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# Rpm (UORB message)

**TOPICS:** rpm

## Fields

| Name                                      | Type      | Unit [Frame] | Range/Enum | Description                            |
| ----------------------------------------- | --------- | ------------ | ---------- | -------------------------------------- |
| <a id="fld_timestamp"></a>timestamp       | `uint64`  |              |            | time since system start (microseconds) |
| <a id="fld_rpm_estimate"></a>rpm_estimate | `float32` |              |            | filtered revolutions per minute        |
| <a id="fld_rpm_raw"></a>rpm_raw           | `float32` |              |            |

## Source Message

[Source file (GitHub)](https://github.com/PX4/PX4-Autopilot/blob/main/msg/Rpm.msg)

::: details Click here to see original file

```c
uint64 timestamp # time since system start (microseconds)

# rpm values of 0.0 mean within a timeout there is no movement measured
float32 rpm_estimate # filtered revolutions per minute
float32 rpm_raw
```

:::