2025.12.1

Compared to v4.5.2, v2025.12.1 brings back crash flip support for brushed motors, restores VTX functionality, and integrates major feature updates from SPI ELRS v4.0.

Target include:

• HUMMINGBIRD_RS_V2
• LionBee_ELRS_V3
• LionBee_ELRS_V4
• HUMMINGBIRD_F4_V4_ELRS_V3
• HUMMINGBIRD_F4_V4_ELRS_V4
• HUMMINGBIRD_RS_ELRS_V3(RSV3.1)
• HUMMINGBIRD_RS_ELRS_V4(RSV3.1)
• BEEBRAIN_BRUSHED_V2_ELRS_V3
• BEEBRAIN_BRUSHED_V2_ELRS_V4
  AND MORE:

Features

• Restored the AT32F435 CPU frequency to 288 MHz.
• Enabled 120 MHz overclocking by default for STM32F411.
• Added support for SPI ELRS versions 3.x.x / 4.0.0.
• Brushed mode now supports Turtle Mode by default.

Bug fixes

• Fixed an issue that could cause disconnection when changing parameters in the OSD menu on SPI V4.0.0.
• Fixed a potential gyro issue caused by an overly high SPI frequency when the F411 is running at 120 MHz.

Note

• Important notice for LionBee users: if the voltage reading is abnormal or inaccurate, please manually adjust the voltage scale.
• HUMMINGBIRD_RS_ELRS_V3 is HUMMINGBIRD_RSV3.1.

v4.5.1

Compared with v4.5.0-alpha, the official version of v4.5.1 adds a larger unlocking angle by default, provides a higher CPU frequency for some MCUs, and fixes bugs and errors in some models......

HUMMINGBIRD_RS_V2：Fixed the RSV2 voltage inaccuracy.
HUMMINGBIRD_F4_V4：Fixed a possible stall issue with the motor at low speeds.

Target include:

• AcroBee 65
• AcroBee 75
• SAVAGEBEE_PUSHER
• STINGERBEE
• HUMMINGBIRD_F4_V3
• HUMMINGBIRD_F4_V4
• HUMMINGBIRD_RS_V2
• Beebrain Brushed V2.5 AIO
  AND MORE:

v4.5.0-KAACK

This is a test version of the NBD Betaflight KAACK-4.5.x branch. It has not been fully verified for the target board and is intended for testing purposes only. We assume no responsibility for any irreversible consequences that may result from flashing, such as flight controller burnouts, irreversible failures of the gyroscope, or ignition of the ESC. It is strongly recommended that you flash this firmware version only after fully understanding the risks mentioned above and thoroughly reviewing the source code.

Target include:

• Hummingbird RS

AND MORE:

• BeeBrain HD G4
• Cricket F7
• Cricket F7V2
• Infinity AIO
• Infinity F4
• Infinity 200RS
• Infinity AIOV2
• Infinity AIOV2PRO
• BeeBrain BL G4 HD
• Galaxy AIO255

v4.5.0-alpha.2

This is a test version of the NBD Betaflight 4.5.x branch. It has not been fully verified for the target board and is intended for testing purposes only. We assume no responsibility for any irreversible consequences that may result from flashing, such as flight controller burnouts, irreversible failures of the gyroscope, or ignition of the ESC. It is strongly recommended that you flash this firmware version only after fully understanding the risks mentioned above and thoroughly reviewing the source code.

Target include:

• AcroBee 65 (Tested, Official Release)
• AcroBee 75 (Tested, Official Release)
• BeeBrain BLV4 ELRS F4
• BeeBrain BLV4 Ghost F4
• BeeBrain BLV4 HD ELRS F7
• BeeBrain BLV4 TBS F4
• Galaxy AIO F4
• Hummingbird F4V3
• Infinity AIO255
• SavageBee Pusher

AND MORE:

• Infinity F4
• Infinity 200RS
• Infinity AIOV2PRO
• Infinity AIOV2
• Cricket F7V2
• Cricket F7
• Infinity AIO
• BeeBrain HD G4
• Galaxy AIO255

Features

• Added target SavageBee Pusher.
• Added brushed motor flip over after crash support for AT32.
• Use HSE OSC for STM32G4 branch and 192MHz overclock CPU frequency as default setting.
• Added GPS support for target BeeBrain BLV5 HD ELRS G4.

Bug fixes

• Fixed default battery current and voltage scaling is not effective.

v4.5.0-alpha

This is a test version of the nbd_betaflight 4.5.x branch. It has not been fully verified for the target board and is intended for testing purposes only.
We assume no responsibility for any irreversible consequences that may result from flashing, such as flight controller burnout, irreversible failure of the gyroscope, or ignition of the ESC. It is strongly recommended that you flash this firmware version only after fully understanding the risks mentioned above and thoroughly reviewing the source code.

Target include:

• AcroBee 65 (Tested, Official Release)
• AcroBee 75 (Tested, Official Release)
• BeeBrain BLV4 ELRS F4
• BeeBrain BLV4 Ghost F4
• BeeBrain BLV4 HD ELRS F7
• BeeBrain BLV4 TBS F4
• BeeBrain BLV5 HD ELRS G4
• Galaxy AIO F4
• Hummingbird F4V3
• Infinity AIO255

And also include configs firmware, The naming convention has minor differences from the standard firmware, primarily in the format: ...[*MCU] + [_NBD_] + [Flight Controller Model], Apart from this, there are no differences from the standard firmware.

• BeeBrain HD G4
• Cricket F7
• Cricket F7V2
• Galaxy AIO255
• Infinity 200RS
• Infinity AIO
• Infinity AIOV2
• Infinity AIOV2PRO
• Infinity F4

Some models not listed may have been discontinued from maintenance, inadvertently omitted, or incorrectly named. If you encounter such issues, please provide feedback on the Issues page, and we will do our best to assist and resolve your queries.

v4.4.2

Add target

• Added StingerBee 3inch

v4.4.0

This is a release candidate for 4.4.0 targets. Targets including:

Beebrain Brushless V1
Beebrain Brushless V2
Beebrain Brushless V3
Beebrain Brushless V4 ELRS_65
Beebrain Brushless V4 GHOST_65
Beebrain Brushless V4 CRSF_65
Hummingbird F4 Pro
Hummingbird F4 V2 ELRS3.0
ELRS_NBD_2400_RX_2.x
ELRS_NBD_2400_RX_3.0
BEEBRAIN_BL_V4_F7_HD_ELRS_75

4.3.2-V1.0.0

BASE hex files including everything except PID tuning.
NOBEESIGN hex file have Uart1 TX pin free (beesign is not used for vtx control of Newbeedrone Mark3 camera)

Add target

• Added Beebrain BL V4 ELRS

Add PID tune

• Added Beebrain BL V4 ELRS 65 pid for Beebrain BL V4 ELRS (betaflight_4.3.2_BEEBRAIN_BL_V4_ELRS_65_f7374a7.hex)

4.3.2-RC1

4.3.2 - Release Candidate

This is a release candidate for 4.3.2 targets. Targets including:

• Beebrain Brushless V1
• Beebrain Brushless V2
• Beebrain Brushless V3
• Beebrain Lite
• Beebrain Pro
• Beebrian Pro DSM
• CRICKET V2 F7
• GALAXY AIO 255
• HIVE16
• HIVE16 DSM
• Hummingbird F4 Pro
• Hummingbird F4 V2
• Hummingbird F4 V2 ELRS3
• INFINITY200
• INFINITY305
• INFINITY AIO V2 Pro

BASE hex files including everything except PID tuning.
NOBEESIGN hex file have Uart1 TX pin free (beesign is not used for vtx control of Newbeedrone Mark2 camera)

4.3.1-V1.0.2

BASE hex files including everything except PID tuning.

Add new feature for Hummingbird V2 F4

• Added SPI ELRS 3.0 support for Hummingbird V2 F4 (ELRS3 Version fa93983b6 for test)

Others

• Set Hummingbird V2 F4 useDshotTelemetry to false
• Added beeper function for Hummingbird V2 F4