PX4-Autopilot

• Matching QGroundControl release v2.9.6+
• Better support for full missions for VTOL airframes
• Pure tablet controlled flight by direct map interaction (in addition to normal missions, by just clicking points on the map)
• Battery failsafe
• Geofence GUI config support
• More flexible RC failsafe
• More flexible data link failsafe
• RSSI input supported on Pixracer
• RSSI input cleaned up on Pixhawk (will only report RSSI when actually connected)
• Local position estimator available for testing
• EKF2 estimator available for testing (not in default binary)
• Many minor improvements and bugfixes

This fixes a wrong lowpass filter constant for battery charge level estimation. This version is also currently available on the beta branch and can be flashed by selecting the advanced options in the flash dialog and then beta.

Correct QGC version: https://github.com/mavlink/qgroundcontrol/releases/tag/v2.9.5

This release introduces substantial improvements of the VTOL control and autonomy code, the estimation & control library, an initial version of EKF2 and dozens of general fixes and improvements.

This release does add some new functionality for Pixracer, but mostly addresses issues found by users:

• RTL: If the copter was facing away from home it would first drift off until it yawed towards home before flying back to home properly
• Yaw handling on multicopter: The multicopter used a code path shared with VTOL and was in a suboptimal yaw control mode
• Fixed wing: Large mixer configs were not loading correctly and aborted boot. Although not safety critical, it was locking out some fixed wing users from the last release
• Pixracer: Enable FrSky telemetry and MAVLink OSD telemetry by default on the TELEM2 (OSD) and FrSky ports
• Pixracer: Remove a glitch during system boot on the PWM lines
• Lots of other smaller fixes and improvements

This release includes minor fixes:

• FMUv2: Start baro on correct bus. This is a regression of the Pixracer integration and could lead to aborted boots
• All board: Ensure that UAVCAN_ENABLE param is always loaded.

This release defaults MAVLink to on via USB and only offers the NSH shell via USB when the microSD card is not plugged into the autopilot.

A second huge addition is the support for log downloads through the specialised log protocol and QGroundControl (USB on any flight controller and Wifi on Pixracer are supported).

It also includes various smaller improvements and bugfixes for all airframes and boards.

• Switch to CMake build system
• Significant improvements in the user model / interaction (requires QGroundControl v2.8.0 or newer, using a daily build is recommended)
• Full VTOL support for all three major VTOL design types enabled (Tailsitters, tiltrotors, plane + quad combination, all flight modes, still under heavy development)
• Rattitude mode for FPV racers: Combination of attitude and rate control
• Better altitude hold (significant improvements, but more improvements pending)
• Support for coaxial helicopters
• Full native SITL on Mac OS and Linux: http://dev.px4.io/simulation-sitl.html
• Snapdragon Flight support (there is a next-generation version currently being worked on)
• Autonomous takeoff and landing on runways for planes
• Full support for UAVCAN, including UAVCAN-enabled motor controllers and automatic Firmware upgrades via UAVCAN (if you connect an ESC to the system, it will always be auto-upgraded)
• New board architecture: FMUv4, with the Pixracer being the first board of the new generation: http://dev.px4.io/hardware-pixracer.html

This is the third v1.1.0 beta release with zero open issues for the release. This is purely for validation and will become the release unless major issues are discovered.

This RC2 fixes a boot issue with VTOL configurations and contains a number of other fixes and improvements

This release adds:

• CMake / Ninja build system
• Full UAVCAN support, including Firmware upgrades on the CAN nodes
• SITL for copters and VTOL
• Integration on the sensor level
• Separates the controller input state estimates from the true state estimates (which is important for the use of state estimates in areas where too much low passing / dampening of the output can lead to inaccuracies)
• Adds VTOL support for all flight modes
• Rattitude mode for FPV racing
• Assorted bug fixes and improvements

The v1.0.1 release adds an additional re-initialization routine to the fixed wing altitude controller ensuring it does not climb or loose altitude on the first switch to altitude control mode.

Initial release of the PX4 Flight Stack.

This release includes the last missing changes:

• Full UAVCAN support for the current release
• Fixed an issue in TECS where a missing reset could lead to an initial increase or decrease in altitude before the current / desired altitude was held
• Fixed low memory issues on FMUv1. Now not only normal operation but also HIL are back operational

The 2nd beta release addresses a few things addressed during testing:

• Fixed wing ALT / POS CTL: Fixed climb-out mode so that full pitch down doesn't resolve in a dive and full pitch up pulls up with max. throttle

UPGRADE TO LATEST QGROUNDCONTROL STABLE FOR CALIBRATING SENSORS

• Fixed wing improvements in altitude control and takeoff
• Improved magnetometer calibration
• General usability improvements

This release candidate is the first version suitable for wider beta testing.

• System does not set a home position any more when already armed and gaining GPS lock
• Missions containing relative altitude waypoints are verboten when no home is set (the system will complain and loiter)
• Fixes for the manual trim capability in manual override mode
• Improvements in the FX79 mixer
• Yaw control retained in high trottle situations for multicopters (@tumbili)
• HIL usability improvements (Mark Whitehorn)

• Fix multicopter full throttle yaw control issue
• Make L1 controller distance dependent on current velocity and L1 distance
• HIL fixes for fixed wing, improving HIL reliability greatly
• Improved default config for TBS Caipirinha
• New ALTCTL and POSCTL flight modes for fixed wing
• New STAB flight mode for multicopters
• ACRO switch used now to switch between MAN and STAB for planes and ACRO and STAB (man) for multicopters

• Fix a param indexing issue which made param retransmission over radio links unstable.