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47 lines
2.5 KiB
Markdown
47 lines
2.5 KiB
Markdown
---
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pageClass: is-wide-page
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---
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# DifferentialPressure (UORB message)
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Differential-pressure (airspeed) sensor.
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This is populated by airspeed sensor drivers and used by the sensor module to calculate airspeed.
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The information is published in the `SCALED_PRESSURE_n` MAVLink messages (along with information from a corresponding `SensorBaro` instance).
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**TOPICS:** differential_pressure
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## Fields
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| Name | Type | Unit [Frame] | Range/Enum | Description |
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| ------------------------ | --------- | ------------ | ---------- | ------------------------------------------------------------------------- |
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| timestamp | `uint64` | us | | Time of publication (since system start) |
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| timestamp_sample | `uint64` | us | | Time of raw data capture |
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| device_id | `uint32` | | | Unique device ID for the sensor that does not change between power cycles |
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| differential_pressure_pa | `float32` | Pa | | Differential pressure reading (may be negative) |
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| temperature | `float32` | degC | | Temperature (Invalid: NaN if unknown) |
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| error_count | `uint32` | | | Number of errors detected by driver |
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## Source Message
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[Source file (GitHub)](https://github.com/PX4/PX4-Autopilot/blob/main/msg/DifferentialPressure.msg)
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::: details Click here to see original file
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```c
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# Differential-pressure (airspeed) sensor
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#
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# This is populated by airspeed sensor drivers and used by the sensor module to calculate airspeed.
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# The information is published in the `SCALED_PRESSURE_n` MAVLink messages (along with information from a corresponding `SensorBaro` instance).
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uint64 timestamp # [us] Time of publication (since system start)
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uint64 timestamp_sample # [us] Time of raw data capture
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uint32 device_id # [-] Unique device ID for the sensor that does not change between power cycles
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float32 differential_pressure_pa # [Pa] Differential pressure reading (may be negative)
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float32 temperature # [degC] [@invalid NaN if unknown] Temperature
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uint32 error_count # [-] Number of errors detected by driver
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```
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:::
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