eGreenhouse

Project Name | Updates | Github

Project Leads: Ariel Stroh, Eli Winkelman, and Zack Pelster

Overview

eGreenhouse is a lightweight and low-cost greenhouse sensor package integrated with the OPEnS HyperRail. The sensor package travels through the greenhouse and transmits a live stream of spatial environmental data to the internet.

Description

Advances in gas sensors and open-source hardware (e.g., Arduino) are enabling new options for low-cost and light-weight gas sampling devices that are also robust and easy to use and duplicate. In this project, we are developing a complete system for high-accuracy measurements of temperature, relative humidity, luminosity, CO2, and dust/pollen concentrations. The system is assembled from off-the-shelf products, with a total cost of less than $300. The system is deployed on the OPEnS Lab HyperRail, a modular rail conveyance system. Validation of the sensor package is conducted in a greenhouse.

Objectives

• Collect and analyze spatial data in greenhouses to provide useful metrics to growers.

• Lower the cost of expensive sensors by condensing multiple sensor locations into one moving one.

Outcomes

The figure above shows time series results from a five-day deployment in an OSU greenhouse. Temperature, RH, and Luminosity trends match expectations following the diurnal cycle. This graph highlights the temperature dependence of the O2 sensor, a problem which requires further investigation. Diurnal oscillations in CO2 due to photosynthesis are below the tolerance of this sensor (± 30 ppm ± 3 % of measured values) and therefore cannot be detected in this model. Deployment in a greenhouse with higher plant density, such as commercial vegetable production, will likely render more relevant CO2 results.

Future

The eGreenhouse is being deployed with the new 2 and 3-dimensional HyperRail. This will allow the collection of multi dimensional spatial data and coverage of a larger greenhouse area with one sensor package. This along with the addition of new sensors to measure ndvi and soil moisture will allow for fine-grained health metrics for individual plants. Finally, integration with Spool and Loom will simplify the code base and allow online data visualization and remote device logging and settings management.

Resource List

• See the eGreenhouse GitHub for technical information.

Tutorials

Keywords

CO2 sensor, O2 sensor, greenhouse monitoring

References