Hall Effect Sensor - Detecting magnetic presence with Qwiic digital sensor

This page contains a simple example with function documentation on how to take measurements using the SI7211-B-06-IV Hall effect sensor and Qwiic connection.

Qwiic Digital output example

#include "Hall-Effect-SOLDERED.h"

HallEffect_Digital_EasyC hall;

void setup()
{
    // Initialize serial communication
    Serial.begin(115200);

    // Initialize sensor via EasyC (required!)
    hall.begin();
}

void loop()
{
    // Read sensor
    bool hallReading = hall.getReading();

    // Print sensor value to serial
    Serial.print("Digital Hall Effect Sensor reading: ");
    Serial.println(hallReading);

    // Print a string depending on the measurement result
    if(hallReading)
    {
        Serial.println("Magnet detected!\n");
    }
    else
    {
        Serial.println("No magnet detected.\n");
    }
    
    // Wait a bit until next measurement
    delay(1000);
}

HallEffect_Digital_EasyC hall()

Creates digital sensor object

Returns value: none

hall.begin()

Initialises digital sensor object

Returns value: Returns true if initialization is successful, false otherwise.

Function parameters:

Type	Name	Description
uint16_t	address	Optional, used for changing breakout address, default is 0x30

hall.getReading()

Requests a new reading from the SI7211-B-00-IV sensor.

Returns value: Returns bool value, true if magnet is detected and false for no magnet detected.

Sensor when magnet is not present

Serial Monitor output

Sensor when magnet is present

Serial Monitor output

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Full example

Try all of the above mentioned functions in this full example which detects presence of magnetic object.

digitalReadEasyC.ino

Example file for using Digital Hall effect sensor with easyC/Qwiic/I2C