WEBVTT 00:00.210 --> 00:07.440 Now that you have correctly plugged your LCD display screen with your OTTERNESS secret, let's actually 00:07.440 --> 00:14.730 see how to print some text on the LCD screen and you will see that's actually really simple to do. 00:15.180 --> 00:21.840 So we just need to set up the pins and the LCD screen correctly and then that would be super easy. 00:22.170 --> 00:31.980 So the first thing we need to do is to include a new library, include liquid crystal dot h. 00:32.320 --> 00:39.240 OK, so just like we have done with the iPad from memory, if you remember, we use the same format, 00:39.240 --> 00:40.560 OK, for include. 00:40.860 --> 00:43.810 But this time we use, of course, liquid crystal. 00:44.760 --> 00:52.380 This is the library to print text on the LTTE display screen and this library is already installed with 00:52.380 --> 00:53.130 your Arduino. 00:54.360 --> 01:01.680 So now what we need to do, we are going to do define for all the things that we need, OK, for that 01:01.680 --> 01:02.350 library. 01:02.520 --> 01:07.790 So once we have done that, we don't need to worry anymore about the numbers of the pin. 01:08.430 --> 01:11.670 So I'm going to start with LCD and then the name of the PIN. 01:11.680 --> 01:20.990 So Elsley are as being we are going to need that beam and that pin is actually plugged to unlock a five. 01:21.240 --> 01:25.710 So that's an analog we are going to use as a normal digital feed. 01:26.280 --> 01:36.090 Then we have LCD screen, which is on a four, also an analog, and we are going to use as a digital 01:36.090 --> 01:38.570 pin and then define density. 01:38.920 --> 01:52.980 We we're going to need default pin, which is lowered to digital PIN number six and the five, which 01:53.340 --> 01:54.530 is on page seven. 01:55.080 --> 01:55.890 Then we have. 01:57.820 --> 02:07.550 That's six and eight and the last one as the seven pin on PIN number nine. 02:07.840 --> 02:11.980 So we are going to need to use those six pins. 02:12.310 --> 02:17.590 So make sure have correctly plugged the component and also make sure that let's say you have used a 02:17.590 --> 02:21.250 different pin than for my secret, which is totally fine. 02:21.670 --> 02:26.500 But make sure you correctly use the right name for the right pin, OK? 02:26.800 --> 02:34.000 And now to initialize the liquid crystal, first we need to create a liquid crystal object or key from 02:34.000 --> 02:35.350 that library. 02:35.600 --> 02:41.540 So to do that, we are going to do that in the global scope liquid crystal. 02:41.890 --> 02:50.020 So you put liquid crystal the name of the library, and then you put LCD open, close parentheses and 02:50.020 --> 02:52.040 don't forget the semicolon. 02:52.060 --> 02:59.380 And here we are going to need to give the different pins, OK, so that the LCD can initialize the pins 02:59.710 --> 03:01.060 with the correct number. 03:01.330 --> 03:03.190 And the first one is the R. 03:03.190 --> 03:03.670 S. 03:04.570 --> 03:06.840 So you need to provide the arguments in the order. 03:06.850 --> 03:07.750 That's very important. 03:08.440 --> 03:09.390 Then you have to eat. 03:10.450 --> 03:12.100 OK, and then default. 03:14.310 --> 03:17.310 What I'm going to do is go back to a new line, so it's. 03:18.650 --> 03:23.450 Easier to read than we have defined the six. 03:24.800 --> 03:30.830 And so just in the other, I have written the pin here, that's very important, you keep the same order 03:30.830 --> 03:31.090 here. 03:32.150 --> 03:32.460 All right. 03:32.540 --> 03:38.120 And once you have done that, well, you don't need to worry anymore about the pins and the hardware. 03:38.390 --> 03:41.740 You just need to use the functionality to bring some text. 03:42.110 --> 03:46.190 So in the setup, we're going to need to initialize the screen. 03:46.220 --> 03:49.550 So that's the same name here. 03:50.030 --> 03:51.310 Don't begin. 03:51.830 --> 03:54.380 And then you need to provide two arguments. 03:54.390 --> 03:56.360 I'm going to be 16 and two. 03:56.660 --> 04:04.340 So basically how many Kolon you are going to use and how many rows of lines you are going to use, because 04:04.370 --> 04:06.910 this is a 16 by two characters screen. 04:06.920 --> 04:13.790 Well, we just put 16 and two because the LCD library will also look for screens that have a different 04:13.790 --> 04:14.210 size. 04:14.210 --> 04:19.960 So with this special hardware, you are going to use LCD beginning with 16 and two. 04:20.390 --> 04:29.820 And once you have done that, you can simply print some text with density that print say hello world. 04:31.100 --> 04:34.780 OK, that's very similar as what you did with the cell communication. 04:34.790 --> 04:40.950 Actually, you just have a print function and then you put some text and let's run this. 04:41.510 --> 04:44.510 So I have connected my board and it's uploading. 04:44.570 --> 04:46.730 It's the same as LCD. 04:49.610 --> 04:52.950 OK, and that is what you may see. 04:52.970 --> 05:00.440 OK, so you will have the energy, so basically the energy of the LCD spoiled answer, the LCD powelltown, 05:00.470 --> 05:02.480 that you don't see any text. 05:02.690 --> 05:08.220 And this is because you actually need to tune the LCD with the potential monitor here. 05:08.540 --> 05:16.640 So the potential matter has the data goes through a pin of the LCD, OK, to tune the contrast of the 05:16.640 --> 05:17.540 LCD screen. 05:17.840 --> 05:24.680 So here, I'm going to turn it and see what I can do and turn it on one side and the other side and 05:24.830 --> 05:28.860 oh, you can see here I get the other one. 05:29.120 --> 05:36.350 So you need the potential to be able to tune the LCD contrast so you can see what's written. 05:36.500 --> 05:39.140 OK, so here it looks good. 05:39.830 --> 05:43.580 And we have the HelloWallet printed on our display screen. 05:44.960 --> 05:51.040 And back to Tinker Cat to show you how it works, so we have our secret with the LCD display screen 05:51.050 --> 05:53.020 actually here, I didn't really mean. 05:53.040 --> 05:58.880 So I'm going to rename it LCD if I see 16 by two. 06:00.510 --> 06:04.990 And so I have the same exact thing, code trying to bring to the world. 06:05.280 --> 06:10.440 Let's run the simulation and let's see what we get on the inside. 06:10.960 --> 06:13.020 So you see, we have to help the world. 06:13.650 --> 06:17.640 And I'm going to this is the position without having to turn it, OK? 06:17.690 --> 06:24.980 And we have the exact same behavior as we had for the real acidy. 06:24.990 --> 06:29.260 So they look here, we were already having HelloWallet. 06:29.910 --> 06:37.590 These OK, this seems the correct said OK, you can see is the same thing for tuning the potential matter 06:38.070 --> 06:41.190 in the real housesitter up in the simulation.