We’re happy to announce that release 2025.09 is now available. This update includes Python 3.13 support and improved battery voltage compensation, along with enhanced trajectory control capabilities. The release also features substantial stability and architectural work that lays the groundwork for upcoming features and products. Thanks to our community contributors for their valuable additions to this release.
Major changes
Python 3.13 support
Added support for Python 3.13, with preparations already in place to ensure faster compatibility when Python 3.14 releases.
Improved battery voltage compensation
Enhanced voltage compensation for Crazyflie 2.1, 2.1+, and 2.1 with thrust upgrade kit provides more consistent flight performance across battery discharge cycles. Crazyflie Brushless battery voltage compensation coming soon. Thanks to @Rather1337 for this contribution.
Manual flight setpoint packet
New generic commander packet type for manual flight that allows dynamic switching between Angle and Rate modes for roll and pitch without re-flashing the firmware.
Fully relative trajectories
Trajectories can now be initiated relative to the drone’s current yaw, not just position. This enables fully relative trajectory execution where subsequent trajectories maintain the drone’s current orientation. Thanks to @johnnwallace for this contribution.
Modular deck discovery architecture
Replaced OneWire-only deck discovery with a modular backend system that supports multiple discovery protocols. This enables future deck communication methods while maintaining full backward compatibility with existing decks.
Release overview
crazyflie-firmware release 2025.09 GitHub
cfclient (crazyflie-clients-python) release 2025.9 GitHub, PyPi