WEBVTT 00:00.050 --> 00:06.590 Let's quickly see how to control the RGB led with your Arduino once again in this section. 00:06.590 --> 00:08.360 I'm going to go quite fast. 00:08.390 --> 00:14.750 The goal is not to go into details about each Arduino functionality, but to reach the next activity 00:14.750 --> 00:21.650 part where you will practice on Arduino functionalities controlled by the Raspberry Pi using serial 00:21.650 --> 00:22.570 communication. 00:22.580 --> 00:27.260 So let's start and let's directly write some basic code for the RGB Led. 00:27.380 --> 00:30.860 So what you can do here already is to connect your Arduino. 00:30.860 --> 00:36.470 So once the circuit is correctly done, you can connect your Arduino back to the Raspberry Pi with the 00:36.470 --> 00:42.650 USB cable and then check that you have the Arduino connected here with the correct board, of course. 00:42.830 --> 00:48.230 And now, well, basically how to control an RGB led is very simple. 00:48.230 --> 00:52.310 If you already know and you probably already know how to control an Led. 00:52.490 --> 00:59.180 Well, an RGB Led is nothing more than three different LEDs when we speak about the code. 00:59.180 --> 01:04.350 So we are going to control each leg of each color separately. 01:04.350 --> 01:06.780 So I'm going to create some define here. 01:06.780 --> 01:12.810 So define RGB red pin with PIN number 11. 01:12.930 --> 01:16.320 So make sure that you use the pins you have selected. 01:16.320 --> 01:19.830 If you have selected different pins, define RGB. 01:21.030 --> 01:30.510 So green pin ten and define RGB blue pin nine. 01:30.510 --> 01:36.900 And if you have some doubt about the order of those pins for you, well, just start with this and then 01:36.900 --> 01:41.070 you will be able to change that after you experiment with some code. 01:41.070 --> 01:42.420 So we have the defines. 01:42.450 --> 01:48.810 Then what we do is we simply do pin mode on each leg. 01:48.810 --> 01:49.380 Okay? 01:49.470 --> 01:54.450 Just like we were controlling three different LEDs. 01:54.450 --> 01:56.970 Okay, so pin mode for the red pin. 01:57.390 --> 02:03.590 PIN mode for the green pin mode for the blue. 02:06.410 --> 02:07.040 Okay. 02:07.220 --> 02:09.740 Everything is correctly set up and then. 02:09.740 --> 02:11.480 Well, I'm not going to do anything in the loop. 02:11.480 --> 02:15.590 I'm just going to show you how to just power on this RGB led. 02:15.740 --> 02:21.080 So if you do digital right here, you can do digital, right? 02:21.080 --> 02:23.240 And you can also do analog, right? 02:23.240 --> 02:27.550 Because we are using pins that are compatible. 02:27.560 --> 02:28.850 I'm going to start with digital. 02:28.850 --> 02:29.480 Right? 02:29.780 --> 02:30.320 Okay. 02:30.830 --> 02:32.750 So you can put, for example. 02:32.990 --> 02:35.870 Hi, and then the digital. 02:35.900 --> 02:37.850 Let's just use the same here. 02:39.730 --> 02:45.370 So for the red and then for the green and then for the blue. 02:46.990 --> 02:51.340 So let's say we want only to power on so low. 02:51.610 --> 02:53.650 Only the green and the blue. 02:53.690 --> 02:53.910 Okay. 02:53.920 --> 02:56.830 To make a combination of green and blue color. 02:56.830 --> 03:05.160 So those are going to be powered on with full intensity and this one with zero intensity. 03:05.170 --> 03:09.400 So let's So board is connected. 03:09.430 --> 03:11.440 Let's upload. 03:14.140 --> 03:14.530 All right. 03:14.530 --> 03:21.220 And you can see we have this color, which is not exactly blue, not exactly green, but in the middle. 03:21.400 --> 03:24.280 So with this, you can do different combinations, okay? 03:24.310 --> 03:26.980 Up to seven different combinations. 03:26.980 --> 03:30.040 And then I'm going to comment this. 03:31.840 --> 03:34.960 And now let's see an example with analog. 03:36.080 --> 03:36.580 Right? 03:36.610 --> 03:37.210 Okay. 03:37.810 --> 03:41.620 So I'm going to use also the pin like this. 03:41.620 --> 03:45.550 And then you need to give a number between 0 and 255. 03:45.550 --> 03:48.430 So here you have more control over the colors. 03:48.460 --> 03:48.910 Okay? 03:48.910 --> 03:52.180 So if you put zero, that's going to be powered off. 03:52.180 --> 03:56.950 If you put 255, it's just like you use digital, right, with high. 03:56.980 --> 04:04.660 And then if you use any of, for example, the 180, this is going to be a percentage of the brightness 04:04.660 --> 04:07.210 basically between 0 and 255. 04:07.240 --> 04:11.860 That's going to be applied to the red color of the RGB. 04:12.250 --> 04:15.400 So let's do this. 04:15.400 --> 04:20.680 I'm going to use the same for the green, but I'm going to put zero here. 04:20.680 --> 04:23.290 I'm going to try to make a purple color. 04:23.320 --> 04:28.000 So I'm going to do blue and let's say 200. 04:28.030 --> 04:28.600 Okay. 04:28.690 --> 04:33.940 So we're going to do a mix of red and blue, which should turn purple. 04:34.180 --> 04:35.350 And let's see that. 04:35.350 --> 04:37.450 So let's run the code. 04:38.450 --> 04:41.900 Upload, uploading and done uploading. 04:42.080 --> 04:42.590 Okay. 04:42.590 --> 04:45.770 And we have a color that is purple. 04:46.730 --> 04:48.620 So that's pretty much it for the RGB. 04:49.250 --> 04:57.590 You first create some defined or const int and then you do pinmode for each pin and then you can use 04:57.590 --> 05:00.480 either digitalwrite or analogwrite. 05:00.530 --> 05:06.920 So this only if you have the functionality of course, and you can create any combination of color and 05:06.920 --> 05:09.020 this you can use in the setup in the loop. 05:09.020 --> 05:11.780 Well, you can use that anywhere you want.