WEBVTT 00:00.050 --> 00:05.750 This is the solution of the previous activity where you have to take a photo every two seconds on the 00:05.750 --> 00:11.960 Raspberry Pi and then send the photo when you request it, either from Telegram or from the Arduino. 00:12.320 --> 00:14.900 And let's start with this Arduino code, actually. 00:14.900 --> 00:18.590 And well, this code, we've already done that multiple times. 00:18.590 --> 00:24.590 So I'm going to open activity number six, for example. 00:25.070 --> 00:29.420 And on the activity number six, I have the code to read from the push button. 00:29.420 --> 00:31.130 I'm just going to copy this. 00:32.460 --> 00:38.280 And put that here and I'm just going to remove what I don't need. 00:38.850 --> 00:44.520 So we were using the servo motor, but I'm not going to use Servo here, just the push button. 00:45.670 --> 00:47.350 So I'm going to remove that. 00:47.800 --> 00:51.280 I'm going to keep the sire, of course, with this baud rate. 00:51.490 --> 00:54.250 And then I'm going to remove this part. 00:56.130 --> 01:00.710 So as you can see, with all the code that we did is quite module able. 01:00.720 --> 01:05.610 Okay, We can just take some parts, remove some other parts and it's quite easy. 01:05.610 --> 01:12.600 And now when we have the complete code to read from the push button and send button pressed when the 01:12.600 --> 01:15.430 button has been pressed with the debounce mechanism. 01:15.450 --> 01:15.990 Okay. 01:16.320 --> 01:20.280 I am going to upload this to the Arduino directly. 01:21.420 --> 01:23.550 Activity nine. 01:25.410 --> 01:26.460 Let's upload. 01:28.470 --> 01:34.650 And what can't open with my Arduino is not plugged to a Raspberry Pi. 01:35.130 --> 01:37.200 So that's not going to work. 01:38.630 --> 01:39.440 You can see now. 01:39.440 --> 01:41.600 Okay, That's something very interesting. 01:41.690 --> 01:44.450 This time I don't have t zero. 01:44.480 --> 01:46.820 I have t one. 01:47.000 --> 01:53.390 Okay, let's try to disconnect again and connect back. 01:53.990 --> 01:56.240 Let's see again what we have. 01:56.510 --> 02:02.930 And we still have ACM one, so I'm going to use ACM one and that's something to know when we try to 02:02.930 --> 02:04.220 connect from the Raspberry Pi. 02:04.250 --> 02:04.790 Okay. 02:05.120 --> 02:07.250 So upload. 02:10.210 --> 02:11.470 Down uploading. 02:11.470 --> 02:13.960 Let's just check that. 02:13.960 --> 02:18.040 If I press on the push button, I get button pressed. 02:18.070 --> 02:19.510 That's correct. 02:19.630 --> 02:22.060 Now let's go to the Raspberry Pi side. 02:22.060 --> 02:23.530 So we need to do a few things. 02:23.530 --> 02:27.490 We need to read the file to get the push button notification. 02:27.490 --> 02:34.120 We need to take a photo every two seconds and we need to also send it to Telegram and receive callbacks 02:34.120 --> 02:34.990 from Telegram. 02:35.560 --> 02:37.360 Let's do the first thing here. 02:37.360 --> 02:39.670 Maybe to take a photo every two seconds. 02:40.330 --> 02:41.620 I'm going to remove that. 02:46.990 --> 02:57.940 Okay, let's import So from pi camera import pi camera like this and then let's create a camera. 02:57.940 --> 03:02.200 So camera is equal to pi camera. 03:02.230 --> 03:04.240 Let's put the settings directly. 03:04.810 --> 03:06.640 Camera, dot. 03:07.660 --> 03:15.760 Resolution and I'm going to use a quite small one because, well, we don't need more actually, for 03:15.760 --> 03:25.630 what we want to do in camera dot rotation is equal to 180 because I have seen before that the images 03:25.630 --> 03:27.690 I take are upside down. 03:27.700 --> 03:32.740 So check that for yourself before and then maybe use the camera dot rotation setting. 03:32.740 --> 03:41.980 Let's add an image folder name, which is slash home slash pie slash camera. 03:41.980 --> 03:45.640 Okay, let's actually go in the file manager and see. 03:46.000 --> 03:53.620 We have the camera folder here already with new image and new image too. 03:53.650 --> 03:55.660 Well, let's keep this like that. 03:56.260 --> 04:02.380 So the folder exists, but I'm just going to make sure it exists just in case. 04:02.380 --> 04:02.800 Okay. 04:02.800 --> 04:07.160 If you remove it later on and if you try to run this program again. 04:07.160 --> 04:16.910 So let's import os if OS dot path dot exists. 04:17.760 --> 04:21.080 We've image for folder name. 04:21.090 --> 04:30.390 Actually, if it doesn't exist we do s dot mkdir with. 04:31.190 --> 04:31.930 The following. 04:32.000 --> 04:33.560 Okay, that's very quick to do. 04:34.820 --> 04:38.090 And now we have the folder and let's do image. 04:39.340 --> 04:44.710 File name is equal to image folder name plus Slash. 04:45.100 --> 04:47.900 Let's just call it Photo.jpg. 04:49.940 --> 04:50.360 G. 04:50.830 --> 04:56.080 Okay, so every time we're going to take a photo here, we're going to replace the previous one. 04:56.110 --> 05:04.780 Then we need a time dot sleep to actually, maybe if I close this string, it's going to be better. 05:04.780 --> 05:09.760 And we need the time dot slip too, to allow the camera to adjust to the luminosity. 05:09.880 --> 05:10.480 And then. 05:10.480 --> 05:13.250 Well, let's take a photo every two seconds. 05:13.270 --> 05:15.670 So let's do while true. 05:16.480 --> 05:29.580 Let's do camera dot capture with image file name and well, I'm not going to use time dot sleep to hear 05:29.580 --> 05:30.060 why. 05:30.060 --> 05:33.840 Well, I could use that actually just to take a photo every two seconds. 05:33.840 --> 05:40.890 But then as we are going to need to read from Serial, I need to do a non-blocking sleep. 05:40.890 --> 05:43.200 So I'm going to add here. 05:44.700 --> 06:00.030 Last time photo taken equal to and let's import time, time, time and let's say photo delay is equal 06:00.030 --> 06:00.660 to. 06:01.980 --> 06:03.270 Two seconds. 06:03.630 --> 06:08.760 And so now what I'm going to do, I'm not going to add a time sleep, too, but I'm still going to add 06:08.790 --> 06:17.760 time, dot sleep time, dot sleep with zero one, which means that we are still going to block a bit, 06:17.760 --> 06:24.960 but basically just ten milliseconds so we don't use too much CPU and that's going to be completely fine 06:24.960 --> 06:25.860 for the rest. 06:26.220 --> 06:37.020 And then we do if time dot So let's actually create a time now variable with time, dot time. 06:37.740 --> 06:45.450 So if time now minus last time photo taken greater or equal than the photo delay. 06:46.110 --> 06:46.500 Okay. 06:46.870 --> 06:48.690 I've already done that before. 06:48.720 --> 06:50.910 Then we do last time. 06:50.910 --> 06:52.800 Photo taken is equal. 06:54.560 --> 06:58.220 To time now and we take the. 06:59.170 --> 06:59.960 Oh two. 07:00.490 --> 07:02.320 All right, let's try just. 07:02.530 --> 07:04.730 Let's just try this part of the code. 07:04.750 --> 07:08.380 Let's run this so we don't have any communication with Scialfa. 07:08.380 --> 07:10.570 No activity. 07:11.050 --> 07:11.860 Nine. 07:14.180 --> 07:17.860 And we don't have anything printed, of course, so we don't have any output. 07:17.870 --> 07:21.200 But let's go to our folder here. 07:22.010 --> 07:24.110 Camera We have photo. 07:24.740 --> 07:26.330 That's one photo. 07:26.330 --> 07:30.860 And let's wait two seconds and let's click on this. 07:31.970 --> 07:34.910 Okay, let's open it. 07:35.240 --> 07:37.580 Well, we have a problem here. 07:37.610 --> 07:39.230 Let's just refresh. 07:40.160 --> 07:40.700 Okay. 07:40.700 --> 07:43.650 We have another photo that was taken That's different. 07:43.670 --> 07:43.910 Okay. 07:43.940 --> 07:44.540 Same file. 07:44.540 --> 07:45.950 It has been rewritten. 07:45.980 --> 07:53.030 Maybe you need to just refresh the view on the file manager and then you have the photo. 07:53.150 --> 07:53.630 Great. 07:53.630 --> 07:55.670 So this part is working. 07:55.910 --> 07:59.240 And now what we need to do, we need to send that to telegram. 07:59.240 --> 08:04.310 So we're going to first use the way that we can request from Telegram. 08:04.340 --> 08:04.850 Okay. 08:05.540 --> 08:08.870 So for that I'm going to go back to activity eight. 08:08.900 --> 08:11.420 I'm just going to use the code we did before. 08:11.690 --> 08:11.900 Okay. 08:11.900 --> 08:15.810 So we're going to import the data and the common handler. 08:18.830 --> 08:21.200 We are going to create. 08:25.350 --> 08:27.570 And the data a dispatcher. 08:27.720 --> 08:31.380 And then we're going to add some handlers and start pulling. 08:31.380 --> 08:33.150 I'm going to copy all of that. 08:34.660 --> 08:36.310 And where do we put it? 08:36.340 --> 08:41.740 Well, let's just put that after we have initialized the camera and after the time dot sleep. 08:41.920 --> 08:47.170 So we open the file with the bot telegram bot token. 08:47.320 --> 08:52.540 We create an updater, we create a dispatcher, and then we have some command handler. 08:52.540 --> 08:53.950 I'm going to remove that. 08:55.720 --> 09:04.840 And I'm just going to put start and we won't get photo and I'm just going to put get photo. 09:04.840 --> 09:07.240 So we have a start handler and a get photo handler. 09:07.240 --> 09:09.400 Let's create those handlers here. 09:09.640 --> 09:13.260 Actually, the start handler is going to be the same as before. 09:13.270 --> 09:15.010 Let's just put welcome. 09:19.150 --> 09:22.600 And let's create the. 09:27.050 --> 09:33.020 Get photo handler with update context. 09:34.860 --> 09:41.670 And so what we need to do is we need to retrieve the photo that was taken and we need to send it with 09:41.670 --> 09:43.920 bot dot send photo. 09:44.070 --> 09:50.550 So let's do we've open and that's going to be image file name. 09:50.650 --> 09:50.870 Okay. 09:50.880 --> 09:52.050 We already have it. 09:53.100 --> 10:09.690 And with RB as so let's say as photo then we do context dot dot dot send photo with chat id is equal 10:09.690 --> 10:11.460 to let's just reply to the. 10:12.800 --> 10:17.170 A date that effective chatted. 10:17.180 --> 10:26.780 So whoever is triggering the bot and then we don't have text but we have photo is equal to photo. 10:27.260 --> 10:27.590 All right. 10:27.590 --> 10:30.650 This seems okay, let's actually add a print here. 10:30.680 --> 10:33.950 Print camera. 10:33.980 --> 10:34.700 Okay. 10:36.650 --> 10:45.590 And maybe add here print sending photo to telegram. 10:48.660 --> 10:53.220 And one other thing is we need to stop the updater. 10:53.220 --> 10:55.500 So I'm going to add a try here. 10:58.230 --> 11:00.840 With the keyboard interrupt exception. 11:03.130 --> 11:05.350 Except keyboard. 11:07.770 --> 11:08.880 Interrupt. 11:11.040 --> 11:12.180 And we do. 11:12.360 --> 11:23.550 Let's do print stopping telegram of data and a data dot. 11:24.000 --> 11:24.660 Stop. 11:25.200 --> 11:26.660 Okay, let's try this. 11:26.670 --> 11:28.030 Let's try this. 11:28.030 --> 11:29.100 So I'm going to run. 11:32.070 --> 11:33.070 We have camera. 11:33.090 --> 11:33.720 Okay. 11:33.720 --> 11:36.210 So it's going to take photo every two seconds. 11:36.330 --> 11:39.030 And let's go to Telegram. 11:39.060 --> 11:42.720 Let's do slash get photo. 11:43.770 --> 11:45.060 Sending photo to telegram. 11:45.060 --> 11:48.180 You can see here and we receive the photo. 11:48.180 --> 11:49.770 So may take some time. 11:49.770 --> 11:53.970 Depends on your internet connection speed also and well, different things. 11:53.970 --> 11:55.830 But you can see we have the photo. 11:56.460 --> 11:59.610 If I do start also I have the start message. 12:00.660 --> 12:01.470 Welcome. 12:02.010 --> 12:02.520 Okay. 12:02.520 --> 12:06.810 If I do get photo again. 12:08.020 --> 12:09.550 So you can see here we have an error. 12:09.580 --> 12:15.160 Well, because probably we are just requesting the photo when it has been updated. 12:15.510 --> 12:15.620 Okay. 12:15.640 --> 12:17.110 So let's try again. 12:22.730 --> 12:23.090 Okay. 12:23.090 --> 12:25.940 And now it's working with a different photo. 12:27.010 --> 12:29.500 And so, well, you can see it's working. 12:29.500 --> 12:35.560 Maybe an improvement could be that you make sure that the file can be opened because, well, if you 12:35.560 --> 12:40.420 actually take a photo and update the file and try to send the file at the same time, that's not going 12:40.420 --> 12:40.960 to work. 12:40.960 --> 12:46.600 So that could be an improvement you could do or maybe try to use a different file name for each photo. 12:46.840 --> 12:47.010 Okay. 12:47.020 --> 12:50.680 So I'll leave that up to you as an improvement of this activity. 12:50.680 --> 12:56.080 And then, well, we still need to do something else here is that when we have pressed on the button, 12:56.080 --> 12:57.910 we need to send the photo as well. 12:58.090 --> 13:01.510 So I'm going to initialize the communication. 13:02.260 --> 13:05.500 And I'm going to just take from activity eight. 13:05.550 --> 13:11.080 Just going to take this code and let's put it here. 13:11.980 --> 13:13.600 So we initialize the camera. 13:14.880 --> 13:16.650 Let's just. 13:17.850 --> 13:19.980 But the code here. 13:20.160 --> 13:25.500 So first we connect to Serial and then we're going to put that. 13:27.570 --> 13:29.190 He may be after the camera. 13:29.190 --> 13:32.400 So we initialize, shall we initialize the camera? 13:32.400 --> 13:35.970 And then we give some time for both to be set up. 13:35.970 --> 13:38.730 And here I don't need to do sleep. 13:38.730 --> 13:40.350 Two and three, that's going to be five. 13:40.350 --> 13:43.140 I just keep three for both of them. 13:43.140 --> 13:44.520 That's going to be okay. 13:44.520 --> 13:45.600 And I just print. 13:46.900 --> 13:47.730 Um, camera. 13:47.740 --> 13:48.190 Okay. 13:48.190 --> 13:48.550 Here. 13:49.060 --> 13:49.420 Okay. 13:49.420 --> 13:50.110 Here. 13:50.380 --> 13:52.570 And reset the input buffer. 13:53.020 --> 13:55.210 Okay, so everything is correctly set up. 13:55.210 --> 13:59.110 First sale, then camera. 13:59.380 --> 14:01.510 And I am going to. 14:01.810 --> 14:13.390 Before I forget, I'm going to close here, print closing serial, and I'm going to do sale dot close. 14:13.700 --> 14:13.760 Okay. 14:13.840 --> 14:18.880 So we don't forget and then I'm going to read here from sale. 14:18.880 --> 14:28.310 So we have this action which is to take photo and I'm going to add another action which can be after 14:28.310 --> 14:28.690 or before. 14:28.720 --> 14:29.740 It doesn't matter. 14:30.490 --> 14:32.320 Read from sale. 14:32.800 --> 14:46.260 So if, say, dot in waiting is greater than zero, we do messages is equal to say dot read line dot 14:46.370 --> 15:01.760 decode and UTF eight and strip and then we check if message is equal to button. 15:01.760 --> 15:03.470 Let's check this again. 15:03.470 --> 15:04.490 Button pressed. 15:09.720 --> 15:14.820 If this is button pressed, what we do is we send the message. 15:14.820 --> 15:16.560 So to send the message to Telegram. 15:16.560 --> 15:17.460 So we send the photo. 15:17.460 --> 15:21.810 Actually to send the photo to telegram, we need to add a bot. 15:22.290 --> 15:33.480 So I'm going to add from telegram import bot object and let's go where we initialize telegram. 15:33.480 --> 15:35.790 Here we have an updater I'm going to create. 15:35.790 --> 15:42.930 Bot here is equal to bot with the token with the same token. 15:45.180 --> 15:47.370 We have both a boat and an update. 15:47.640 --> 15:55.970 Now we can use this bot to do bot dot send photo chat ID. 15:55.980 --> 15:57.810 So what is the chat ID here? 15:57.810 --> 15:59.670 We don't respond. 16:00.090 --> 16:02.040 Okay, we don't respond. 16:04.200 --> 16:08.340 To a message where we have the update with the effective chat ID. 16:08.460 --> 16:12.480 So we need to know what is the chat ID of where we want to send. 16:13.320 --> 16:15.600 So I'm going to just use the chat ID. 16:17.660 --> 16:20.510 But that was here in the activity seven chat. 16:20.720 --> 16:23.750 I'm just going to use the one that we found previously. 16:25.250 --> 16:27.770 So let's put it there. 16:28.850 --> 16:29.510 Chat ID. 16:32.980 --> 16:34.080 And so I do chat. 16:34.120 --> 16:38.080 ID is equal to chat ID and then what? 16:38.080 --> 16:40.780 I need to also open the photo. 16:42.770 --> 16:45.170 So I'm going to do this. 16:47.290 --> 16:48.850 I sure am going to do this. 16:49.990 --> 16:55.210 So I'm going to do we've let's put the correct indentation. 16:56.100 --> 17:03.660 So when the button is pressed, we open the image file name as a photo and then we send photo is equal 17:03.660 --> 17:04.860 to photo. 17:04.890 --> 17:10.860 We send the photo to the chat ID, so to the chat to the group chat. 17:11.890 --> 17:16.510 The same way we send it when we request with the get photo command. 17:17.080 --> 17:19.630 So now let's run that code again. 17:23.370 --> 17:25.140 Okay, we have an error here. 17:25.440 --> 17:30.870 Cell is not defined here at the beginning. 17:34.850 --> 17:41.630 Well, actually, this is the problem of when you take some code from other programs that maybe you 17:41.630 --> 17:43.580 forget to take everything. 17:43.580 --> 17:44.660 So import. 17:44.810 --> 17:46.940 So that's going to be better like this. 17:49.950 --> 17:50.340 Okay. 17:50.370 --> 17:51.810 Could not connect to sale. 17:51.970 --> 17:59.690 Well, because actually I have to put one. 17:59.700 --> 17:59.880 Okay. 17:59.880 --> 18:06.270 Because if you remember here, I have one, so it's important you check the sale before. 18:06.270 --> 18:09.630 So I'm going to use one here. 18:10.650 --> 18:11.640 Run the script. 18:12.780 --> 18:15.290 Successfully connected to sale camera. 18:15.310 --> 18:15.590 Okay. 18:16.030 --> 18:20.100 Okay, so it's taking a photo every two seconds. 18:20.430 --> 18:23.100 Let's open the telegram app. 18:24.390 --> 18:26.340 And let's press on the push button. 18:27.780 --> 18:29.700 Sending photo to telegram. 18:30.790 --> 18:33.010 And you can see we receive a new photo. 18:33.040 --> 18:36.160 Well, that is me pressing on the push button. 18:36.160 --> 18:41.470 And if I do get a photo, I can also get a photo. 18:41.470 --> 18:46.000 So here we can see that this is not the right timing. 18:46.000 --> 18:50.170 Let's try again and we get a new photo. 18:50.410 --> 18:50.860 All right. 18:50.860 --> 18:57.790 So in this program, you have mixed so on the Python program, on the Raspberry Pi, you have used serial 18:57.790 --> 19:05.440 communication with the camera, with the telegram bot, and now you can mix Raspberry Pi functionalities 19:05.440 --> 19:08.950 and Arduino functionalities in a more complex program. 19:09.130 --> 19:14.290 And this is perfect because we are just about to start the final project of this course.