PX4 User Guide
  • Introduction
  • Getting Started
    • Basic Concepts
    • Vehicles/Frames
    • Flight Controllers
    • Sensors
    • Radio Systems
    • Flight Modes
    • Vehicle Status Notifications
      • LED Meanings
      • Tune/Sound Meanings
      • Preflight Checks
    • Payloads & Cameras
    • Flight Reporting
  • Basic Assembly
    • Mounting the Flight Controller
    • Mounting the GPS/Compass
    • Vibration Isolation
    • Cable Wiring
    • CUAV Pixhawk V6X Wiring QuickStart
    • CUAV V5+ Wiring Quickstart
    • CUAV V5 nano Wiring Quickstart
    • Holybro Pixhawk 6C Wiring Quickstart
    • Holybro Pixhawk 6X Wiring Quickstart
    • Holybro Pixhawk 5X Wiring Quickstart
    • Holybro Pixhawk 4 Wiring Quickstart - Discontinued
    • Holybro Pixhawk 4 Mini Wiring Quickstart - Discontinued
    • Holybro Durandal Wiring Quickstart
    • Holybro Pix32 v5 Wiring Quickstart
    • Cube Wiring Quickstart
    • Pixracer Wiring Quickstart
    • mRo (3DR) Pixhawk Wiring Quickstart
  • Standard Configuration
    • Firmware
    • Airframe
    • Sensor Orientation
    • Compass
    • Gyroscope
    • Accelerometer
    • Airspeed
    • Level Horizon Calibration
    • Radio Setup
    • Joystick Setup
    • Flight Modes
    • Battery
    • Safety
      • Failsafe Simulation
    • ESC Calibration
    • Actuators
    • Autotune
  • Vehicle Types & Setup
    • Multicopters
      • Multicopter Config/Tuning
        • MC Filter/Control Latency Tuning
        • MC PID Tuning (Manual/Basic)
        • MC PID Tuning Guide (Manual/Advanced)
        • MC Setpoint Tuning (Trajectory Generator)
          • MC Jerk-limited Type Trajectory
        • Multicopter Racer Setup
      • X500 v2 (Pixhawk 6C)
      • X500 v2 (Pixhawk 5X)
      • X500 (Pixhawk 4)
      • S500 V2 (Pixhawk 4)
      • DJI F450 (CUAV v5+)
      • DJI F450 (CUAV v5 nano)
      • QAV250 (Pixhawk4 Mini) - Discontinued
      • DJI F450 + RTK (Pixhawk 3 Pro)
      • QAV250 (Pixhawk Mini)
      • QAV-R 5" Racer (Pixracer)
      • Omnicopter
    • Planes
      • Fixed Wing Config/Tuning
        • Fixedwing PID Tuning Guide
        • Fixedwing Advanced Tuning Guide
        • Fixedwing Trimming Guide
      • Reptile Dragon 2 (ARK6X)
      • Turbo Timber Evolution (Pixhawk 4 Mini)
      • Wing Wing Z84 (Pixracer)
    • VTOL
      • VTOL Config/Tuning
        • QuadPlane Configuration
        • Back-transition Tuning
        • VTOL w/o Airspeed Sensor
        • VTOL Weather Vane
      • Standard VTOL
        • FunCub QuadPlane (Pixhawk)
        • Ranger QuadPlane (Pixhawk)
        • Falcon Vertigo QuadPlane (Dropix)
      • Tailsitter VTOL
        • Build: TBS Caipiroshka Tailsitter Build (Pixracer)
      • Tiltrotor VTOL
        • Build: Convergence Tiltrotor (Pixfalcon)
    • Airships (experimental)
    • Autogyros (experimental)
      • ThunderFly Auto-G2 (Holybro pix32)
    • Balloons (experimental)
    • Helicopter (experimental)
      • Helicopter Config/Tuning
    • Rovers (experimental)
      • Traxxas Stampede
    • Submarines (experimental)
      • BlueROV2
    • Airframes Reference
  • Flying
    • First Flight Guidelines
    • Flying 101
    • Missions
      • Package Delivery Mission
    • GeoFence
    • Safety Point Planning
    • Flight Modes
      • Position Mode (MC)
      • Altitude Mode (MC)
      • Manual/Stabilized Mode (MC)
      • Acro Mode (MC)
      • Orbit Mode (MC)
      • Position Mode (FW)
      • Altitude Mode (FW)
      • Stabilized Mode (FW)
      • Acro Mode (FW)
      • Manual Mode (FW)
      • Takeoff Mode
      • Land Mode
      • Return Mode
      • Hold Mode
      • Mission Mode
      • Follow Me Mode
      • Offboard Mode
    • Terrain Following/Holding
  • Flight Log Analysis
    • Log Analysis using Flight Review
    • Log Analysis using PlotJuggler
  • Advanced Configuration
    • Finding/Updating Parameters
    • Full Parameter Reference
    • ECL/EKF Overview & Tuning
    • Flight Termination Configuration
    • Bootloader Flashing onto Betaflight Systems
    • Land Detector Configuration
    • Prearm/Arm/Disarm Configuration
    • IMU Factory Calibration
    • Sensor Thermal Compensation
    • Compass Power Compensation
    • Advanced Controller Orientation
    • Static Pressure Buildup
    • Serial Port Configuration
    • MAVLink Telemetry (OSD/GCS)
    • PX4 Ethernet Setup
    • Bootloader Update
  • Hardware (Drones&Parts)
    • Complete Vehicles
      • ModalAI Starling
      • PX4 Vision Kit
      • MindRacer BNF & RTF
        • MindRacer 210
        • NanoMind 110
      • Holybro Kopis 2
      • Bitcraze Crazyflie 2.1
    • Flight Controllers (Autopilots)
      • Pixhawk Series
        • Silicon Errata
      • Pixhawk Standard Autopilots
        • CUAV Pixhawk V6X (FMUv6X)
        • Holybro Pixhawk 6X (FMUv6X)
        • Holybro Pixhawk 6C (FMUv6C)
        • Holybro Pixhawk 6C Mini(FMUv6C)
        • Holybro Pix32 v6 (FMUv6C)
        • Holybro Pixhawk 5X (FMUv5X)
        • Holybro Pixhawk 4 (FMUv5) - Discontinued
        • Holybro Pixhawk 4 Mini (FMUv5) - Discontinued
        • Drotek Pixhawk 3 Pro (FMUv4pro)
        • mRo Pixracer (FMUv4)
        • Hex Cube Black (FMUv3)
        • mRo Pixhawk (FMUv3)
        • Holybro Pixhawk Mini (FMUv3) - Discontinued
      • Manufacturer-Supported Autopilots
        • AirMind MindPX
        • AirMind MindRacer
        • ARK Electronics ARKV6X
        • CUAV X7
        • CUAV Nora
        • CUAV V5+ (FMUv5)
        • CUAV V5 nano (FMUv5)
        • CUAV Pixhack v3 (FMUv3)
        • CubePilot Cube Orange+ (CubePilot)
        • CubePilot Cube Orange (CubePilot)
        • CubePilot Cube Yellow (CubePilot)
        • Holybro Kakute H7v2
        • Holybro Kakute H7mini
        • Holybro Kakute H7
        • Holybro Durandal
        • Holybro Pix32 v5
        • ModalAI Flight Core v1
        • ModalAI VOXL Flight
        • ModalAI VOXL 2
        • mRobotics-X2.1 (FMUv2)
        • mRo Control Zero F7)
        • NXP RDDRONE-FMUK66 FMU
        • Sky-Drones AIRLink
        • SPRacing SPRacingH7EXTREME
        • ThePeach FCC-K1
        • ThePeach FCC-R1
      • Experimental Autopilots
        • BeagleBone Blue
        • Raspberry Pi 2/3 Navio2
        • Raspberry Pi 2/3/4 PilotPi
          • PilotPi with Raspberry Pi OS
          • PilotPi with Ubuntu Server
      • Discontinued Autopilots/Vehicles
        • Drotek Dropix (FMUv2)
        • Omnibus F4 SD
        • BetaFPV Beta75X 2S Brushless Whoop
        • Bitcraze Crazyflie 2.0
        • Aerotenna OcPoC-Zynq Mini
        • CUAV v5
        • Holybro Kakute F7 (Discontinued)
        • Holybro Pixfalcon
        • Holybro pix32 (FMUv2)
        • mRo AUAV-X2
        • 3DR Pixhawk 1
        • Snapdragon Flight
        • Intel® Aero RTF Drone (Discontinued)
      • Pixhawk Autopilot Bus (PAB) & Carriers
        • ARK Electronics Pixhawk Autopilot Bus Carrier
    • Flight Controller Peripherals
      • ADSB/FLARM (Traffic Avoidance)
      • Air Traffic Avoidance: ADSB/FLARM
      • Air Traffic Avoidance: UTM
      • Airspeed Sensors
        • TFSlot Airspeed Sensor
      • Barometers
      • Camera
      • Distance Sensors (Rangefinders)
        • Lightware SFxx Lidar
        • Ainstein US-D1 Standard Radar Altimeter
        • LeddarOne Lidar
        • Benewake TFmini Lidar
        • Lidar-Lite
        • TeraRanger
        • Lanbao PSK-CM8JL65-CC5
        • Avionics Anonymous Laser Altimeter UAVCAN Interface
      • ESCs & Motors
        • PWM ESCs and Servos
        • DShot ESCs
        • OneShot ESCs and Servos
        • DroneCAN ESCs
          • Zubax Telega
          • PX4 Sapog ESC Firmware
            • Holybro Kotleta
            • Zubax Orel
        • VESC
      • TBS Crossfire (CRSF) Telemetry
      • FrSky Telemetry
      • Gimbal (Mount) Configuration
      • GPS/Compass
        • ARK GPS
        • Holybro DroneCAN M8N GPS
        • LOCOSYS Hawk A1 GNSS
        • Hex Here2
        • Holybro M8N & M9N GPS
        • Sky-Drones SmartAP GPS
      • Grippers
        • Servo Gripper
      • Optical Flow
        • ARK Flow
        • PMW3901
        • PX4FLOW (Deprecated)
      • Precision Landing
      • Parachute
      • Power Modules/PDB
        • CUAV HV pm
        • CUAV CAN PMU
        • Holybro PM02
        • Holybro PM07
        • Holybro PM06 V2
        • Holybro PM02D (digital)
        • Holybro PM03D (digital)
        • Pomegranate Systems Power Module
        • Sky-Drones SmartAP PDB
      • Satellite Coms (Iridium/RockBlock)
      • Telemetry Radios
        • SiK Radio
          • RFD900 (SiK) Telemetry Radio
          • HolyBro (SIK) Telemetry Radio
        • Telemetry Wifi
          • ESP8266 WiFi Module
          • ESP32 WiFi Module
          • 3DR Telemetry Wifi (Discontinued)
        • Microhard Serial Telemetry Radio
          • ARK Electron Microhard Serial Telemetry Radio
          • Holybro Microhard P900 Telemetry Radio
        • CUAV P8 Telemetry Radio
        • HolyBro XBP9X - Discontinued
      • RTK GPS
        • ARK RTK GPS
        • RTK GPS Heading with Dual u-blox F9P
        • CUAV C-RTK
        • CUAV C-RTK2 PPK/RTK GNSS
        • CUAV C-RTK 9Ps
        • Femtones MINI2 Receiver
        • Freefly RTK GPS
        • Holybro H-RTK-F9P
        • Holybro H-RTK-M8P
        • Holybro H-RTK Unicore UM982 GPS
        • Locosys Hawk R1
        • Locosys Hawk R2
        • Septentrio AsteRx-RIB
        • Septentrio mosaic-go
        • Trimble MB-Two
        • CubePilot Here+ (Discontined)
      • Remote ID
      • Smart Batteries
        • Rotoye Batmon Battery Smartification Kit
      • Tachometers (Revolution Counters)
        • ThunderFly TFRPM01 Tachometer Sensor
      • I2C Peripherals
        • I2C bus accelerators
        • TFI2CADT01 I2C address translator
      • CAN Peripherals
      • DroneCAN Peripherals
        • PX4 DroneCAN Firmware
        • ARK CANnode
    • Companion Computers
      • Pixhawk + Companion Setup
        • RasPi Pixhawk Companion
      • Companion Computer Peripherals
      • Holybro Pixhawk RPI CM4 Baseboard
      • Auterion Skynode
      • Computer Vision
        • Obstacle Avoidance
        • Safe Landing
        • Collision Prevention
        • Path Planning Interface
        • Motion Capture (MoCap)
        • Visual Inertial Odometry (VIO)
          • Realsense T265 Tracking Camera (VIO)
      • Video Streaming
  • Development
    • Getting Started
      • Recommended Hardware/Setup
      • Toolchain Installation
        • MacOS Setup
        • Ubuntu Setup
        • Windows Setup
        • Visual Studio Code IDE
        • Other/Generic Tools
      • Building the Code
      • Writing your First Application
      • Application/Module Template
    • Concepts
      • PX4 Architecture
      • PX4 Flight Stack Architecture
        • Controller Diagrams
      • Events Interface
      • Flight Modes
      • Flight Tasks
      • Control Allocation
      • PWM limit state machine
      • System Startup
      • SD Card Layout
    • Simulation
      • jMAVSim Simulation
        • Multi-Vehicle Sim with JMAVSim
      • Gazebo Simulation
        • Vehicles
        • Multi-Vehicle Sim
      • Gazebo Classic Simulation
        • Vehicles
        • Worlds
        • Multi-Vehicle Sim
      • FlightGear Simulation
        • FlightGear Vehicles
        • Multi-Vehicle Sim with FlightGear
      • JSBSim Simulation
      • AirSim Simulation
      • Multi-Vehicle Simulation
      • Simulate Failsafes
      • HITL Simulation
      • Simulation-In-Hardware
    • Hardware
      • Flight Controller Reference Design
      • Manufacturer’s Board Support Guide
      • Flight Controller Porting Guide
        • PX4 Board Configuration (kconfig)
        • NuttX Board Porting Guide
      • Serial Port Mapping
      • Airframes
        • Adding a New Airframe
      • Device Drivers
      • Telemetry Radio
        • SiK Radio
      • Sensor and Actuator I/O
        • DroneCAN
        • I2C Bus
        • UART/Serial Ports
          • Port-Configurable Serial Drivers
      • RTK GPS (Integration)
    • Middleware
      • uORB Messaging
      • uORB Graph
      • uORB Message Reference
        • ActionRequest
        • ActuatorArmed
        • ActuatorControlsStatus
        • ActuatorMotors
        • ActuatorOutputs
        • ActuatorServos
        • ActuatorServosTrim
        • ActuatorTest
        • AdcReport
        • Airspeed
        • AirspeedValidated
        • AirspeedWind
        • AutotuneAttitudeControlStatus
        • BatteryStatus
        • ButtonEvent
        • CameraCapture
        • CameraStatus
        • CameraTrigger
        • CellularStatus
        • CollisionConstraints
        • CollisionReport
        • ControlAllocatorStatus
        • Cpuload
        • DebugArray
        • DebugKeyValue
        • DebugValue
        • DebugVect
        • DifferentialPressure
        • DistanceSensor
        • Ekf2Timestamps
        • EscReport
        • EscStatus
        • EstimatorAidSource1d
        • EstimatorAidSource2d
        • EstimatorAidSource3d
        • EstimatorBias
        • EstimatorBias3d
        • EstimatorEventFlags
        • EstimatorGpsStatus
        • EstimatorInnovations
        • EstimatorSelectorStatus
        • EstimatorSensorBias
        • EstimatorStates
        • EstimatorStatus
        • EstimatorStatusFlags
        • Event
        • FailsafeFlags
        • FailureDetectorStatus
        • FollowTarget
        • FollowTargetEstimator
        • FollowTargetStatus
        • GeneratorStatus
        • GeofenceResult
        • GimbalControls
        • GimbalDeviceAttitudeStatus
        • GimbalDeviceInformation
        • GimbalDeviceSetAttitude
        • GimbalManagerInformation
        • GimbalManagerSetAttitude
        • GimbalManagerSetManualControl
        • GimbalManagerStatus
        • GpioConfig
        • GpioIn
        • GpioOut
        • GpioRequest
        • GpsDump
        • GpsInjectData
        • Gripper
        • HealthReport
        • HeaterStatus
        • HomePosition
        • HoverThrustEstimate
        • InputRc
        • InternalCombustionEngineStatus
        • IridiumsbdStatus
        • IrlockReport
        • LandingGear
        • LandingGearWheel
        • LandingTargetInnovations
        • LandingTargetPose
        • LaunchDetectionStatus
        • LedControl
        • LogMessage
        • LoggerStatus
        • MagWorkerData
        • MagnetometerBiasEstimate
        • ManualControlSetpoint
        • ManualControlSwitches
        • MavlinkLog
        • MavlinkTunnel
        • Mission
        • MissionResult
        • ModeCompleted
        • MountOrientation
        • NavigatorMissionItem
        • NormalizedUnsignedSetpoint
        • NpfgStatus
        • ObstacleDistance
        • OffboardControlMode
        • OnboardComputerStatus
        • OrbTest
        • OrbTestLarge
        • OrbTestMedium
        • OrbitStatus
        • ParameterUpdate
        • Ping
        • PositionControllerLandingStatus
        • PositionControllerStatus
        • PositionSetpoint
        • PositionSetpointTriplet
        • PowerButtonState
        • PowerMonitor
        • PpsCapture
        • PwmInput
        • Px4ioStatus
        • QshellReq
        • QshellRetval
        • RadioStatus
        • RateCtrlStatus
        • RcChannels
        • RcParameterMap
        • Rpm
        • RtlTimeEstimate
        • SatelliteInfo
        • SensorAccel
        • SensorAccelFifo
        • SensorBaro
        • SensorCombined
        • SensorCorrection
        • SensorGnssRelative
        • SensorGps
        • SensorGyro
        • SensorGyroFft
        • SensorGyroFifo
        • SensorHygrometer
        • SensorMag
        • SensorOpticalFlow
        • SensorPreflightMag
        • SensorUwb
        • SensorSelection
        • SensorsStatus
        • SensorsStatusImu
        • SystemPower
        • TakeoffStatus
        • TaskStackInfo
        • TecsStatus
        • TelemetryStatus
        • TiltrotorExtraControls
        • TimesyncStatus
        • TrajectoryBezier
        • TrajectorySetpoint
        • TrajectoryWaypoint
        • TransponderReport
        • TuneControl
        • UavcanParameterRequest
        • UavcanParameterValue
        • UlogStream
        • UlogStreamAck
        • UwbDistance
        • UwbGrid
        • VehicleAcceleration
        • VehicleAirData
        • VehicleAngularAccelerationSetpoint
        • VehicleAngularVelocity
        • VehicleAttitude
        • VehicleAttitudeSetpoint
        • VehicleCommand
        • VehicleCommandAck
        • VehicleConstraints
        • VehicleControlMode
        • VehicleGlobalPosition
        • VehicleImu
        • VehicleImuStatus
        • VehicleLandDetected
        • VehicleLocalPosition
        • VehicleLocalPositionSetpoint
        • VehicleMagnetometer
        • VehicleOdometry
        • VehicleOpticalFlow
        • VehicleOpticalFlowVel
        • VehicleRatesSetpoint
        • VehicleRoi
        • VehicleStatus
        • VehicleThrustSetpoint
        • VehicleTorqueSetpoint
        • VehicleTrajectoryBezier
        • VehicleTrajectoryWaypoint
        • VtolVehicleStatus
        • Wind
        • YawEstimatorStatus
      • MAVLink Messaging
      • uXRCE-DDS (PX4-ROS 2/DDS Bridge)
    • Modules & Commands
      • Autotune
      • Commands
      • Communication
      • Controllers
      • Drivers
        • Airspeed Sensor
        • Baro
        • Distance Sensor
        • IMU
        • INS
        • Magnetometer
        • Optical Flow
        • Rpm Sensor
        • Transponder
      • Estimators
      • Simulations
      • System
      • Template
    • Debugging/Logging
      • FAQ
      • Consoles/Shells
        • MAVLink Shell
        • System Console
      • Debugging with GDB
        • SWD Debug Port
        • JLink Probe
        • Black Magic/DroneCode Probe
        • STLink Probe
        • Hardfault Debugging
      • Debugging with Eclipse
      • Failure Injection
      • Sensor/Topic Debugging
      • Simulation Debugging
      • Sending Debug Values
      • System-wide Replay
      • Profiling
      • Binary Size Profiling
      • Logging
      • Flight Log Analysis
      • ULog File Format
    • Tutorials
      • Long-distance Video Streaming
      • Connecting an RC Receiver on Linux
    • Advanced Topics
      • Parameters & Configs
      • Package Delivery Architecture
      • Computer Vision
        • Motion Capture (VICON, Optitrack, NOKOV)
      • Installing driver for Intel RealSense R200
      • Switching State Estimators
      • Out-of-Tree Modules
      • STM32 Bootloader
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        • CentOS Linux
        • Arch Linux
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    • Platform Testing and CI
      • Test Flights
        • Test MC_01 - Manual Modes
        • Test MC_02 - Full Autonomous
        • Test MC_03 - Auto Manual Mix
        • Test MC_04 - Failsafe Testing
        • Test MC_05 - Indoor Flight (Manual Modes)
      • Unit Tests
      • Continuous Integration
      • MAVSDK Integration Testing
      • ROS Integration Testing
      • Docker Containers
      • Maintenance
  • Drone Apps & APIs
    • Offboard Control from Linux
    • ROS
      • ROS 2
        • ROS 2 User Guide
        • ROS 2 Offboard Control Example
        • ROS 2 Multi Vehicle Simulation
      • ROS 1 with MAVROS
        • ROS/MAVROS Installation Guide
        • ROS/MAVROS Offboard Example (C++)
        • ROS/MAVROS Offboard Example (Python)
        • ROS/MAVROS Sending Custom Messages
        • ROS/MAVROS with Gazebo Classic Simulation
        • Gazebo Classic OctoMap Models with ROS 1
        • ROS/MAVROS Installation on RPi
        • External Position Estimation (Vision/Motion based)
    • DroneKit
  • Contribution (&Dev Call)
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    • 1.14
    • 1.13
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Powered by GitBook
On this page
  • Developer Quick Start
  • OS Image
  • First boot
  • Setting up OS
  • Building the code
  • Post-configuration
  1. Hardware (Drones&Parts)
  2. Flight Controllers (Autopilots)
  3. Experimental Autopilots
  4. Raspberry Pi 2/3/4 PilotPi

PilotPi with Ubuntu Server

PreviousPilotPi with Raspberry Pi OSNextDiscontinued Autopilots/Vehicles

Last updated 1 year ago

:::warning Ubuntu Server on RPi 4B consumes a lot of current and generates a lot of heat. Design for better heat dissipation and high power consumption when using this hardware. :::

Developer Quick Start

OS Image

Both armhf and arm64 arch are supported.

armhf

arm64

Latest OS

Please refer to official page for any new updates.

First boot

When setting up RaPi's WiFi for the first time we recommended using a wired Ethernet connection between your home router and RPi, and a monitor and keyboard.

Before booting

Now plug the SD card onto your Pi and boot for the first time. Make sure you have shell access to the RPi - either SSH connection over wired Ethernet, or direct accessing with keyboard and monitor.

WiFi region

First install required package:

sudo apt-get install crda
sudo nano /etc/default/crda

Then your Pi will able to join your WiFi network after reboot.

Hostname and mDNS

Let's set up hostname at first.

sudo nano /etc/hostname

Change the hostname to whatever you like. Then install the package required by mDNS:

sudo apt-get update
sudo apt-get install avahi-daemon

Perform a reboot.

sudo reboot

Regain the accessibility through WiFi connection after the above operation.

ssh ubuntu@pi_hostname.local

Password-less Auth (Optional)

Setting up OS

config.txt

The corresponding file in Ubuntu is /boot/firmware/usercfg.txt.

sudo nano /boot/firmware/usercfg.txt

Replace the file with:

# enable sc16is752 overlay
dtoverlay=sc16is752-spi1
# enable I2C-1 and set the frequency to 400KHz
dtparam=i2c_arm=on,i2c_arm_baudrate=400000
# enable spidev0.0
dtparam=spi=on
# enable RC input
enable_uart=1
# enable I2C-0
dtparam=i2c_vc=on
# switch Bluetooth to miniuart
dtoverlay=miniuart-bt

cmdline.txt

On Ubuntu Server 20.04:

sudo nano /boot/firmware/cmdline.txt

On Ubuntu Server 18.04 or earlier, nobtcmd.txt and btcmd.txt should both be modified.

sudo nano /boot/firmware/nobtcmd.txt

Find console=/dev/ttyAMA0,115200 and remove that part to disable the login shell on serial interface.

Append isolcpus=2 after the last word. The whole file will then look like:

net.ifnames=0 dwc_otg.lpm_enable=0 console=tty1 root=LABEL=writable rootfstype=ext4 elevator=deadline rootwait fixrtc isolcpus=2

The above line tells the Linux kernel do not schedule any process on CPU core 2. We will manually run PX4 onto that core later.

Reboot and SSH onto your Pi.

Check UART interface:

ls /dev/tty*

There should be /dev/ttyAMA0, /dev/ttySC0 and /dev/ttySC1.

Check I2C interface:

ls /dev/i2c*

There should be /dev/i2c-0 and /dev/i2c-1

Check SPI interface:

ls /dev/spidev*

There should be /dev/spidev0.0.

rc.local

In this section we will configure the auto-start script in rc.local. Note that we need to create this file, as it is not present on a fresh Ubuntu OS.

sudo nano /etc/rc.local

Append the content below to the file:

#!/bin/sh

echo "25" > /sys/class/gpio/export
echo "in" > /sys/class/gpio/gpio25/direction
if [ $(cat /sys/class/gpio/gpio25/value) -eq 1 ] ; then
        echo "Launching PX4"
        cd /home/ubuntu/px4 ; nohup taskset -c 2 ./bin/px4 -d -s pilotpi_mc.config 2 &> 1 > /home/ubuntu/px4/px4.log &
fi
echo "25" > /sys/class/gpio/unexport

exit 0

Save and exit. Then set the correct permissions:

sudo chmod +x /etc/rc.local

:::note Don't forget to turn off the switch when it is not needed! :::

CSI camera

:::warning Enable CSI camera will stop anything works on I2C-0. :::

sudo nano /boot/firmware/usercfg.txt

Append the following line at the end of file:

start_x=1

Building the code

To get the very latest version onto your computer, enter the following command into a terminal:

git clone https://github.com/PX4/PX4-Autopilot.git --recursive

:::note This is all you need to do just to build the latest code. :::

Set RPi upload target

Set the IP (or hostname) of your RPi using:

export AUTOPILOT_HOST=192.168.X.X

or

export AUTOPILOT_HOST=pi_hostname.local

Additionally, we need to set the username:

export AUTOPILOT_USER=ubuntu

Build for armhf target

Build the executable file:

cd Firmware
make scumaker_pilotpi_default

Then upload it with:

make scumaker_pilotpi_default upload

Alternative build method for armhf (using docker)

Execute the command in firmware folder:

./Tools/docker_run.sh "export AUTOPILOT_HOST=192.168.X.X; export AUTOPILOT_USER=ubuntu; export NO_NINJA_BUILD=1; make scumaker_pilotpi_default upload"

:::note mDNS is not supported within docker. You must specify the correct IP address every time when uploading. :::

:::note If your IDE doesn't support ninja build, NO_NINJA_BUILD=1 option will help. You can compile without uploading too. Just remove upload target. :::

It is also possible to just compile the code with command:

./Tools/docker_run.sh "make scumaker_pilotpi_default"

Build for arm64 target

:::note This step requires aarch64-linux-gnu tool-chain to be installed. :::

Build the executable file:

cd PX4-Autopilot
make scumaker_pilotpi_arm64

Then upload it with:

make scumaker_pilotpi_arm64 upload

Alternative build method for arm64 (using docker)

Execute the command in PX4-Autopilot folder:

./Tools/docker_run.sh "export AUTOPILOT_HOST=192.168.X.X; export AUTOPILOT_USER=ubuntu; export NO_NINJA_BUILD=1; make scumaker_pilotpi_arm64 upload"

:::note mDNS is not supported within docker. You must specify the correct IP address every time when uploading. :::

:::note If your IDE doesn't support ninja build, NO_NINJA_BUILD=1 option will help. You can compile without uploading too - just remove the upload target. :::

It is also possible to just compile the code with command:

./Tools/docker_run.sh "make scumaker_pilotpi_arm64"

Manually run PX4

Connect over SSH and run it with:

cd px4
sudo taskset -c 2 ./bin/px4 -s pilotpi_mc.config

Now PX4 is started with multi-rotor configuration.

If you encountered the similar problem executing bin/px4 on your Pi as following:

bin/px4: /lib/xxxx/xxxx: version `GLIBC_2.29' not found (required by bin/px4)

Then you should compile with docker instead.

Before proceeding to next step, clear the existing building at first:

rm -rf build/scumaker_pilotpi_*

Then go back to the corresponding chapter above.

Post-configuration

Mount the SD card onto your computer and modify the network settings. Please follow the official instruction .

Edit the file /etc/default/crda to change the correct WiFi region.

You may want to setup as well.

If you are compiling for the first time with docker, please refer to the .

If you are compiling for the first time with docker, please refer to the .

Please refer to the instructions

Ubuntu Server 18.04.5 for RPi2
Ubuntu Server 18.04.5 for RPi3
Ubuntu Server 18.04.5 for RPi4
Ubuntu Server 20.04.1 for RPi 2/3/4
Ubuntu Server 18.04.5 for RPi3
Ubuntu Server 18.04.5 for RPi4
Ubuntu Server 20.04.1 for RPi 3/4
cdimage
here
Reference List
passwordless auth
here
official docs
official docs