IoT Grow Monitor
Fall is almost here. With temperatures falling, the basil and heirloom tomatoes that you have been growing in your garden to top your dinner with are moving back inside the house for winter. But will they still grow?
Remote Monitoring
This project is a low-cost, easy to build internet-of-things (IoT) device that can help you to remotely monitor your indoor crops or exotic plants. Using Adafruit IO, you can remotely see your sensor data in real time on a mobile device giving you a visual user interface.
DIY 3D Printed Device
The device is designed to be suspended in mid-air, so the no-contact thermometer is pointing towards the leaves or flowers of your plant.
The 3D printed case houses a couple of sensors to calculate your plant's photosynthetic photon flux density (PPFD) and vapor pressure deficit (VPD).
Knowing these data points can help optimize the yield of your indoor crops.
WipperSnapper & Blockly Actions
With Adafruit IO’s new Blockly Actions, you can drag and drop “blocks” to create advanced triggers.
In this project you'll use “Math Blocks” to calculate the PPFD and VPD using advanced formulas and temperature sensor data.
With Wippersnapper, you can easily setup your QT Py ESP32 device with I2C sensors all within the browser with no need for coding. The Adafruit IO site is intuitive and will walk you through the process.
Hardware
The following hardware fasteners are required to assemble this project.
- 4x M3 x 16mm long machine screws
- 8x M3 x 6mm long machine screws
- 6x M2.5 x 6mm long machine screws
- 2x M3 hex nuts
Page last edited October 08, 2025
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