Hydroponics Sensor

ESP32 based Hydroponics Sensor (Water Flow, Water PPM, Water pH, Water Temperature).

Cedric

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Description

WeMos LOLIN 32 board hooked up to:

DS18b20 Water Temperature Sensor,
Gravity Analog pH Sensor (https://www.dfrobot.com/product-1110.html)
Gravity Analog EC Meter (https://www.dfrobot.com/product-1123.html)
Water Flow Sensor

I used a modified EC probe based from the Three Dollar EC - PPM Meter by Michael (https://hackaday.io/project/7008-fly-wars-a-hackers-solution-to-world-hunger/log/24646-three-dollar-ec-ppm-meter-arduino)

Details

This was a freelance job offered to me, unfortunately, I can't share the finished code.
This project was supposed to be a test of concept if automating the sensors in a hydroponics farm will work while still maintaining the accuracy of the readings over-time.
The data gathered was also published to the a cloud server for viewing even if the farm was located at a remote area.

Components

1 × WeMos LOLIN32 https://wiki.wemos.cc/products:lolin32:lolin32
1 × Gravity Analog PH Module https://www.dfrobot.com/product-1110.html
1 × Gravity: Analog Electrical Conductivity Sensor https://www.dfrobot.com/product-1123.html
1 × DS18b20 Water Temperature Sensor https://www.sparkfun.com/products/11050
1 × Water Flow Sensor https://www.dfrobot.com/product-1531.html

Build Instructions

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1

Some notes

The ESP-32 board pins operate in 3.3v levels while the Gravity pH and EC sensors operate in 5V. I inserted a simple voltage divider to shift 5v to 3.3v levels on the signal pins.

View all instructions