WEBVTT

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In this new activity, you are going to start from the code we have here.

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So to read the ultrasonic sensor and also using the interrupt and you are going to add a new functionality

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with the three entities that we have on the secret.

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So basically, when you read the distance here, you are going to go on and depending on the distance

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so you can, for example, alert the user if an obstacle is too close from the sensor and maybe too

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close from the robot of the original.

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So what you are going to do is you are going to check the distance.

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And if the distance is greater than, let's say, one meter is a 100 centimeter, then you will power

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the LDP or the green and all the energy on them.

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Attention.

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You don't have a green energy.

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OK, now if the distance is between 15 and 100 centimeter, you will power on the yellow alley.

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OK.

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The PIN number.

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OK, as a warning.

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OK, if there is nothing closer than one meter, that is fine.

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OK, there is no danger.

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If there is something between 15 centimeters and one meter, then with the yellow LCD we get a warning

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and then if the distance is lower than 15 centimeter in that case.

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Red energy, all the energy that isn't been put, so in that case, we have the real obstacle that is

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just in front of the robot and then we need to take some action.

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So here we are just going to show an indication, OK, depending on the distance.

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And this activity is actually not that complicated.

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What I recommend you to do is not actually because we are going to start I'm going to start from this

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program in the activity solution.

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But what you can do is start from scratch and redo the entire program by yourself, try to do the entire

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program to get the ultrasonic distance using the Internet and then add this functionality.

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And I will see you in the next listen for the solution.