Project #28 – Sensors – Magnetometer HMC5883L – Mk02

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#DonLucElectronics #DonLuc #Sensors #HMC5883L #ADXL335 #Adafruit #SparkFun #Arduino #Project #Fritzing #Programming #Electronics #Microcontrollers #Consultant

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SparkFun Triple Axis Magnetometer – HMC5883L

This is a breakout board for Honeywell’s HMC5883L, a 3-axis digital compass. Communication with the HMC5883L is simple and all done through an I2C interface. There is no on-board regulator, so a regulated voltage of 2.16-3.6VDC should be supplied. The Honeywell HMC5883L is a surface-mount, multi-chip module designed for low-field magnetic sensing with a digital interface for applications such as low-cost compassing and magnetometry. Applications for the HMC5883L include Mobile Phones, Netbooks, Consumer Electronics, Auto Navigation Systems, and Personal Navigation Devices.

DL2308Mk03

1 x Adafruit METRO M0 Express
1 x DS3231 Precision RTC FeatherWing
1 x SparkFun Triple Axis Accelerometer ADXL335
1 x SparkFun Triple Axis Magnetometer – HMC5883L
1 x Rocker Switch – SPST
1 x Resistor 10K Ohm
1 x CR1220 3V Lithium Coin Cell Battery
1 x SparkFun Cerberus USB Cable

Adafruit METRO M0 Express

LED – LED_BUILTIN
SDA – Digital 20
SCL – Digital 21
SW1 – Digital 2
ACX – Analog A0
ACY – Analog A1
ACZ – Analog A2
VIN – +3.3V
GND – GND

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DL2308Mk03p.ino

/****** Don Luc Electronics © ******
Software Version Information
Project #28 - Sensors - Magnetometer HMC5883L - Mk02
28-02
DL2308Mk03p.ino
1 x Adafruit METRO M0 Express
1 x DS3231 Precision RTC FeatherWing
1 x SparkFun Triple Axis Accelerometer ADXL335
1 x Rocker Switch - SPST
1 x Resistor 10K Ohm
1 x CR1220 3V Lithium Coin Cell Battery
1 x SparkFun Cerberus USB Cable
*/

// Include the Library Code
// DS3231 Precision RTC 
#include <RTClib.h>
// Two Wire Interface (TWI/I2C)
#include <Wire.h>
// Keyboard
#include <Keyboard.h>
// Triple Axis Magnetometer
#include <HMC5883L.h>

// Keyboard
String sKeyboard = "";

// DS3231 Precision RTC 
RTC_DS3231 rtc;
String dateRTC = "";
String timeRTC = "";

// Accelerometer
int iX = A0;
int iY = A1;
int iZ = A2;
// Accelerometer
int X = 0;
int Y = 0;
int Z = 0;

// Triple Axis Magnetometer
HMC5883L compass;
// Triple Axis Magnetometer
int mX = 0;
int mY = 0;
int mZ = 0;

// The number of the pushbutton pin
int iButton = 2;
// Variable for reading the pushbutton status
int buttonState = 0;

// Software Version Information
String sver = "28-02";

void loop() {

  // Date and Time RTC
  isRTC ();

  // Accelerometer
  isAccelerometer();

  // Magnetometer
  isMagnetometer();

  // Read the state of the button value:
  buttonState = digitalRead(iButton);

  // Check if the button is pressed. If it is, the buttonState is HIGH:
  if (buttonState == HIGH) {

     Keyboard.println(sKeyboard);
    
  }

  // Delay 1 sec
  delay(1000);

}

getAccelerometer.ino

// Accelerometer
// Accelerometer
void isAccelerometer(){

  // Accelerometer X, Y, Z
  // X
  X = analogRead(iX);
  // Y
  Y = analogRead(iY);
  // Z
  Z = analogRead(iZ);

  sKeyboard = sKeyboard + String(X) + "|" + String(Y) + "|" + String(Z) + "|";

}

getMagnetometer.ino

// Magnetometer
// Setup Magnetometer
void isSetupMagnetometer(){

  // Magnetometer Serial
  // Initialize HMC5883L
  while (!compass.begin())
  {
    delay(500);
  }

  // Set measurement range
  // +/- 1.30 Ga: HMC5883L_RANGE_1_3GA (default)
  compass.setRange(HMC5883L_RANGE_1_3GA);

  // Set measurement mode
  // Continuous-Measurement: HMC5883L_CONTINOUS (default)
  compass.setMeasurementMode(HMC5883L_CONTINOUS);
 
  // Set data rate
  // 15.00Hz: HMC5883L_DATARATE_15HZ (default)
  compass.setDataRate(HMC5883L_DATARATE_15HZ);

  // Set number of samples averaged
  // 1 sample:  HMC5883L_SAMPLES_1 (default)
  compass.setSamples(HMC5883L_SAMPLES_1);
  
}
// Magnetometer
void isMagnetometer(){

  // Vector Norm
  Vector norm = compass.readNormalize();
  // Vector X, Y, Z
  // X Normalize
  mX = norm.XAxis;
  // Y Normalize
  mY = norm.YAxis;
  // Z Normalize
  mZ = norm.ZAxis;

  sKeyboard = sKeyboard + String(mX) + "|" + String(mY) + "|" + String(mZ) + "|*";

}

getRTC.ino

// Date & Time
// DS3231 Precision RTC
void setupRTC() {

  // DS3231 Precision RTC
  if (! rtc.begin()) {
    //Serial.println("Couldn't find RTC");
    //Serial.flush();
    while (1) delay(10);
  }

  if (rtc.lostPower()) {
    //Serial.println("RTC lost power, let's set the time!");
    // When time needs to be set on a new device, or after a power loss, the
    // following line sets the RTC to the date & time this sketch was compiled
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
    // This line sets the RTC with an explicit date & time, for example to set
    // January 21, 2014 at 3am you would call:
    //rtc.adjust(DateTime(2023, 8, 10, 11, 0, 0));
  }
  
}
// Date and Time RTC
void isRTC () {

  // Date and Time
  dateRTC = "";
  timeRTC = "";
  DateTime now = rtc.now();
  
  // Date
  dateRTC = now.year(), DEC; 
  dateRTC = dateRTC + "/";
  dateRTC = dateRTC + now.month(), DEC;
  dateRTC = dateRTC + "/";
  dateRTC = dateRTC + now.day(), DEC;

  Serial.print("Date: ");
  Serial.println(dateRTC);
  
  // Time
  timeRTC = now.hour(), DEC;
  timeRTC = timeRTC + ":";
  timeRTC = timeRTC + now.minute(), DEC;
  timeRTC = timeRTC + ":";
  timeRTC = timeRTC + now.second(), DEC;

  Serial.print("Time: ");
  Serial.println(timeRTC);

  sKeyboard = "SEN|" + sver + "|" + String(dateRTC) + "|" + 
  String(timeRTC) + "|";
  
}

setup.ino

// Setup
void setup()
{
  
  // Give display time to power on
  delay(100);
  
  // Wire - Inialize I2C Hardware
  Wire.begin();

  // Give display time to power on
  delay(100);

  // Date & Time RTC
  // DS3231 Precision RTC 
  setupRTC();
  
  // Initialize control over the keyboard:
  Keyboard.begin();

  // Setup Triple Axis Magnetometer
  isSetupMagnetometer();

  // Initialize the button pin as an input
  pinMode(iButton, INPUT);

  // Initialize digital pin LED_BUILTIN as an output
  pinMode(LED_BUILTIN, OUTPUT);
  // Turn the LED on HIGH
  digitalWrite(LED_BUILTIN, HIGH);

  delay( 5000 );

}

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