Roadrunner

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

Sensors

• 3 axis accelerometer / gyroscope (BMI088)
• high precision pressure sensor (BMP388)

Microcontrollers

• 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 tested to > 1 km range LOS with Crazyradio PA
  • 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

Compatibility

• 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)