WEBVTT 00:00.110 --> 00:04.280 Here is yet another activity for you to practice more on cereal. 00:04.280 --> 00:07.820 And in this activity, here is what you are going to do. 00:08.180 --> 00:11.690 So from the Arduino, you are going to send a counter. 00:11.690 --> 00:13.850 So you're going to initialize a counter. 00:13.880 --> 00:23.000 Okay, so init counter and then send it every 500 milliseconds. 00:23.000 --> 00:28.880 So every time of course you're going to increase the counter and so increment it. 00:29.570 --> 00:32.780 So you send zero, one, two, three, etcetera. 00:33.440 --> 00:33.680 Okay. 00:33.680 --> 00:40.790 And that of course from the main loop on the Raspberry Pi, what you are going to do is of course receive 00:40.790 --> 00:42.800 and print the counter. 00:43.100 --> 00:44.840 So that is the first action. 00:45.140 --> 00:48.380 Now this would be a little bit too easy for you at this point. 00:48.380 --> 01:00.590 So what you're going to do is also that every 10s, so every 10s you are going to reset the counter. 01:00.590 --> 01:05.150 So to reset the counter, you are going to need to send a special command to the Arduino. 01:05.150 --> 01:10.490 And on the Arduino is that when you receive when receive 01:12.830 --> 01:19.700 reset counter command, then you reset the counter, of course, so you reset it to zero. 01:19.700 --> 01:24.740 And the thing is that those two actions here are completely independent. 01:24.770 --> 01:25.190 Okay? 01:25.190 --> 01:32.390 So here, as you did in the previous activity, you're going to send the counter every 500 milliseconds 01:32.420 --> 01:39.650 without using delay and you're going to in parallel and in a different action check if you have received 01:39.650 --> 01:44.540 that reset counter comment on the Raspberry Pi, you're going to do the same. 01:44.660 --> 01:45.200 Okay. 01:45.200 --> 01:51.710 So in Python, you are not going to use time dot sleep for 10s, of course, because if you do that, 01:51.710 --> 01:56.270 you're not going to be able to print the counter for 10s. 01:56.300 --> 01:56.840 Okay. 01:56.840 --> 02:04.040 So in Python you're going to need to do also a non-blocking action every 10s with basically the same 02:04.040 --> 02:06.980 structure as we did previously on the Arduino. 02:06.980 --> 02:14.690 So in your while true in the void loop of your Python program, the first action or the second. 02:14.690 --> 02:15.560 Okay doesn't matter. 02:15.560 --> 02:22.640 The order is to receive and print the counter and the second action is to reset the counter whenever 02:22.640 --> 02:24.470 you have past 10s. 02:24.500 --> 02:24.950 All right. 02:24.950 --> 02:27.680 And I will see you in the next video for The Solution.