When most people think of gardening, soil comes to mind. But plants don’t actually require it to survive. They mostly need the nutrients and minerals in the soil. Plants can grow in water, gravel, perlite,… More
The hydroMazing smart garden system is designed to monitor and manage your growing environment by automatically controlling fans, heaters, lights, water pumps, and now, the nutrient solution.
The nutrient solution level of the hydroponics container system must be monitored.
As the nutrient solution level decreases it needs to be replenished with fresh water, otherwise the nutrient solution becomes more concentrated and some plants won’t respond well. The hydroMazing Nutrient Controller can activate a pump that adds fresh water to bring the concentration back to the level it was when started, often referred to as “topping-off.” The hydroMazing Nutrient Controller will also monitor your pH and EC, activating pumps to manage the solution, and notifying you when you need to make changes.
There is no need to adjust your pH or EC until it is necessary.
This is a big one! There is a lot of misinformation out there about keeping the pH and EC regulated. If I were paranoid, I’d say it was a conspiracy from hydroponics manufacturers and retailers who want to sell more consumable product. Don’t get me wrong, proper pH and EC is important, even critical, to the success of a plant.
The pH of water is an important measurement whether you are gardening indoors or outdoors, soil or soil-less, because it affects whether a plant can properly take in nutrients. Even though hydroMazing monitors your pH and EC, I still recommend a handheld pH tester such as the Oakton EcoTestr pH 2 Waterproof pH Tester, which is excellent for the home gardener and has been proven time and again to be accurate.
The electrical conductivity (EC) of water estimates the total amount of solids dissolved in water, or TDS (Total Dissolved Solids). TDS is often measured in ppm (parts per million). In hydroponics, this measurement is used to determine the approximate concentration of nutrient solution to water. There are many hand-held EC devices available as well.
When do I need to adjust the pH?
Only under the following conditions:
pH is at or below 5.0 or above 6.5
AFTER at least 30 minutes from the time of topping-off or changing the nutrient solution.
How to adjust? I highly recommend using pH Up and pH Down from General Hydroponics sparingly and only when necessary.
Flushing means to literally flush empty the nutrient solution from the hydroponics system and replace it with fresh “good” tap-water. Then return the nutrient solution back to what it should be for the phase of growth.
When in doubt, flush the system and refresh the nutrients. Otherwise, it’s recommended to flush your recirculating system every 7 – 14 days. When I grow, I try to keep the nutrient solution working as long as possible, however, salts build-up over time and it is good to flush with fresh water from time to time.
The hydroMazing controller is designed to operate ventilation fans for air circulation, water pumps, occasionally a humidifier, heaters, or any other appliance that is necessary to maintain an ideal environment for plants to grow. Typically, we DIY’ers would hook-up some relays to a microcontroller to achieve control. However, with hydroMazing, the system uses remote controlled wireless AC outlets, ensuring safer control than traditional relays. hydroMazing uses low-cost open-hardware modules and the ubiquitous microcontroller, the Atmega328, on an Arduino Nano*, offering the flexibility of customization and expansion. The sensor choices are endless, but I’ve narrowed it down to a few important and relatively inexpensive modules. A temperature and relative-humidity sensor, moisture sensors for soil, liquid temperature probe for hydroponics, a simple photocell. There are many other optional additions including the float switch or switches and flow-rate sensors.
The wirelessly controlled outlets proved to be a reliable method of controlling the fans using the Arduino to send the signals depending on the temperature sensor’s readings. It didn’t take long for the source-code to evolve into a beast. The Arduino family of microcontrollers is limited in how many instructions it can run and hitting the program size limit doesn’t take very long when you want to control more than a few blinking LEDs. I have found that the size limitation has forced me to write better, more efficient code than I initially do. Even with creative variable handling and custom libraries, eventually, there is a need for another microcontroller or to move to a larger one.
Wireless Monitoring w/o Internet
There are several ways that the microcontrollers can communicate with each other. The least expensive wireless method I could find is the nRF24L01 wireless radio transceiver. The module is a low-power, lightweight variety of bluetooth giving hydroMazing the ability to communicate with a monitoring unit.
I decided to add another Arduino Uno with an Liquid Crystal Display shield so that I could display what the sensors were reading, the state of appliances, and alerts with notifications.
I made my own open and adaptable platform that can be custom tailored to a wide variety of gardening needs and conditions; yet, also a self-contained wireless system. The open-architecture of the system allows for ease of integrating Internet connectivity and web services.
Enter the Raspberry Pi connected with an nRF24L01 module.
I was able to modify much of my Arduino Source code to listen for incoming transmissions and then write that data out to a few files. First, a log file that captures all communications between the Pi and the hydroMazing Monitor. Next, I have the program write out the current state of all sensor objects and a file for all of the appliance objects. When an alert occurs the program will create a file containing that alert.
I then added a PHP script to read in the data object’s from their respective files and display live on the Pi’s Apache server.
Next, I wrote a Python script to read the directory for the alerts file and if it exists, read the file, parse out the pertinent information and then email or through SMS text the user. In addition to sending an email or text alert, the python script moves the alert file into position for the PHP script to read and display.
Using the log files that are created, I am able to import the data into a database. Once the hydroMazing’s data is recorded into a database residing on the Raspberry Pi we can start performing analytics and generate some reports.
Monitoring and controlling the system is mostly done for us, but when the hydroMazing needs to alert us to a problem it can now by using the Raspberry Pi.
With the hydroMazing smart gardening system, you can grow healthy, happy plants anywhere!
Contact us today for more information!
What do you think when you hear the term “hydroponics”?
Do you imagine technicians in white lab coats tending sterile trays on a space station?
Or maybe you think of a group of stoner’s growing weed?
Two of the biggest reasons that hydroponics has such a bad reputation, is that purists swear it is unnatural to garden in a medium other than soil, and hydroponics stores are often motivated by selling you the most expensive equipment and consumables.
The truth about hydroponics, as with most things in life, is somewhere in the middle. If you are ultimately interested in gardening using aquaponics, consider hydroponics the gateway to aquaponics.
The earliest examples of hydroponics date back to the Hanging Gardens of Babylon and the Floating Gardens of China. Humans used these techniques thousands of years ago. Although the general theory behind hydroponics remains the same, modern technology has enabled us to grow plants faster, stronger, and healthier.
The best way to find out, is to try it for yourself.
I enjoy helping people, like myself, who prefer to garden outside but want to be able to extend or even grow all year long. Think of indoor gardening in the same way that you think of brewing beer at home. Indoor gardening is a hobby for most people do not have access to large indoor spaces, so it is unlikely that they would be able to grow enough plants to make a profit. The greatest benefit to growing your own consumables is that you will appreciate the amazing results even more because you’ll know how the plants were treated.
Where Do I Start?