 51 00:04:00,510 --> 00:04:07,950 This will be used to manage your drone from your laptop so we want to name the class drone manager and 52 00:04:07,960 --> 00:04:11,770 set object for that in it. 53 00:04:11,770 --> 00:04:18,130 We need to set the argument with the laptop IP which was one ninety two point one sixty eight point 54 00:04:18,130 --> 00:04:23,030 ten point two and the port number eight nine. 55 00:04:23,080 --> 00:04:30,460 The drone IP is a fixed IP which was one ninety two point one sixty eight point ten point one and the 56 00:04:30,460 --> 00:04:33,160 port number eighty nine. 57 00:04:33,250 --> 00:04:36,960 Let's set the host IP in the class so we can use it later on. 58 00:04:37,900 --> 00:04:47,890 Self host IP HOST PORT grown IP and drone port we will be using the drone address a lot. 59 00:04:47,920 --> 00:04:55,470 So let's set the drone address with drone IP and drone port as a tuple type when using send to. 60 00:04:55,480 --> 00:04:56,440 With sockets. 61 00:04:56,470 --> 00:04:59,940 It's easier to have the drone address in a tuple type. 62 00:04:59,950 --> 00:05:05,930 Now we create a socket self socket equals socket socket. 63 00:05:06,040 --> 00:05:12,920 The first argument will be socket a f in it for the second argument. 64 00:05:13,020 --> 00:05:21,730 Since we're using UDP we'll set SOC data room for those of you who want to know more about socket. 65 00:05:21,780 --> 00:05:30,150 You can copy paste SOC diagram and google search for more information once we create a self socket. 66 00:05:30,150 --> 00:05:39,670 We need to bind it we'll set saw self host IP and self host port to bind it in a tuple type now we'll 67 00:05:39,670 --> 00:05:42,290 be sending commands before that. 68 00:05:42,290 --> 00:05:44,990 Let's go back to the drone document. 69 00:05:45,030 --> 00:05:49,390 I want you to look at the Sen command and receive response part. 70 00:05:49,500 --> 00:05:56,070 It says that we need to send a text command to the drone to start the communication between your laptop 71 00:05:56,160 --> 00:05:57,990 and your drone. 72 00:05:57,990 --> 00:06:03,630 Again we need to send command to the drone to initialize. 73 00:06:03,650 --> 00:06:06,740 Now let's get the second part and go onto the third part. 74 00:06:06,740 --> 00:06:12,110 We also need to send the text stream on to start receiving the video. 75 00:06:12,110 --> 00:06:20,090 Let's go back and send the two texts to the drone in a binary through UDP connection to send the two 76 00:06:20,090 --> 00:06:26,210 words reset socket send to and B which stands for binary. 77 00:06:26,210 --> 00:06:28,260 And the text command. 78 00:06:28,320 --> 00:06:31,550 Next we need to set where we send this text. 79 00:06:31,600 --> 00:06:34,070 It'll be the self drone address. 80 00:06:34,440 --> 00:06:38,520 We repeat the code so we can also send stream on. 81 00:06:38,630 --> 00:06:41,870 Now we've completed the initialization. 82 00:06:41,970 --> 00:06:51,030 Let's go on and create as destructor define double underscored Dell and self when the classes deleted 83 00:06:51,030 --> 00:06:59,310 from the memory or if we forget to delete this self stop method will be invoked and the self stop method 84 00:06:59,580 --> 00:07:01,490 will set the self socket to close 85 00:07:04,250 --> 00:07:10,430 to make things easier I want to create a method that can receive the take off or land commands let's 86 00:07:10,430 --> 00:07:17,540 name the self command method and set argument to command take off or land commands will be set in this 87 00:07:17,540 --> 00:07:22,100 command argument as a string type for all the commands sent. 88 00:07:22,100 --> 00:07:30,370 We want to leave a log so let's set a logger followed by a dictionary type action will be send command 89 00:07:30,700 --> 00:07:35,930 and command will be the name that commands. 90 00:07:35,980 --> 00:07:39,400 Now we set self socket send to. 91 00:07:39,460 --> 00:07:41,520 We want to have the command and string type. 92 00:07:41,520 --> 00:07:46,630 So we need to encode UTF 8 and we send this to the drone. 93 00:07:46,690 --> 00:07:53,560 So we set the self drone address here we've completed a method to send the commands to the drone as 94 00:07:53,560 --> 00:07:56,030 a binary. 95 00:07:56,110 --> 00:08:03,340 Next we create a takeoff method we set to send command takeoff as written in the document. 96 00:08:03,340 --> 00:08:06,670 Let's do the same for landing command was land 97 00:08:12,350 --> 00:08:19,220 here we've programmed the drone to initialize and the basic commands as take off and land. 98 00:08:19,220 --> 00:08:22,520 Lastly we need to set an if statement. 99 00:08:22,970 --> 00:08:28,130 Once this python code is invoked we want to run this code. 100 00:08:28,130 --> 00:08:38,090 If underscore name is made now we create a drone manager and initialize then set the drone to take off. 101 00:08:39,520 --> 00:08:46,120 We'll set a time manager time sleep to 10 so that the drone will be in the air for 10 seconds. 102 00:08:46,120 --> 00:08:48,790 Then we set the drone to land. 103 00:08:48,820 --> 00:08:51,820 Now it's the moment we all waited for. 104 00:08:51,910 --> 00:08:57,610 Let's run this code and watch the drone fly push the power button on your drone. 105 00:08:57,750 --> 00:09:00,350 Once you see the light flashing on your drone. 106 00:09:00,450 --> 00:09:03,330 Place it in a safe area. 107 00:09:03,360 --> 00:09:10,080 Now we need to connect the drone to Wi-Fi click on the Wi-Fi icon and choose your telco to connect to 108 00:09:10,080 --> 00:09:11,900 Wi-Fi. 109 00:09:11,900 --> 00:09:15,620 Now we are ready to run the code as we run the code. 110 00:09:15,620 --> 00:09:23,690 You can see the drone take off on your right side of the screen you will see the log data the log starts 111 00:09:23,690 --> 00:09:25,260 with the takeoff command. 112 00:09:25,520 --> 00:09:32,600 Once 10 seconds passes you will see the land command and the drone lands. 113 00:09:32,770 --> 00:09:35,690 So how did your drone do. 114 00:09:35,710 --> 00:09:37,820 Were you able to fly your drone. 115 00:09:38,410 --> 00:09:44,380 If an error occurred and your drone didn't fly your drone may automatically shut down while you are 116 00:09:44,380 --> 00:09:46,250 searching for the air. 117 00:09:46,330 --> 00:09:52,240 In that case remember to reconnect the drone onto your Wi-Fi before you run the code. 118 00:09:53,460 --> 00:09:54,390 OK. 119 00:09:54,670 --> 00:09:57,380 Congratulations on your first flight. 120 00:09:57,460 --> 00:10:00,730 I'll see you in our next lesson for more drone programming.