In this tutorial you’re going to program the SODAQ ExpLoRer board using the Aurduino IDE. Follow this guide to program the SODAQ Explorer board and connect it to the The Thinks Network (TTN)

Important You must be within range of The Things Network coverage area or gateway. You can see the The Things Network Coverage Map to check coverage in your area or install your own LoRaWAN gateway connected to The Things Network. If you are not within The Things Network coverage area your device will not connect and transmit data to the The Things Network platform.

Linux Requirement

This applies to Linux ONLY Linux Users you may need to give your current user read/write access to the serial device file. This usually requires you to add the current user to a system group. These group names vary depending on the Linux distro that you’re using. Here are some examples for Ubuntu & Arch Linux.

Ubuntu Serial Access run this command in a terminal and REBOOT the machine

sudo usermod -a -G dialout $USER

Arch Linux Serial Access run this command in a terminal and REBOOT the machine

gpasswd -a $USER uucp
gpasswd -a $USER lock

Arduino Desktop IDE

Configure Arduino for the SODAQ ExpLoRer Libraries

  • Open Arduino IDE
  • Click File > Preferences
  • In the Additional Boards Manager URLs field enter this url to set the SODAQ Explorer board’s libraries
  • Click OK

Configure the SODAQ Board Libraries

Install Arduino the SODAQ Explorer Libraries via Board Manager

  • Click Tools > Board > Boards Manager
  • Type SODAQ in the filter text field
  • Click the Install buttons for each of the SODAQ devices listed

Install the SODAQ Board Libraries

Install The Things Network Arduino Libraries

Install the TTN arduino device libraries

  • Click Sketch > Include Library > Manage Libraries
  • Type The Things Network in the filter text field
  • Click the install button in the The Things Network Arduino Library section

Install the TTN Arduino Libraries

You can learn more about the TTN Arduino Library from the project’s github repo here

Install the Cayenne Low Power Payload (LPP) Libraries

Install the Cayenne LPP library in the Arduino IDE.

  • Click Sketch > Include Library > Manage Libraries
  • Type CayanneLPP in the filter text field
  • Click the install button in the CayenneLPP Arduino Library section

Install the CayenneLPP Arduino Libraries

Learn more about Cayenne LPP here

Select the SODAQ Explorer Board

  • Click Tools > Board > Boards Manager scroll down the menu find & click on the SODAQ Explorer option in the list

Select the SODAQ Board Libraries

Setup the Arduino Serial Port

The Serial Monitor enables you to interact, log & debug applications on connected devices. You will be using the Serial Monitor to get information from the connected device. At this point connect the micros usb to the device then to the computer. Next select the serial port in Arduino IDE.

Note The actual Port Names will vary between different Operating Systems. The screenshots below are from the Ubuntu OS.

  • Click Tools > Ports:> Select the USB port which should correspond to the connected device.

Setup Ardunino Serial Port

LoRaWAN requires information specific to individual devices in order for them to connect & function on LoRaWAN networks. You will use the Arduino Serial Monitor to get the device information that is required to register on The Things Network servers later in this tutorial.

  • Click Tools > Serial Monitor a window will open (Make sure your device is connected & you selected the correct USB Port)

Open Ardunino Serial Monitor

TTN SODAQ ExpLoRer Arduino Sketch/Code

The arduino platform maintains it’s source code in sketches which are files with a .ino extension. The code that we’re using for this tutorial can be found in the github repo

  • Download or Clone the examples repo so that you have the source code locally
  • Click File > Open browse to the location where you cloned the repo and open the hackiot_examples/ttn_sodaq_hackiot_reading/ttn_sodaq_hackiot_reading.ino file

You should see the codebase that we’ll be using for this tutorial in the IDE. In order to properly register & connect the device to TTN we will need some information from the SODAQ board such as the board’s DevEUI. Now you’ll compile & upload this example app to the SODAQ board via the ide. This example code will not function at this point because we’re missing keys for the TTN. In the next steps we’ll get the information from the device that’s required for registration on the TTN.

  • Click the Sketch > Upload

The application will be compiled and uploaded to the SODAQ board. You should see some similar success messages in the IDE’s terminal section.

Arduino Upload Success

In the Serial Monitor window you should start seeing information scrolling. Un-check the Auto Scroll check box to stop the auto scrolling. Manually scroll to the top of the Serial Monitor and record or copy the DevEUI value listed

Arduino Upload Success

Now that you have the DevEUI value for your device you can begin registering and connecting your device to The Things Network. The next section shows you how to register and connect your SODAQ device to TTN using LoRaWAN.

Register a The Things Network Account

If you don’t have a TTN account go over to the The Things Network website and register for an account. After registering and logging into your TTN account go to the TTN Console Dashboard

TTN Console

In this console you’ll need to create a new TTN Application which is essentially a container on the TTN platform and where you’ll register/associate your SODAQ board.

  • Go to the TTN Console Dashboard
  • Click Applications
  • Click Add Application
  • Enter a name for your Application. You can enter whatever you like here.
  • Enter a description for your app
  • Select the appropriate Handler from the list. These are based on the location your device will operate from.
    • Europe: ttn-handler-eu
    • USA: ttn-handler-us-west
    • Asia: ttn-handler-asia-se

TTN Add Application

TTN Set Application Payload Format - CayenneLPP

The Cayenne Low Power Payload (LPP) provides a convenient and easy way to send data over LPWAN networks such as LoRaWAN. The data transmitted to TTN is formatted using LPP and you must configure your newly created TTN Application to decode the data.

  • Click the Payloads Formats Tab
  • Select > Cayenne LPP in the dropdown box
  • Click Save button

TTN Add Application

TTN Register a Device

Now that you have created a new application we need to register a new device to the app which will provide the information you’ll need to program the SODAQ board and connect it to TTN via LoRaWAN.

  • Click the Device Tab
  • Click Register Device

TTN Register Device

  • Device ID: Enter a name for your device (this name is permanent and can not be changed after created)
  • DeviceEUI: Enter the DevEUI for your device that you recorded in previous steps from the Serial Monitor.
  • Click the Register button

TTN Register Device

After Clicking the Register button you will be redirected to the Device Overview console. Scroll down the Example Code section at the bottom of the page. There you will see variable definitions for the appEUI and appKey parameters. Copy these values, you’re going to need them when programming the SODAQ board. These values are used by TTN to identify and secure the data flowing between the device and TTN.

TTN Register Device

Program the Device

You now have all the information you need to program the SODAQ board to connect and transmit data to TTN. In this section you’ll update the ttn_sodaq_hackiot_reading.ino code with the latest values

  • Connect the device via USB to your computer
  • Open the ttn_sodaq_hackiot_reading.ino file in Arduino IDE

Replace the values of these variables:

  • const char *appEui = “< Enter your appEUI value from TTN >”;
  • const char *appKey = “< Enter your appKey value from TTN >”;

Ensure that you specify the correct LoRa frequency for your location. Europe: TTN_FP_EU868 USA: TTN_FP_US915

  • #define freqPlan TTN_FP_EU86

Your code is now ready to be compiled and uploaded to the device.

In the Arduino IDE:

-Click File > Upload or click the Upload toolbar button

Arduino Upload Button

The Arduino IDE’s console shows the status of the compilation and upload of the application to the device. Use the Serial Monitor in the Arduino IDE to view the devices activity & connection status to TTN platform.

Congratulations! The device is now running the code that you compiled. Next we’ll check the TTN dashboard to see actual LoRaWAN traffic being collected from your device.

Confirm the Device is Transmitting to The Things Network

Log into the TTN Portal and navigate to your TTN application and find your registered device. If the device is transmitting properly then you will see data in the TTN device portal within a few minutes as shown below.

TTN Device Payload View

Your device is now programmed to read and transmit it’s sensor data to the TTN platform for processing.

Stream IoT packets from Senet to Microshare

Follow this The Things Network (TTN) tutorial to set up a redirection of IoT packets to the Microshare platform.

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