Sodaq LoRa One

Install the IDE under Linux

Download the Arduino IDE (ArduinoIDE)
Make sure the kernel support ACM USB devices (CONFIG_USB_ACM=y)
Add board support to the IDE: File > Preferences > 'Additional Boards Manager URLs’. Enter 'http://downloads.sodaq.net/package_sodaq_samd_index.json'
Click on Tools > Board > Boards Manager… and install the "SODAQ SAMD Boards"
Select the "SODAQ ONE"
Now compile the code (SodaqOne-UniversalTracker-v3) and upload it to the board... Or just use the version that is already installed...

Setup of antenna, GPS and pins

Layout

Register the board with The Things Network

See Quick Start Guide for ttnctl
ttnctl user create [Your Email]
ttnctl user login [Your Email]
ttnctl applications create [Application Name]
ttnctl applications use [EUI]
ttnctl devices register personalized [DevEUI]
ttnctl subscribe

Setup the SodaqOne to send data to your application

Start the Arduino IDE and open the serial-monitor in the Tools menu. Configure the device with info you got in the previous paragraph.

Convert received data

Download source code and compiled java executable: Download.
Execute with "java -jar target/sodaqone-0.0.1-SNAPSHOT-jar-with-dependencies.jar D170A3574A33275E331FAC64EE023F0002000005FF"

package com.clueless.sodaqone;

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZoneOffset;

import lombok.extern.slf4j.Slf4j;

/**
* @author milo
*
*/
@Slf4j
public class Main {
   // Amsterdam Amstel train station
   // Lat : 52.3460135, 52° 20' 45.649"
   // Long: 4.9177772, 4° 55' 3.998"
   private static final String DEFAULT_DATA = "D170A3574A33275E331FAC64EE023F0002000005FF";

   /**
   * @param args - String[]
   */
   public static void main(String[] args) {
       log.debug("main: args='{}'", args.length > 0?args[0]:"");

       String data = DEFAULT_DATA;
       if (args.length > 0) data = args[0];

       Integer timeStamp = Integer.reverseBytes(new Long(Long.parseLong(data.substring(0, 8), 16)).intValue());
       LocalDateTime dateTime = LocalDateTime.ofEpochSecond(timeStamp, 0, ZoneOffset.UTC);
       dateTime = LocalDateTime.ofInstant(dateTime.toInstant(ZoneOffset.UTC), ZoneId.of("Europe/Amsterdam"));
       log.debug("Timestamp: {}", dateTime);

       int voltage = Integer.parseInt(data.substring(8, 10), 16);
       log.debug("Voltage: {}", 3.0 + voltage / 100.0);

       int temperature = Integer.parseInt(data.substring(10, 12), 16);
       log.debug("Temperature: {}", temperature);

       showCoord("lat", data.substring(12, 20));
       showCoord("lon", data.substring(20, 28));
   }

   private static void showCoord(String type, String coordString) {
       Integer coord = Integer.reverseBytes(new Long(Long.parseLong(coordString, 16)).intValue());
       int coordDegrees = coord / 10000000;
       int coordMinutes = new Double((coord / 10000000.0 - coordDegrees) * 60).intValue();
       BigDecimal coordSeconds = new BigDecimal(((coord / 10000000.0 - coordDegrees) * 60 - coordMinutes) * 60).setScale(3, RoundingMode.HALF_UP);
       log.debug("{}: {}, {}° {}' {}"", type, coord / 10000000.0, coordDegrees, coordMinutes, coordSeconds);
   }
}

Mosquitto MQTT broker

As soon as this al works it might be time to connect through 'mosquitto'.

ttnctl applications
mosquitto_sub -h staging.thethingsnetwork.org -t '+/devices/+/up' -u <EUI> -P 'Access Key'