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We source the off-the-shelf components that fit your Motus needs, then assemble and test your SensorGnome to ensure compatibility with the Motus network.


All SensorGnomes share some components and features:


  • Built on Raspberry Pi 3B, with heat sink on the Broadcom processor
  • FUNcube Pro+ receivers (for 166 MHz tag detection)
  • Stable SensorGnome software release (currently using October 12, 2018 image with the following updates: April and October, 2019; February 2021
  • "Dual-mode" 166 MHz (Lotek) and 434 MHz (CTT) capable; detection of CTT tags requires separate purchase of CTT's Motus adapter
  • Bulkhead double-shielded (LM195) coaxial connections to reduce strain on receivers and USB cables (1 per FUNcube included; specify UHF/BNC/N after purchase)
  • Precise timekeeping via GPS sync (external GPS antenna included)
  • Integrated exterior WiFi switch---a double-click activates a temporary WiFi hotspot to allow data download without a physical connection or removal of the microSD card. A second double-click deactivates the WiFi hotspot
  • Safe shutdown via integrated exterior switch (hold 3 seconds)
  • 32GB class 10 microSD card
  • 120V AC power supply
  • Reduced rate FedEx Ground shipping to continental US customers (contact us for Alaska/Hawaii/Canada/International or expedited rates)


Optional components

  • 5V/3A DC converter for solar or other DC applications ($100)
  • additional bulkhead coaxial connections for additional receivers such as the CTT Motus adapter ($15 each; contact us)


Quality control

We source all new components, assemble your SensorGnome in-house, and subject each unit to at least 48 hours of continuous operation prior to shipping. During this period, we test:

  • connection to the Motus server
  • GPS acquisition
  • each receiver with active nanotag
  • multiple reboot cycles
  • WiFi connection and data download
  • DC power source (if added)

SensorGnome assembly (FUNcube)

  • See Warranty page for details.

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