# Retrieve latest sensor readings for multiple trackers

## Question

Is it possible to get a list of tracker IDs that have sensor data?

## Answer

You can retrieve latest readings using:

`tracker/sensor/readings/batch_list`

Note: this method works with a **list of tracker IDs that you provide** — it doesn't automatically return "all trackers that have sensor data".

To build a list of trackers that have readings:

1. Get the list of all trackers in the account.
2. Call `batch_list` for that list.
3. Filter out trackers with no readings.

## Links

* [`tracker/sensor/readings/batch_list`](/docs/navixy-api/user-api/backend-api/resources/tracking/tracker/readings.md#batch_list)
* [Sensor data guide](/docs/navixy-api/user-api/backend-api/guides/data-retrieval/sensor-data.md)


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