ardupilot

Rover-4.2.1 was released as the stable version on 07-Jun-2022
https://discuss.ardupilot.org/t/rover-4-2-1-released/86542

Copter-4.2.1 was released as the stable version on 07-Jun-2022
https://discuss.ardupilot.org/t/copter-4-2-1-released/86541

Rover-4.2.0 was released as the stable version on 23-May-2022
https://discuss.ardupilot.org/t/rover-4-2-0-has-been-released/85860

Copter-4.2.0 was released as the stable version on 23-May-2022.
https://discuss.ardupilot.org/t/copter-4-2-0-has-been-released/85859

What's Changed

• fixed a bug in handling wrap in log download when 500 logs are on the microSD card
• added FlyingMoonF407 and FlyingMoonF427 support
• fixed RSSI input on the RCIN pin on CubeBlack and CubeOrange
• fixed update of gyro FFT throttle tracking
• removed unhealthy reporting on airspeed sensors with negative pressure as this commonly happens on VTOL takeoff
• improved handling of large LOITER_TURNS mission items, expanding maximum to 2.5km
• added fuel usage integration on Lutan EFI
• refuse arming in AUTO when in a landing sequence due to a failsafe
• account for sprung throttle (from RC_OPTIONS) in throttle suppression code
• improved safety of in-flight compass learning
• fixed automatic airspeed ratio calibration for 2nd airspeed sensor
• increase safety of GUIDED -> AUTO takeoff sequence used by QGC
• added CAN_Dx_UC_ESC_OF parameter for ESC offset for bandwidth efficiency
• fixed handling of safety state on boards with no safety switch
• fixed bug where a false positive could trigger landing disarm while land repositioning is active

https://discuss.ardupilot.org/t/plane-4-2-stable-release/84979

Copter-4.1.5 was released as the stable version on 19-Feb-2022
https://discuss.ardupilot.org/t/copter-4-1-5-released/82119

Rover-4.1.5 was released as the stable version on 19-Feb-2022
https://discuss.ardupilot.org/t/rover-4-1-5-released/82120

Rover-4.1.4 was released as the stable version on 08-Feb-2022
https://discuss.ardupilot.org/t/rover-4-1-4-released/81673/2

Rover-4.1.3 was released as the stable version on 01-Jan-2022
https://discuss.ardupilot.org/t/rover-4-1-3-released/80111/1

Copter-4.1.4 was released as the stable version on 08-Feb-2022
https://discuss.ardupilot.org/t/copter-4-1-4-released/81672

Copter-4.1.4 was release as the official version on 01-Jan-2022
https://discuss.ardupilot.org/t/copter-4-1-3-released/80110

Rover-4.1.2 was released as the official version on 07-Dec-2021
https://discuss.ardupilot.org/t/rover-4-1-2-released/79341

Rover-4.1.1 was released as the official version on 10-Nov-2021
https://discuss.ardupilot.org/t/rover-4-1-1-released/78229

Copter-4.1.2 was released as the official version on 07-Dec-2021.
https://discuss.ardupilot.org/t/copter-4-1-2-released/79340

Copter-4.1.1 was released as the official version on 10-Nov-2021.
https://discuss.ardupilot.org/t/copter-4-1-1-released/78267

Details of 4.1.x releases for plane here: https://discuss.ardupilot.org/t/plane-4-1-0-stable/76507

Release announcement: https://discuss.ardupilot.org/t/copter-4-1-0-released-as-the-official-default-version/76889

Release announcement: https://discuss.ardupilot.org/t/rover-4-1-0-released/76232

Release Announcement: https://discuss.ardupilot.org/t/copter-4-0-3-released/52975