MatekSys ASPD-AUAV Digital AirSpeed Sensor for ArduPilot RC Aircraft, DroneCAN CAN/I2C/UART (MSP)

Description

Overview

Matek ASPD-AUAV is a digital airspeed sensor designed for RC aircraft using ArduPilot firmware. It is based on the AUAV-L30D sensor and supports CAN (DroneCAN protocol), I2C, and UART (MSP) interfaces.

Key Features

• ArduPilot AP_Periph L431 CAN node
• Interfaces: CAN + I2C + UART (TX2, MSP protocol)
• Connectors:
  • CAN JST-GH connector, DroneCAN protocol
  • I2C JST-GH connector, AUAV-L30D I2C mode
• Status LEDs:
  • CAN bootloader LED (Blue): fast blinking = AP_Periph bootloader; slow blinking = CAN node ready
  • 3.3V power LED (Red)
• CAN bus is described as the most common connection method for reliable communication with the flight controller
• Image text (value graph) labels: ASPD-AUAV(L30D) and ASPD-DLVR(L10D); legend shows:
  • ARSP[0] Airspeed (Min: 0.05 Max: 12.38 Mean: 2.99)
  • ARSP[1] Airspeed (Min: 0.32 Max: 12.54 Mean: 3.09)

Specifications

Input voltage range	4.5~5.5V
Power consumption	26mA
Operating temperatures	-30C to 85C
Pressure range	7500Pa ( 30 inH2O)
Burst pressure	103kPa
Speed range	400 km/h (111 m/s)
Dimensions	36mm*32mm*7.3mm
Weight	5g

Whats Included

• 1x ASPD-AUAV
• 2x JST-GH-4P to JST-GH-4P 20cm silicon wire
• Pitot tube
• Clear silicon tubing 40cm

For customer service and product support, contact [email protected] or visit https://rcdrone.top/.

Applications

• RC aircraft airspeed sensing for ArduPilot-based builds
• DroneCAN/CAN, I2C, or UART (MSP) integration with a flight controller

Wiring and ArduPilot Parameters

CAN	or	I2C	or	UART
ASPD-AUAV	FC		ASPD-DUAV	FC		ASPD-DUAV	FC
5V CANH CANL G	4.5-5.5V CAN High CAN Low GND		5V SCL SDA G	4.5-5.5V SCL SDA GND		5V G TX2	4.5-5.5V GND spare UART_RX
ARSPD*_USE ARSPD*_TYPE	1 8 (UAVCAN)		ARSPD*_USE ARSPD*_TYPE	1 19 (AUAV-30in)		ARSPD*_USE ARSPD*_TYPE	1 14 (MSP)
				SERIAL*_BAUD SERIAL*_PROTOCOL	115 (115200) 32 (MSP)

Tips (from provided text)

• CAN Baro is enabled by default. If the Baro integrated in AUAV is not used, set BARO_ENABLE = 0 in Mission Planner -> Initial Setup -> Optional Hardware -> UAVCAN -> MAVlink CANx -> Menu Parameters.
• ArduPilot has removed AUAV I2C support by default on flight controller with 1MB flash MCU(s) (such as F405, F745 series).
• Speed range 400km/h vs 227km/h
• AUAV has better offset in still air.

Manuals & Downloads

• Firmware: https://firmware.ardupilot.org/AP_Periph/latest/MatekL431-AUAV/
• AP_Periph README: https://github.com/ArduPilot/ardupilot/blob/master/Tools/AP_Periph/README.md
• DroneCAN protocol: https://dronecan.github.io/
• 3D STEP file: ASPD-AUAV_STEP.zip

Details

The ASPD-AUAV digital airspeed sensor output can be compared against another airspeed sensor trace to review reading changes over time.