Sigfox - Downlink

TagoIO is ready to receive data from and send data to Sigfox devices. The downlink is used to send data back to the device every time it checks in — the data to be sent should be prepared prior to that check‑in. This article explains how to set up a downlink.

Downlink Diagram

Information about uplink can be found in this tutorial.

Downlink Setup​

The downlink sends responses from TagoIO to Sigfox, ensuring the data transition works correctly. The downlink configuration is separated into two parts:

1. TagoIO setup
2. Sigfox setup using the Sigfox Portal

Further setup steps for each part are covered below.

1. TagoIO setup​

1. Find your device that you just created by clicking on the Device (left menu), go to it, and click on the tab Configuration parameters;

2. Create a parameter for your device:

   • Key – type downlinkData
   • Value – the message you want to send to your Sigfox device (must have 8 bytes)
   • Click Save

   Example of 8 bytes downlinkData: 00000000ada1b2c3

3. Create an Authorization and use it in the Sigfox setup later.

   • If you already have created an authorization, you can just copy it.

   The Authorization should be generated by TagoIO by accessing the Service Authorization page; no additional parameters are needed.

2. Sigfox setup​

Go to the Sigfox portal and perform the following steps:

1. Click on Device Type;
2. After clicking Device type, the list of your devices will appear in Sigfox, choose one;
3. Click in the Callback button;
4. Click the New button;
5. Select the option Custom callback;
6. Configure the downlink.

CALLBACK CONFIGURATION

https://sigfox.middleware.tago.io/downlink

Headers: Add two rows in the Headers section inside the header and value fields:

[
  {
    "variable": "device",
    "value": "{device}",
    "group": "{time}"
  },
  {
    "variable": "data",
    "value": "{data}",
    "group": "{time}"
  },
  {
    "variable": "seqNumber",
    "value": "{seqNumber}",
    "group": "{time}"
  }
]

Your downlink integration is completed.

You can also send data from your Dashboard using the Input Form widget. A script to perform a write in the parameter tab must be created using the Analysis.