1 00:00:01,170 --> 00:00:08,790 In this election can show you how to set and use the real time clock or ROTC unit that is integrated 2 00:00:08,790 --> 00:00:14,670 into the E.S.P 32, which is basically a clock which keeps a very accurate account of the time. 3 00:00:15,180 --> 00:00:20,940 I want you to go to lectures and two experiments to demonstrate in the first one, which is this one 4 00:00:20,940 --> 00:00:26,850 here, which is going to show you the simplest way to work with the RTC simply to manually set it and 5 00:00:26,850 --> 00:00:29,490 then to get the time and date out of it. 6 00:00:30,360 --> 00:00:35,150 In the second lecture, which is coming up right after this one, I'm going to show you how to use the 7 00:00:35,160 --> 00:00:46,050 A.P. time library, as well as a Internet based real time clock service in order to acquire automatically 8 00:00:46,560 --> 00:00:53,540 accurate time from an atomic clock and use that to set your be 32 D.C.. 9 00:00:54,150 --> 00:00:58,490 So let's keep things simple and begin with our first example. 10 00:00:58,860 --> 00:01:07,020 So the inability to, as I said, contains a real time clock and the micro python implementation that 11 00:01:07,020 --> 00:01:10,420 allows you to control it and to use it is very simple. 12 00:01:10,770 --> 00:01:12,690 So let's begin with the documentation. 13 00:01:12,690 --> 00:01:17,790 I am looking at the micro python documentation, quick reference for the SB 32. 14 00:01:17,790 --> 00:01:21,750 And down here you'll see a reference for the real time clock ATC. 15 00:01:22,200 --> 00:01:26,940 Click on that and you'll see an example of how you can use the ATC. 16 00:01:27,240 --> 00:01:29,430 You just create the ATC object. 17 00:01:29,430 --> 00:01:38,400 Then you use this initial data to set the date in time manually and then you can get the IDC date in 18 00:01:38,400 --> 00:01:42,060 time by calling day time, but without a parameter. 19 00:01:42,210 --> 00:01:47,730 And that will give you back a couple that contains the individual components for the date and the time. 20 00:01:48,330 --> 00:01:55,080 One thing or that I want to show you here in the E.S.P eight two six six real time clock documentation 21 00:01:55,350 --> 00:02:00,930 is that it also contains an example of how to use the A.P. time library. 22 00:02:01,200 --> 00:02:07,110 And therefore, as long as you're connected to a local network via Wi-Fi and from there to the Internet 23 00:02:07,110 --> 00:02:13,710 to this library will automatically go out and find a Interpeace server and synchronize the RTC. 24 00:02:13,980 --> 00:02:18,810 So the ISP 32 internal clock with the atomic clock on the Internet. 25 00:02:18,930 --> 00:02:21,250 But I'm going to show you how to do this in the next lecture. 26 00:02:22,170 --> 00:02:28,720 Now, another thing that I would like to mention here before moving on is that as per the years prior 27 00:02:28,740 --> 00:02:38,670 to documentation, when you put your inability to even to deep sleep, the RTC is still powered, which 28 00:02:38,670 --> 00:02:47,280 means that your clock will not lose its information and you will not need to reset it again after E.S.P 29 00:02:47,320 --> 00:02:48,400 32 wakes up. 30 00:02:48,810 --> 00:02:57,480 So for as long as your ISP 32 is powered, whether it is running properly or normally or is in light 31 00:02:57,480 --> 00:03:05,070 or deep sleep, then the clock will retain its data and the clock will continue ticking and keep the 32 00:03:05,070 --> 00:03:05,430 time. 33 00:03:06,300 --> 00:03:06,600 All right. 34 00:03:06,600 --> 00:03:08,820 Let's move on to the example script. 35 00:03:08,820 --> 00:03:09,510 Very simple. 36 00:03:09,510 --> 00:03:13,440 As you can see, I'm importing ATC from the machine module. 37 00:03:14,270 --> 00:03:15,380 I've got sleep. 38 00:03:15,390 --> 00:03:17,910 And this just to add a little bit of delay here. 39 00:03:17,920 --> 00:03:20,640 Every time I'm printing out the current time. 40 00:03:21,270 --> 00:03:28,050 And as per the example that you saw in the documentation of this, create the RTC object by calling 41 00:03:28,050 --> 00:03:35,990 the ATC constructor and then I am going to manually set the time and date. 42 00:03:36,510 --> 00:03:38,220 So here is a tough week. 43 00:03:38,220 --> 00:03:45,240 And she, of course, added she thought daytime and then the single parameter that daytime receives 44 00:03:45,660 --> 00:03:51,270 is a table that contains the individual components of the time, the days of the year, the month, 45 00:03:51,870 --> 00:03:57,450 the date, and then the day of the week and then the time. 46 00:03:57,870 --> 00:04:01,500 So hours, minutes, seconds and subsequence right here. 47 00:04:02,130 --> 00:04:08,880 So this is approximately the time now is going to change this to a six and for the second, such as 48 00:04:08,880 --> 00:04:09,660 make the zero. 49 00:04:11,390 --> 00:04:14,450 All right, then we're done here with the set up. 50 00:04:15,080 --> 00:04:19,710 The clock is now set and I've got an infinite loop every one second. 51 00:04:19,730 --> 00:04:25,130 It's going to get the date time by calling daytime or the ATC object without a parameter. 52 00:04:25,520 --> 00:04:30,330 And I'm going to print out the raw content of the daytime variable. 53 00:04:30,350 --> 00:04:36,230 It's just a couple is going to come out and then I'm breaking down the individual components of this 54 00:04:36,230 --> 00:04:40,040 table so I can extract the year, the month and so on. 55 00:04:40,550 --> 00:04:43,370 And then down here I'm doing the same thing, but extracting the time. 56 00:04:44,390 --> 00:04:46,280 So let's run this. 57 00:04:46,310 --> 00:04:49,790 I'm just going to save it and click on the play button. 58 00:04:50,660 --> 00:04:51,240 There you go. 59 00:04:51,500 --> 00:04:53,240 Here's what the table looks like. 60 00:04:55,020 --> 00:04:56,040 It should be bigger 61 00:04:58,800 --> 00:05:03,510 and we're just going to look at the first one, here's a current date a year, month and day of the 62 00:05:03,510 --> 00:05:08,230 week, just control C actually to stop. 63 00:05:08,270 --> 00:05:08,530 Right. 64 00:05:09,980 --> 00:05:20,000 So 28 year, month, day and day of the week of the week, as you see here, I just added a zero and 65 00:05:20,000 --> 00:05:23,270 then the clock will automatically just give me that. 66 00:05:23,780 --> 00:05:25,520 It seems like Monday is zero. 67 00:05:26,300 --> 00:05:28,250 Tuesday is one and so on. 68 00:05:29,930 --> 00:05:30,950 And then I've got the time. 69 00:05:31,910 --> 00:05:36,440 So the time started at the moment where I've said it. 70 00:05:36,800 --> 00:05:39,860 And then we've got the seconds, just counting. 71 00:05:41,460 --> 00:05:44,160 And as you can see, the time is correct. 72 00:05:46,430 --> 00:05:53,720 If I just canceled the execution of the program, if I import. 73 00:05:54,920 --> 00:05:59,880 To and create the RTC object, just like in the program. 74 00:06:01,980 --> 00:06:06,900 And then get the current day time from the ATC. 75 00:06:09,890 --> 00:06:10,700 Print it out. 76 00:06:15,800 --> 00:06:22,550 You can see that it is giving me the correct date and time at this moment, seven, 21 one. 77 00:06:22,640 --> 00:06:23,780 Yes, that's correct. 78 00:06:24,700 --> 00:06:30,770 So ATC is retained in hardware, regardless of whether my program is running or not. 79 00:06:31,730 --> 00:06:32,060 All right. 80 00:06:32,060 --> 00:06:34,110 So this was quite easy. 81 00:06:34,130 --> 00:06:43,370 How about we move on to the next lecture and learn how to acquire a very precise date and time from 82 00:06:43,370 --> 00:06:50,430 an atomic clock on the Internet so that you can use that to set your real time clock on the battery 83 00:06:50,450 --> 00:06:50,690 to.