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An update campaign defines which device or devices receive a firmware update and the firmware image that is installed.

Defining campaigns: manifests and filters

A campaign is built around a manifest sent to the device and a filter that determines which devices receive the manifest.

Devices that receive a manifest may reject the update if it does not match the compatibility fields or rules defined in the manifest. This is to avoid firmware created for a specific model or for use by a particular vendor being updated on an incompatible or inappropriate device.

Tip: You may want to use the manifest tool to update a single device, or to upload the firmware and manifest to speed up the development cycle. See the manifest tool tutorial for details.

Campaign strategies

There are two campaign strategies: continuous and one-shot.

Continuous campaigns are suitable when you need to apply the same update to a changing pool of devices over a period of time. The campaign updates any known devices first, but stays open so new devices receive the update once they register.

One-shot campaigns are suitable for applying an update to a static group of devices. This could be a test group, a set of devices in a region, or a field trial.

For more information, see an explanation of filters or the Update service API documentation.

Network traffic

See the guide to network traffic for an example calculation of messages between the device and service during an update.