WEBVTT 00:00.080 --> 00:00.770 Okay, great. 00:00.770 --> 00:08.960 You can send notification from the Python program to the chat ID and you can also add some callbacks 00:08.960 --> 00:11.210 so you can respond to some comments. 00:11.210 --> 00:14.210 But now let's mix those two. 00:14.240 --> 00:14.630 Okay. 00:14.630 --> 00:22.250 So we can have a program that sends independent notifications and that also responds to comments here. 00:22.250 --> 00:25.190 So I'm going to show you the program structure we're going to use. 00:25.190 --> 00:29.890 And this is also something we're going to use for the next activities and for the final project. 00:29.900 --> 00:33.320 So I'm going to start I'm not going to start from scratch. 00:33.320 --> 00:39.350 I'm going to start from this Telegram bot program here, which is already working. 00:39.350 --> 00:43.970 And I'm going to add simply this into that program. 00:44.090 --> 00:51.110 And so what we do here is we create some handler, okay, with an updater that's going to keep an eye 00:51.110 --> 00:56.360 on the chat, a dispatcher that's going to dispatch any comment you receive to the correct handler. 00:56.360 --> 01:01.590 We start polling and then we use idle to stop the program here. 01:02.260 --> 01:09.390 What I'm going to do is I'm going to remove this idle and we are going to use instead a while true loop. 01:09.390 --> 01:09.630 Okay. 01:09.630 --> 01:13.410 So basically we are going to use an infinite loop just like we did before. 01:13.410 --> 01:15.930 This is kind of the void setup. 01:15.930 --> 01:20.460 And then we are going to create a void loop like we have on the Arduino. 01:20.460 --> 01:24.540 And I'm going to do while true. 01:25.650 --> 01:25.920 Okay. 01:25.920 --> 01:33.300 And this is where we are going to do our program and for example, send some notifications. 01:33.300 --> 01:39.660 So if we want to send some notification, I'm going to do this from Telegram import bot, I'm going 01:39.660 --> 01:45.480 to put it there and I'm also going to create a bot. 01:46.620 --> 01:49.710 Okay, so we already have the token. 01:50.230 --> 01:50.440 Okay. 01:50.460 --> 01:54.450 So create a bot here just before the updater for example. 01:54.450 --> 01:57.150 So we have the bot and the updater. 01:57.750 --> 02:00.570 And for each we give the telegram token. 02:00.840 --> 02:01.140 Okay. 02:01.140 --> 02:04.860 I'm also going to do this chat ID, okay. 02:05.790 --> 02:10.110 And put it there so we can use the chat ID with the bot. 02:10.440 --> 02:18.060 We could use this chat ID actually here so that any time you send a comment to the bot, we're going 02:18.060 --> 02:19.530 to respond to this group. 02:19.530 --> 02:21.060 But I'm going to keep it like this. 02:21.060 --> 02:27.600 So basically this means that if you have another group or if you just send a message directly from your 02:27.600 --> 02:36.870 user to the bot, well by using updated active chatted, you're going to respond to whoever is sending 02:36.870 --> 02:39.110 the message, whoever is sending start. 02:39.120 --> 02:46.800 Okay, So from this group or from another group or from your user, if you use this chat ID well, every 02:46.800 --> 02:49.230 time you receive something, you're just going to send back a message. 02:49.230 --> 02:50.310 But to this group. 02:50.310 --> 02:56.070 So if you send a command from another group, you are still going to reply to this group instead. 02:56.070 --> 02:57.600 Okay, so we're going to keep this. 02:57.600 --> 03:02.400 So we directly respond to the one who sends the comment. 03:02.880 --> 03:08.080 I'm going to remove this print here and then, well, we still have this chat ID, so when we send a 03:08.080 --> 03:11.980 notification, however, that's always going to be in this group. 03:11.980 --> 03:21.280 And so now let's say we want to send a notification every 10s for example, what we can do is do bot 03:21.280 --> 03:30.220 dot send message with chat ID is equal to chat, ID and text. 03:31.690 --> 03:33.820 Let's put Hi. 03:35.240 --> 03:37.280 Something new. 03:38.630 --> 03:40.010 And let's add a time. 03:40.010 --> 03:44.660 I'm going to add a time dot sleep here for, let's say 10s. 03:44.780 --> 03:47.540 Let's import time. 03:48.200 --> 03:48.440 Okay. 03:48.440 --> 03:49.370 So here, no problem. 03:49.370 --> 03:51.710 We can use Time.sleep. 03:51.710 --> 03:56.840 So we are not going to use that in the future if we want to do many things in the whiletrue. 03:56.840 --> 04:02.150 But for this simple example, if we just want to send a message every 10s, that's okay. 04:02.150 --> 04:09.680 And that's not going to be a problem for the updater because this is going to pull the telegram chat 04:09.680 --> 04:11.090 in a different thread. 04:11.090 --> 04:17.120 Okay, so the start handler is going to be in a different thread, not on the same thread as this. 04:17.120 --> 04:18.710 So this is not a problem. 04:18.710 --> 04:20.270 We can block the application. 04:20.540 --> 04:26.390 The polling for the updater is still going to work, but then, well, the program is still not complete. 04:26.420 --> 04:27.050 Why is that? 04:27.050 --> 04:33.440 Because now when we start polling and then we do this and if I do control C, I'm going to exit from 04:33.440 --> 04:34.250 the application. 04:34.250 --> 04:38.010 But first I need to close the updater. 04:38.040 --> 04:38.490 Okay? 04:38.490 --> 04:42.780 Just like when you use Serial, you need to close serial communication here. 04:42.780 --> 04:48.060 We need to close the updater with the function idle that was already done for you. 04:48.060 --> 04:49.410 But now we need to do this. 04:49.410 --> 04:56.550 So I'm simply going to do what we did before is to put this while true inside a try. 04:56.580 --> 04:57.390 Except. 04:58.590 --> 05:09.780 We've keyboard interrupt and when we have the keyboard interrupt, I'm going to do a data dot stop. 05:10.010 --> 05:10.150 Okay. 05:10.170 --> 05:12.600 We use the stop function on the update. 05:14.040 --> 05:15.690 This can take some time. 05:15.690 --> 05:21.850 So we are also going to print print stopping data. 05:22.870 --> 05:23.580 These. 05:25.260 --> 05:28.050 Wait a few seconds. 05:29.520 --> 05:29.850 Okay. 05:29.850 --> 05:34.500 So we know we have to wait a bit and not price controls in multiple times. 05:34.500 --> 05:36.810 And let's also add a print here. 05:36.960 --> 05:39.390 Send message so it's easier to debug. 05:40.410 --> 05:41.160 Okay. 05:41.160 --> 05:43.920 Now let's run that code. 05:45.940 --> 05:49.720 Okay, so we have telegram bot ready. 05:49.750 --> 05:52.900 We can start to send some commands with start. 05:53.080 --> 05:59.680 We receive hello from Python and we also every ten second receive send message. 06:00.040 --> 06:05.050 So we actually receive hi something new and we have send message here on the terminal. 06:05.050 --> 06:05.830 Let's wait a bit. 06:05.860 --> 06:06.100 Okay. 06:06.130 --> 06:06.790 Send message. 06:06.790 --> 06:07.630 You can see. 06:07.660 --> 06:08.170 Hi. 06:08.200 --> 06:08.860 Something new. 06:08.860 --> 06:14.350 And we have also received a notification on my phone and on the desktop app. 06:14.560 --> 06:16.120 And so you can see. 06:16.600 --> 06:16.840 Hi. 06:16.870 --> 06:17.530 Something new. 06:17.530 --> 06:25.900 I can send a command, receive responses from the callback and I can also receive independent notifications, 06:25.930 --> 06:27.850 all that at the same time. 06:28.570 --> 06:34.240 Now I can go there, press Ctrl C stopping a data please wait a few seconds. 06:34.240 --> 06:35.380 So we wait. 06:36.650 --> 06:41.810 And the updater is now stopped and the program exited. 06:42.470 --> 06:43.130 Okay, great. 06:43.160 --> 06:50.000 Now you have a complete Python program structure to communicate between your Raspberry Pi and a telegram 06:50.000 --> 06:50.630 chat.