Quick Start Guide
I2C Airspeed Sensor Configuration
Mission Planner Configuration
Step 1: Enable the Airspeed Sensor
- Connect to your autopilot via Mission Planner
- Navigate to Setup → Mandatory Hardware → Airspeed
- Select SDP3X from the dropdown menu (or select the generic differential pressure sensor option)
- Click Refresh Params to load default parameters
note
The SDP3x is a high-precision differential pressure sensor with excellent stability and low power consumption. It's available in both I2C and DroneCAN variants.
Step 2: Configure Core Parameters
In Config → Full Parameter List, search for and set these parameters:
| Parameter | Value | Description |
|---|---|---|
ARSPD_TYPE | 9 | SDP3X sensor type |
ARSPD_PIN | -1 | Not used for I2C sensors (set to -1) |
ARSPD_USE | 1 | Enable airspeed sensor use |
ARSPD_OFFSET | 0 | Calibrated zero offset (set during calibration) |
ARSPD_BUS | 0 | I2C bus number (typically 0 for internal I2C) |
ARSPD_I2C_ADDR | 0x21 | I2C address for SDP3X (default: 0x21) |
tip
The SDP3X has an I2C address of 0x21 by default. If your sensor uses a different address, update ARSPD_I2C_ADDR accordingly. Check your sensor documentation for alternative addressing options.
DroneCAN Airspeed Sensor Configuration
Mission Planner Configuration
Step 1: Enable DroneCAN
- Navigate to Setup → Mandatory Hardware → CAN Bus Setup
- Select CAN1 or CAN2 (depending on your port)
- Set the following:
- CAN_P1_BITRATE:
1000000(1 Mbps, standard) - CAN_P1_DRIVER:
1(First CAN driver)
- CAN_P1_BITRATE:
- Click Save and Reboot
Step 2: Enable DroneCAN Airspeed
In Config → Full Parameter List, search for and set:
| Parameter | Value | Description |
|---|---|---|
ARSPD_TYPE | 8 | DroneCAN airspeed sensor |
ARSPD_USE | 1 | Enable airspeed sensor |
ARSPD_BUS | 0 | CAN bus number (0 for CAN1, 1 for CAN2) |
CAN_P1_BITRATE | 1000000 | CAN bus speed (1 Mbps standard) |
CAN_P2_BITRATE | 1000000 | Second CAN bus (if used) |