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SKU: 800000001

This product is discontinued.

The Roadrunner is a Loco positioning compatible tag that combines the hardware of a Crazyflie with the UWB positioning of the Loco products in a handy package. It's ready for mounting on 3rd party robots and supports power supplies up to 12V. It can communicate through cable connection or via radio.

For more information on the Loco Positioning System please see this Loco Positioning System page.

Specifications are based on the standard 2-way ranging mode.


  • Supports Tag mode
  • Based on the Crazyflie hardware and uses same code-base as the Crazyflie
  • 3-axis accelerometer / gyroscope
  • Low latency 2.4 GHz radio that supports Bluetooth LE
  • 5 - 12V power supply or micro-USB
  • Data communication via USB, UART, low latency 2.4 GHz radio or Bluetooth LE
  • Wireless firmware updates
  • Supports Crazyflie expansion decks
  • Supports Crazyflie libraries and clients

Electrical specification

  • Micro-USB connection for powering and full speed data communication
  • 4 position locking connector with
    • 5 - 12V power supply
    • UART RX/TX for serial communication
  • Power Consumption 240 mA (5V)


    • 3 axis accelerometer / gyroscope (BMI088)


    • STM32F405 main application MCU (Cortex-M4, 168MHz, 192kb SRAM, 1Mb flash)
    • nRF51822 radio and power management MCU (Cortex-M0, 32Mhz, 16kb SRAM, 128kb flash)
    • Full speed USB device interface
    • Partial USB OTG capability (USB OTG present but no 5V output)
    • 8KB EEPROM

    Ranging specification

    • Based on the Decawave DWM1000 module
    • Implements IEEE 802.15.4 UWB
    • Ranging accuracy ±10 cm according to DWM1000 spec. See the wiki for measurements.
    • Maximum tested system range 10 m. The Decawave DWM1000 module is specified to 300 m.
    • Nr of anchors required: theoretical minimum of 4 for 3D positioning. More anchors add redundancy and accuracy.

    Radio specification

    • UltraWide band radio
      • Operates at 3.2 - 7 GHz
      • Channel bandwidth 500 MHz
    • 2.4 GHz radio
      • 20 dBm radio amplifier
      • Bluetooth Low Energy support with iOS and Android clients available (tested on iOS 7.1+ and Android 4.4+)
      • External antenna using U.FL connector

    Expansion connectors

    • VCC (3.0V, max 100mA)
    • GND
    • VCOM (unregulated VBAT or VUSB, max 1A)
    • 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

    Mechanical specification

    • Roadrunner PCBA
      • Weight: 9.6 g
      • Size (WxHxD): 35x11x77 mm
    • Roadrunner PCBA with enclosure
      • Weight: 28.7 g
      • Size (WxHxD): 40x15x80 mm


    • Works with the Loco Positioning System

    Package contents

    • 1 x Roadrunner PCBA
    • 1 x Enclosure box and 2 x screws
    • 2 x PCBA mounting screws
    • 1 x U.FL antenna with adhesive for mounting inside the enclosure (link)
    • 1 x 4 position male connector with screw terminals (pdf)

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