> For the complete documentation index, see [llms.txt](https://docs.efento.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.efento.io/nb-iot-loggers/device-settings/device-time.md).

# Device time

In order to operate properly, Efento NB-IoT logger has to set its internal time. After successful network registration, the device will automatically fetch the time from the network. From now on, all the measurements taken by the device will have the timestamp assigned. If for any reason the device is not able to fetch the time from the network, it will try to connect to the Efento Cloud platform and get time from the server. The device automatically updates its time settings after each confirmable message sent to the server. The current time settings are provided by the server in the ACK.

{% hint style="warning" %}
**If the logger sends the data to the customer's server, each ACK sent to a confirmable message should contain the current timestamp. The timestamp will be used by the device to update its internal clock.**
{% endhint %}


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.efento.io/nb-iot-loggers/device-settings/device-time.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.