NB-IoT Tutorials

NB-IoT Tutorials

Examples will be made for the following boards:

SODAQ ExpLoRer https://shop.sodaq.com/en/explorer.html
Arduino Zero / M0 https://www.arduino.cc/en/Guide/ArduinoZero
Arduino Leonardo https://www.arduino.cc/en/Guide/ArduinoLeonardoMicro

If you have an other board with the Arduino pinout, your board might also work. Ask your question on forum.sodaq.com.

Add Sodaq download url
Go to the library page to add the json to the Arduino IDE


Download the required libraries
Sketch -> Include Library -> Manage Libraries…

Install the SODAQ NB-IoT library

Install the SODAQ WDT ( WatchDog Timer ) library

Accelerometer NB-IoT shield

The first batch of the Sodaq NB-IoT shield was shipped with the LSM303C.
All other batches are shipped with the LSM303AGR.


Download the latest version of the Adafruit LSM303 library.
Update the I2C addresses inside the library  to:

 #define LSM303_ADDRESS_ACCEL (0x1D) // 0011001x
 #define LSM303_ADDRESS_MAG (0x1E) // 0011110x

All libraries can be found in Documents > Arduino > libraries

Go to folder Adafruit_LSM303DLHC
Open Adafruit_LSM303_U.h with a text editor and change the lines.


Download the Sodaq_LSM303AGR from the Arduino Library Manager or from our github.

/* Example for using the accelerometer with the Sodaq_LSM303AGR library */
/* The example is tested on an Arduino M0 and a Sodaq Explorer with a Sodaq NB-IoT shield */
/* This code prints accelerometer readings every second and registers whether the board is flipped by interrupt */
#include <Arduino.h>
#include <Sodaq_LSM303AGR.h>

Sodaq_LSM303AGR AccMeter;

// Print the debug information on the SerialUSB 
#define USB SerialUSB

// The interrupt pin for the Accelerometer is attached to D4
#define ACC_INT_PIN 4

// Threshold for interrupt trigger
double threshold = -0.8;
int now = millis();

void setup() {
    while ((!USB) && (millis() < 10000)) {
        // Wait 10 seconds for the Serial Monitor

    // Start the I2C bug


    // Enable the Accelerometer

    // Attach interrupt event fot the Accelerometer
    pinMode(ACC_INT_PIN, INPUT);
    attachInterrupt(ACC_INT_PIN, interrupt_event, RISING);

    // Enable interrupts on the SAMD 

    // If Z goes below threshold the interrupt is triggered
    AccMeter.enableInterrupt1(AccMeter.ZLow, threshold, 0, AccMeter.PositionRecognition);

void loop() {

    // Print sensor readings every second
    if ((now + 1000) < millis())
        now = millis();

void read_AccMeter()
    USB.print("x = ");

    USB.print("\ty = ");

    USB.print("\tz = ");

void interrupt_event()
    // Do not print in an interrupt event when sleep is enabled.
    USB.println("Board flipped");

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