Download Betaflight 3.4.1

Flight controller software is used to control drones or airplanes. Open source examples include MultiWii, Baseflight, Cleanflight and Betaflight† The latter includes support for dshot, multishot, and oneshot engine protocols, STM32, F7, F4, F3, and F1 processors, telemetry protocols, and OLED displays. Betaflight 3.4.1 has been released with the following announcement and list of changes:

Maintenance Release

Please read the Betaflight 3.4 Release Notes. This release contains bug fixes and target changes only. For a full list of new features see 3.4.0. We have tried to make this release as bug free as possible. If you still find a bug, please report it back to us by opening an issue here. We now also have a Facebook Group. If you want to talk about Betaflight, ask configuration questions, or just hang out with fellow pilots, you can do this by joining our Facebook Group.

Important information when upgrading from an earlier version of 3.4
unfortunately, bugfixes in the flight controller core functionality have led to an increase of the firmware size, causing it to overflow the available space on a number of F3 based flight controllers. As a result, some features have had to be removed from a number of F3 based flight controllers in order to make the firmware fit into flash. The following targets are affected: CRAZYBEEF3FR, CRAZYBEEF3FS, FRSKYF3, FURYF3, FURYF3OSD, OMNIBUS, SPRACINGF3, SPRACINGF3EVO, SPRACINGF3MINI, SPRACINGF3NEO (#6444, #6449, #6497);

Fixes:

• Fixed the reliability of telemetry on FPort with newer RX firmware (#6098);
• Fixed the display of warnings when the ESC sensor is enabled (#6339);
• Fixed task statistics in CLI (#6344);
• Fixed display corruption in OSD (#6359);
• Enabled support for the ICM20601 gyro and fixed the output scaling in its driver (#6377, #6475);
• Fixed problem with unreliable SmartPort telemetry (#6382);
• Fix early disarming with GPS rescue when sanity checks are enabled (#6392);
• Fixed compilation error for custom built targets (#6419);
• Fixed A-Tail mixer (#6423, #6465);
• Fixed bug in OSD initialization causing various crashes (#6439);
• Fixed incorrect disabling of telemetry when Jeti XBUS or Spektrum SRXL are disabled (#6442);
• Fixed incorrect voltage and current sensor filter frequencies (#6452, #6466);
• Fixed the loop time calculation when 32 kHz gyro ouput is used (#6481);
• Disabled DYNAMIC_FILTER feature if the gyro loop frequency is less than 2 kHz (#6484).

Target Updates:

• Added new target IRCSYNERGYF3 (#6342);
• Added support for DShot beacon on AG3X (#6394);
• Fixed motor 3 and 4 Dshot output on KAKUTEF7 (#6436);
• Removed features from F3 to make the firmware fit into flash (#6444, #6449, #6497);
• Fixed I2C support on YUPIF7 (#6446);
• Renamed the SKYF405 target to SKYZONEF405 (#6458);
• Fixed the LED pins for KISSFCV2F7 (#6459);
• Fixed the feature list for OMNIBUSF4 variants (#6486);
• Added new target DALRCF722DUAL (#6489).