Digital ESC firmware for controlling brushless motors in multirotors.

Based on BLHeli_S revision 16.7

Bluejay aims to be an open source successor to BLHeli_S adding several improvements to ESCs with Busy Bee MCUs.

• Digital signal protocol: DShot 300 and 600
• Bidirectional DShot: RPM telemetry and extended DSHOT telemetry
• Selectable PWM frequency: 24, 48 and 96 kHz
• PWM dithering: 11-bit effective throttle resolution
• Power configuration: Startup power and RPM protection
• High performance: Low commutation interference
• Smoother throttle to PWM conversion
• User configurable startup tunes 🎵
• Numerous optimizations and bug fixes

See the project changelog for a list of changes.

• SiLabs EFM8 BB21
• SiLabs EFM8 BB51

The SiLabs EFM8 BB10 has been deprecated. The last official release is 0.18.1. The BB10 has it's limitations in comparison to the BB21 and BB51. Not many of those seem to be around anymore and the team does not have a single one for testing, thus decided to drop support.

You will still be able to manually build for it, but we can not guarantee compatibility and do not want to suffer from it's limitations during further development.

Bluejay firmware can be flashed to BLHeli_S compatible ESCs and configured using the following configurator tools:

• ESC Configurator (PWA)
• Bluejay Configurator (Standalone)

You can also do it manually by downloading the release binaries.

See the wiki for useful information. A very detailed documentation with flow charts is available too.

This is a fork of the original Bluejay project. The team has decided to detach this fork from the orignal project in order to have all github features to their disposal.

The decision to keep the name was made in order to honour the orignal project and the hope that the original developer will join us here, once he decides to make a comeback.

Any help you can provide is greatly appreciated!

If you have problems, suggestions or other feedback you can open an issue.

You can also join our Discord server to ask questions and to discuss Bluejay!

If you have fixed an issue or added a functionality, please feel free to submit a pull request. Direct your PRs against the develop branch of this repository.

Please see the wiki for instructions on how to build Bluejay from source.