Laminar

The Aerium Laminar is a compact digital airspeed sensor based on the proven 4525DO differential pressure sensor. It provides accurate, temperature-compensated airspeed measurements for unmanned and embedded systems.

Laminar supports both direct I2C connectivity and UAVCAN, allowing flexible integration with a wide range of PX4 and ArduPilot flight controllers.

General

• Compact digital airspeed sensor for unmanned and embedded systems.
• Built around the 4525DO differential pressure sensor.
• Accurate, temperature-compensated airspeed measurements.

Compatibility

• PX4 flight controllers.
• ArduPilot flight controllers.
• Flight controllers with direct I2C airspeed sensor support.
• Flight controllers with UAVCAN airspeed sensor support.

Resources

• 3D CAD Model

Mechanical

• Dimensions: 24 mm × 20 mm
• Mounting holes: M3, spaced 18 mm × 14 mm
• Weight: ~8 g

Electrical

General

• Input voltage: 5 V
• Logic level: 3.3 V

Pinout

Main Connector

• The main connector features a flexible interface configuration.
• The configuration is set using solder jumpers. by default the board is set to CAN

• Connector Definition

  Type	Part Number	Part Name
  Board Connector	SM04B-GHS-TB	JST-GH
  Cable Connector	GHR-04V-S	JST-GH

• Connector Pinout

  Pin	Name
  1	Power Output (5 V)
  2	CAN_H (logic 3.3v)
  3	CAN_L (logic 3.3v)
  4	GND

• Solder Jumper configuration

• Connector Definition

  Type	Part Number	Part Name
  Board Connector	SM04B-GHS-TB	JST-GH
  Cable Connector	GHR-04V-S	JST-GH

• Connector Pinout

  Pin	Name
  1	Power Output (5 V)
  2	SCL - I2C clock (logic 3.3v)
  3	SDA - I2C data (logic 3.3v)
  4	Ground

• Solder Jumper configuration

Software

Configuration Steps

• Autopilot Configuration

  • PX4 - https://docs.px4.io/main/en/sensor/airspeed
  • Ardupilot - https://ardupilot.org/plane/docs/airspeed.html

• Address Configuration

  • I2C
    • the I2C address of the device is fixed by hardware.
  • CAN
    • The CAN address is 0 by default (auto assign by the autopilot)
    • The address can be be set to manual/static using the following instructions
      • PX4
        • Connect the Laminar to the autopilot
        • Open QGroundControl
        • Open Main Menu -> Analyze tTools -> Mavlink Console
        • Type in the console 'uavcan status' to get the device auto assigned address.

          uavcan status
        • Type in the console:

          uavcan param set <current device address> CANNODE_NODE_ID <desired device address>
        • reboot the device
        • Type in the console 'uavcan status' to verify the device address.

          uavcan status
      • Ardupilot
        • Use the following instructions - https://ardupilot.org/copter/docs/common-slcan-f7h7.html
        • Using Mission Planner, set the CANNODE_NODE_ID parameter to the desired address
        • reboot the device