For Holybro pixhawk 4. Which port should be connected to the digital air speed sensor 4525DO

ArduPlane Plane 3.9
1

I2C Buses
• the internal I2C port is bus 0 in ArduPilot (I2C3 in hardware)
• the port labelled I2CA is bus 3 in ArduPilot (I2C4 in hardware)
• the port labelled I2CB is bus 2 in ArduPilot (I2c2 in hardware)
• the port labelled GPS is bus 1 in ArduPilot (I2c1 in hardware)
ARSPD_BUS: Airspeed I2C bus
Note: This parameter is for advanced users
The bus number of the I2C bus to look for the sensor on
Values
Value Meaning
0 Bus0(internal)
1 Bus1(external)
2 Bus2(auxillary)

This is only possible on the port B for Holybro pixhawk 4 (Airspeed I2C bus = 2)

2

You can try I2C A, bus 3 (maybe master firmware)

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