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Crazyflie Bolt

Crazyflie Bolt

SKU: 114991537
This product is in early access stage. It means that while the hardware is working and tested, the software is still pretty much work in progress. For more information see the early access description page.

The Crazyflie Bolt is a Crazyflie 2.X compatible flight controller for brushless builds. It is intended to have the strengths of the Crazyflie 2.1, but in a slightly bit bigger package. It uses the same sensors as the Crazyflie 2.1 and the firmware binaries are compatible with both.


  • Firmware compatible with Crazyflie 2.1 and Crazyflie Bolt
  • Supports expansion boards with automatic detection
  • Integrated radio with dual antenna support (no firmware support yet)
  • Wireless firmware updates
  • Dual-MCU architecture with dedicated radio/power management SoC for advanced applications
  • Real-time logging, graphing and variable setting in addition to full use of expansion boards when using a Crazyradio or Crazyradio PA and a computer
  • Integrated power distribution (max 8A / motor)
  • Low latency IMU connection
  • Low power mode (down to 50uA) in sleep

Mechanical specifications

  • PCBA size (WxHxD): 35x9x42mm (including connectors but not battery wire)
  • Weight: 7.3 g (PCBA only), 9.2 g (PCB + battery cable)
  • Battery cable length: 50 mm
  • ESC cable length: 60 mm
  • Antenna length: 150 mm
  • Standard mounting (M3 mounting holes spaced 30.5 mm in square)

Electrical specifications

  • Voltage input 1S-4S (3V to 17V)
  • Deep sleep consumption down to 50 uA

Radio specifications

  • 2.4GHz ISM band radio
  • 20 dBm radio amplifier
  • Bluetooth Low Energy support with iOS and Android clients available (tested on iOS 7.1+ and Android 4.4+)
  • Dual antenna support (2 x uFL connector)


  • STM32F405 main application MCU (Cortex-M4, 168MHz, 192kb SRAM, 1Mb flash)
  • nRF51822 radio and power management MCU (Cortex-M0, 32Mhz, 16kb SRAM, 128kb flash)
  • uUSB connector
  • Full speed USB device interface
  • Partial USB OTG capability (USB OTG present but no 5V output)


  • 3 axis gyro (BMI088 connected via SPI)
  • 3 axis accelerometer (BMI088 connected via SPI)
  • high precision pressure sensor (BMP388)

Supported clients/controllers

  • Win/Linux/OSX python client
    • The gamepads used by the Xbox 360 and the Playstation 3 are used as reference controllers
    • Any gamepad/controller with at least 4 analog axes
  • Android mobile device
  • iOS mobile device


  • 1 x Full speed uUSB
  • 2 x Crazyflie expansion connectors (see blow)
  • 2 x u.FL connectors
  • 4 x ESC connectors using PWM / OneShot125 (JST-PH)
  • 1 x XT30 battery connector

Expansion connectors

  • VCC (3.0V, max 100mA)
  • GND
  • VCOM (5V, max 400mA)
  • VUSB (both for input and output)
  • I2C (400kHz)
  • SPI
  • 2 x UART
  • 4 x GPIO/CS for SPI
  • 1-wire bus for expansion identification
  • 2 x GPIO connected to nRF51

    Package contents

    • 1 x Crazyflie Bolt (with battery cable attached)
    • 1 x External antenna (with u.FL connector)
    • 4 x ESC connector cables
    • 2 x Short male deck connectors (spare part)
    • 2 x Long male deck connectors (spare part)


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