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What is the Settings Service?

The Golioth platform provides a flexible way for users to configure settings on each device in your fleet. You can change settings for you entire fleet of devices in a single operation, or make more targeted changes.

Settings describe how the device will operate. This is fundamentally different from LightDB State, which is valuable for describing the current state of the device. The Settings Service should be used for long-lived persistent settings data that affects your entire fleet, groups of devices, and of course single devices.

Settings Hierarchy

There is a hierarchy to apply settings for devices:

  1. A setting is always created at the project-level. The initial value applies to all devices of that project.
  2. Overriding a settings value at the blueprint-level will apply that new value to all devices that match the blueprint.
  3. Overriding a settings value at the device-level will apply the new value to that device only.

Pay attention to the precedence order of the overrides:

  • Device-level overrides will always override blueprint and project-level settings.
  • Blueprint-level overrides will always override project-level settings.

Use Cases

Here are some ideas on how a device's behaviors can be changed using settings without touching the devices.

  • Adjust logging levels
    • Adjust which log level a device or a group of devices is sending back to the Golioth servers. For example, change from the info log level to warn, error or debug.
  • Configure the sensor reading delay
    • With settings, the rate of sensor readings can be easily changed. It's possible to increase or decrease the time between readings.
  • Improve power consumption by adjust how frequently a cellular connection is used
    • Settings can be used to change interval between uploading sensor data via a cellular connection.
    • Remaining in deep-sleep longer by uploading less frequently can help improve the battery consumption.
  • Set a task trigger according to sensor readings
    • You may want to trigger some task to be executed based on a sensor reading that is not precicesly known when the device is installed. The Settings service allows this value to be adjusted remotely at any time.