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I'll walk you through all the new features of Betaflight 3.1!
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Full Betaflight 3.1 playlist is here:
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Features covered include:
* Added F7 support.
* Dynamic IO / pin allocation via the Resource command.
* DSHOT support for F3 and F4. DSHOT150, 300, 600, and 1200 supported
* Full Floating Point Logic for flight behaviour
* Many new dynamic configurations (filters, setpoint weights etc.)
* Many code optimisations (faster pid speeds possible on F3 and F4)
* Support for KISS ESC telemetry (only with DSHOT)
* Added temperature and RPM to KISS ESC telemetry - @mikeller
* Added serial esc pass-through for KISS24 and CASTLE esc's
* Added Crossfire support for TBS receivers and associated telemetry
* Added additional OSD parameters like pids and power -
* Added unify smartaudio support
* Added MSP over Smartport
* Fixed JUMBO frame handling on VCP targets, so blackbox logs can be downloaded more quickly
* New "anti_gravity_threshold" and "anti_gravity_gain" parameter to improve stability in fast changing G forces during flight. This applies to quick throttle jumps where multirotor can go through weightless transitions. In these cases the iterm can cause unwanted effects like pitching up or yawing due to strong changes in accumulation polarities.
* Protection against selecting motor protocols that are too slow (e.g. when ONESHOT125 is selected the maximum allowed PID and motor update frequency will be 2kHz)
* Added new level sensitivity and level limit parameters in degrees. level_limit is the maximum allowed angle. Level_sensitivity is the max deflection on full stick @borisbstyle
* Added IRC Tramp VTX support. Changable channel, band, power and pitmode @jflyper