Skip to main content
Version: 0.12.0

How to add custom fragments to Cumulocity

Default fragments​

By default your device will send the following information to Cumulocity:

{
  "c8y_Agent": {
    "name": "thin-edge.io",
    "version": "x.x.x"
  }
}

You can change the name value using the tedge command as follows:

sudo tedge config set device.type VALUE

Custom fragments​

If you wish to add more fragments to Cumulocity, you can do so by populating {base_config_dir}/device/inventory.json. The default base_config_dir is /etc/tedge. See the link for more information about setting a custom base_config_dir.

An example inventory.json looks something like this:

file: /etc/tedge/device/inventory.json
{
  "c8y_RequiredAvailability": {
    "responseInterval": 5
  },
  "c8y_Firmware": {
    "name": "raspberrypi-bootloader",
    "version": "1.20140107-1",
    "url": "31aab9856861b1a587e2094690c2f6e272712cb1"
  },
  "c8y_Hardware": {
    "model": "BCM2708",
    "revision": "000e",
    "serialNumber": "00000000e2f5ad4d"
  }
}

To see the changes you need to restart the tedge-mapper. If you're using systemctl you can do:

sudo systemctl restart tedge-mapper-c8y

In the Cumulocity UI this will looks something like this:

Cumulocity custom fragments

For information on which fragments Cumulocity supports please see the Cumulocity API docs.