Sensor Filter Selection

Question

Problem: Sensor Filter Selection. Solve this hands-on electronics task on EWskills.

Accepted Answer

#include 
#include 
using namespace std;

// Define available filter modes
enum FilterMode {
    NONE,
    LOW,
    HIGH
};

// Default filter mode is NONE
int readSensor(int raw, FilterMode mode = NONE) {
    if (mode == NONE) {
        return raw;
    }
    if (mode == LOW) {
        return raw / 2;
    }
    return raw / 4; // HIGH filter
}

int main() {
    int raw, modeFlag;
    cin >> raw >> modeFlag;

    if (modeFlag == 0) {
        cout << readSensor(raw);
    } else {
        string filterName;
        cin >> filterName;

        FilterMode filter = (filterName == "LOW") ? LOW : HIGH;
        cout << readSensor(raw, filter);
    }

    return 0;
}

Explanation & Logic Summary

The sensor-reading function uses a default argument, allowing it to be called with or without a filter mode.
If no filter is provided, NONE is automatically selected.
An enum is used to represent filter modes, improving readability and type safety.
LOW and HIGH modes apply progressively stronger integer-based smoothing.

Firmware Relevance & Real-World Context

Embedded sensor drivers often provide optional filtering or averaging modes.
Default arguments simplify common API usage while allowing configurability.
Enums prevent invalid configurations and improve code clarity.

17. Sensor Filter Selection