Resilience IOT

Environmental Resilience: IOT Sensing and Decision Support


The Virridy satellite-connected gateway collects environmental sensor data and transmits to our online analytics platform.

Environmental Resilience

Climate change is exacerbating and accelerating environmental damage and economic stress globally. The World Health Organization projects more than 250,000 additional deaths each year between 2030 and 2050 because of increases in heat waves, diarrhea, malaria, and crop failure. Nearly 100 million people could be pushed back into poverty by 2030 because of climate change. The current 20-year megadrought throughout the Western United States is the worst in more than 500 years. It is intensifying social and economic stressors.

Today, 2 billion people live with chronic high-water stress, and 4 billion experience water stress at least one month a year. One-third of agricultural soils globally are degraded, and 2 billion people face food insecurity. The United States remains the world’s largest emitter of carbon per capita, while global energy use continues to grow. Virridy enables action toward global environmental resilience.

How it Works

Virridy’s Resilience IOT technologies support proactive environmental resource management with and among communities globally. We develop decision support information to enable early interventions and proactive management in the agricultural, water, and energy sectors. Our technology leverages a range of in-situ and geospatial data sources to provide data analytics for integrated environmental resources management.

Virridy combines a variety of accessory sensors with satellite connectivity. We can monitor water use, conservation and quality, air quality, agricultural productivity, electricity consumption, and other parameters, to improve environmental conservation, energy efficiency, and climate resilience. Accessory sensors include low and self-powered EnOcean transmitters, including custom designs and off-the-shelf products from other vendors.

Sensor data is transmitted to a cloud-based machine learning analysis platform for local and regional scale decision support.

Sensing Innovation - In-Situ Remotely Reporting Tryptophan-Like Fluorescence Sensors for Fecal Exposure Detection in Drinking Water

Virridy has developed a novel device for the measurement of tryptophan-like fluorescence (TLF). We make use of recent advances in deep-ultraviolet light emitting diodes (UV-LEDs) and sensitive semiconductor photodiodes and photomultipliers. TLF is an emerging indicator of water quality that is associated with members of the coliform group of bacteria and therefore potential fecal contamination. Our technology is capable of detecting TLF levels corresponding to “high risk” fecal contamination levels (> 10 CFU/100 mL) in-situ, with remote reporting to alert water system operators.

Low-cost, field-deployable, near-time methods for assessing water quality are not often available where waterborne infection risks are greatest.


  • Low Power Texas Instruments MSP432P401R ARM Cortex M4
    • 48MHz
    • 256KB Flash
    • 64KB RAM


  • TI-RTOS / Simplelink based firmware
  • Field upgradeable
  • Remotely configurable sampling and transmitting rates
  • Supports new wireless sensors without reconfiguration


  • Uplink via Swarm satellite network
    • 66 Low Earth Orbit 1/4U Satellites
    • 137-138 MHz (downlink) 148-150 MHz (uplink)
    • 150KB/mo. data plan
  • Local wireless via Enocean
    • 900MHz ISM band
    • Supports up to 25 Ultra-low power energy harvesting devices
    • 30m range


  • SDI-12 multiple sensor input port
  • Serial debug and programming port


  • 64Mb flash sensor data storage
  • Temperature and humidity logging
  • OLED diagnostic and setup interface
  • Battery state of charge monitoring


  • 10.2Ah Protected Lithium Ion rechargeable energy storage
    • Powers device in active mode for one month before recharging
  • 6 Watt rugged solar panel for fast charging


  • IP67 Waterproof rugged enclosure
  • Stainless steel mounting bracket
    • Compatible with industry standard Band-It mounting hardware
    • Versatile bolt hole pattern for mounting in a wide variety of orientations

Waterwheel Database and API

WaterWheel is modern Python backend built using Django, the same framework that powers Instagram, Spotify, YouTube, Dropbox, and Pinterest.

  • Django web app
  • Postgres database
  • Django REST API
  • Containerized using Docker
  • Deployed using AWS Elastic Beanstalk
  • Can scale to 1M+ gateways

Waterwheel is currently storing and analyzing over 500,000 waterpump-days of data. 


Driving Improvements in Global Heath

Our IoT and connected sensors are driving improvements to human well-being in healthcare, water, agriculture, natural resource management, resiliency to climate change and energy.

This is according to the United Nations and CISCO Systems in a recently published report, "Harnessing the Internet of Things for Global Development."

Since 2010, Virridy has conducted numerous studies with our own IOT platform. Our results have influenced the design of these public health interventions and provided data to enable performance based incentives.

In a recent study in East Africa supported by NASA and USAID, data from our satellite connected groundwater pump sensors was combined with remote sensing and machine learning to improve drought resilience.