Generate QR Code

End Devices

List QR Code Formats

To show supported QR code formats for end devices:

$ ttn-lw-cli end-devices list-qr-formats

Output:

{
  "formats": {
    "tr005draft3": {
      "name": "LoRa Alliance TR005 Draft 3",
      "description": "Standard QR code format defined by LoRa Alliance.",
      "field_mask": {
        "paths": [
          "claim_authentication_code.value",
          "ids.dev_eui",
          "ids.join_eui"
        ]
      }
    }
  }
}

The formats show the fields of the end device that are used in the QR code.

Generate QR Code for Identification

To generate a QR code for identification:

$ ttn-lw-cli end-devices generate-qr app1 dev1 --format-id tr005draft3

This saves the QR code to the current directory with the device ID as file name, in PNG format with a default size of 300 pixels. Use --folder and --size to change the save location and image size.

Device QR Code for Identification

Generate QR Code for Claiming

Device claiming is a mechanism to transfer devices securely from one application to another. For example, from a device maker to a device owner, or transferring ownership to new device owner.

When you create a device, you can generate a claim authentication code by specifying the --with-claim-authentication-code flag. You can also set a claim authentication code via CLI:

$ ttn-lw-cli end-devices set app1 dev1 --claim-authentication-code.value=ABCD

To generate a QR code for claiming:

$ ttn-lw-cli end-devices generate-qr app1 dev1 --format-id tr005draft3
Device QR Code for Claiming