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🚀 Exercises Level 3 Distance Sensor

In this exercise we will make a distance sensor that provides auditory feedback if an object is in close vicinity of the sensor. You will need the I²C UltraSonic sensor and the Atom Echo (built-in speaker) or any other Atom with the echo- or speaker base attached. + or + + or + + The code blocks will be similar regardless of the choice of base.

Connect the sensor and bases, open UIFlow2 and continue with the exercise below.

🚀 Exercises Level 3 Distance Sensor Setup UIFlow2

• Use the UIFlow2 IDE to setup the apropriate device, add the Ultrasonic sensor and Speaker or Echo Base
  ⚠ Note:
  When using the Atom-Echo do not attach a base, this controller has a built-in speaker. The speaker code blocks will appear in the hardware blocks.

Create a variable called 'interval'.

In the loop code block propagate the 'interval' variable with the ultrasonic sensors measured value.
The sensor will return a float, convert it to an integer (can be found in Math Category).
Set a timer with the 'interval' value in milliseconds.

Run the code to see if the distance sensor is working, notice the timing difference with different distance values.

If your sensor works we are going to add a beep, because the interval is connected to the sensor value the closer an object appears in front of the sensor, the lower the interval will be, the faster the speaker will beep.

You can increase/decrease the volume of the speaker if needed (apply in the setup block).

Run the code on the device. If all went well you will have a working distance sensor!

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