Multiple sensor fusion in Arduino - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to read the temperature sensor value.

Arduino

int tempValue = analogRead([1]);

Drag options to blanks, or click blank then click option'

AA0

BD2

C13

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Using a digital pin number instead of an analog pin.

Confusing pin numbers with port names.

The temperature sensor is connected to analog pin A0, so we use analogRead(A0) to get its value.

2fill in blank

medium

Complete the code to calculate the average of two sensor readings.

Arduino

int average = (sensor1 + [1]) / 2;

Drag options to blanks, or click blank then click option'

Asensor3

Bsensor2

Csensor4

Dsensor5

Attempts:

3 left

💡 Hint

Common Mistakes

Adding the wrong sensor variable.

Forgetting to divide by 2 after adding.

To average two sensors, add sensor1 and sensor2, then divide by 2.

3fill in blank

hard

Fix the error in the code to combine sensor values correctly.

Arduino

float combined = (sensor1 [1] sensor2) / 2.0;

Drag options to blanks, or click blank then click option'

A+

B*

C-

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using multiplication instead of addition.

Dividing one sensor by 2 before adding.

To combine sensor values by averaging, add them first, then divide by 2.0.

4fill in blank

hard

Fill both blanks to create a dictionary of sensor names and their readings, filtering only sensors with values above 500.

Arduino

std::map<String, int> sensorData = [1];
for (auto const& sensor : sensors) {
  if (sensor.second [2] 500) {
    sensorData[sensor.first] = sensor.second;
  }
}

Drag options to blanks, or click blank then click option'

A{}

B==

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using equality or less than instead of greater than.

Not initializing the map properly.

We start with an empty map {} and add sensors whose values are greater than 500 using the > operator.

5fill in blank

hard

Fill all three blanks to create a fused sensor value by weighting three sensors differently.

Arduino

float fusedValue = ([1] * 0.5) + ([2] * 0.3) + ([3] * 0.2);

Drag options to blanks, or click blank then click option'

AsensorA

BsensorB

CsensorC

DsensorD

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up sensor variables and weights.

Using sensors not listed in the options.

The fused value is a weighted sum: 50% from sensorA, 30% from sensorB, and 20% from sensorC.