DIY

Watering and fertilizing automation demo model

Demonstration model automation of irrigation and fertilization In this article, the wizard will introduce us to his option for automating watering plants. The master chose indoor plants as an object for demonstration, but this system can be adapted, for example, for drip irrigation. Simultaneously with watering, the required amount of fertilizers is also supplied to the plants. The whole system works in automatic mode and can also be controlled remotely via a smartphone.
The main goal of the project is to provide an automated irrigation system and the supply of three main macronutrients, nitrogen (N), phosphorus (P) and potassium (K) to the soil. < br> Tools and materials: – ESP8266 board; – DHT22 temperature and humidity sensor;
– Solenoid valve;
– Printed circuit board;
– Resistors; – Soldering station;
– Ruler;
-Marker;
-Drill;
-Board;
-Plastic bottle;
-Pipes;
 Demonstration model automation of irrigation and fertilization Demonstration model automation of irrigation and fertilization < a href = "https://usamodelkina.ru/uploads/posts/2021-05/1621433633_1-8.jpg" rel = "prettyPhoto"> Demonstration model automation of irrigation and fertilization Demonstration model automation of irrigation and fertilization < a href = "https://usamodelkina.ru/uploads/posts/2021-05/1621433547_1-10.jpg" rel = "prettyPhoto"> Demonstration model automation of irrigation and fertilization Demonstration model automation of irrigation and fertilization Step first: smart farming
Smart farming or smart farming system is a term used to describe the implementation of modern information and communication technologies to improve, monitor, automate or improve agricultural operations and processes.
Sensors collect all information, such as soil moisture, fertilizer, weather, and transmit it over a cellular wireless network to a central hub, giving farmers real-time access to information and analysis of their land, crops, livestock, logistics and technology.
Fertigation is a fertilization method in which fertilizer is applied to the irrigation water using a drip system. In this system, the fertilizer solution is distributed evenly during irrigation. The availability of nutrients is very high, therefore the effectiveness is greater. This method uses liquid fertilizers as well as water-soluble fertilizers. This method increases the efficiency of fertilizer use up to 90 percent.
Demonstration model automation of irrigation and fertilization Demonstration model automation of irrigation and fertilization  Demonstration model automation of irrigation and fertilization Step two: sensors
One of the most commonly used sensors for collecting weather data is the DHT22 (or its equivalent DHT11), a digital humidity and temperature sensor. It uses a capacitive humidity sensor and a thermistor to measure the ambient air and provides a digital signal to the data output.
The operating voltage of the sensor is 3.3V to 5V, temperature is -40 ° C to + 80 ° C. It is also important to keep in mind that the period of its reading is on average 2 seconds (the minimum time between reading).
Demonstration model automation of irrigation and fertilization To measure soil moisture, the YL-69 sensor and the LM393 module are used.
The LM393 has 2 outputs, one digital (D0), which can be adjusted with a potentiometer, and one analog (A0). This module can be powered with 3.3V, which is very convenient when working with the NodeMCU.
The sensor connection is as follows:
LM393 NodeMCU
Output A0 – Input A0
VCC – VCC or GPIO D3 *
GND – GND
It is important to emphasize that it is correct to connect the VCC sensor to a digital pin as an output, in which case the LM393 will only receive power when data is being transmitted. This is important not only to save energy, but also to protect the sensors from corrosion.
Demonstration model automation of irrigation and fertilization The master uses a solenoid valve to supply water to the system and dose fertilizer.
Demonstration model automation of irrigation and fertilization Step third: BLYNK
It is really easy to create IoT (Internet of Things) projects with BLYNK. The first thing to do is install the BLINK app on your phone.
Download the BLYNK app for Apple Iphone or Google Android.
Install BLYNK library for Arduino.
Note that the zip file is downloaded (there are 5 files you need to manually install into your Arduino library).
Then open the application on your smartphone and click “Create a new project”.
Give a name to the project (for example, “NEXTPCB”).
Choose the appropriate equipment model: “NodeMCU”. Pay attention to the authorization token. Click OK. A blank screen with dots appears.
Tap the screen to open the Widgets Window. Install the necessary widgets (humidity, temperature, etc.)
Demonstration model automation of irrigation and fertilization < a href = "https://usamodelkina.ru/uploads/posts/2021-05/1621433582_1-18.jpg" rel = "prettyPhoto"> Demonstration model automation of irrigation and fertilization Step four: demo model
The wizard assembles a demo model to test the system's functionality. The base is a cutting board. Holes are drilled in the board, racks are installed.
Demonstration model watering automation and fertilization Demonstration model automation of irrigation and fertilization < a href = "https://usamodelkina.ru/uploads/posts/2021-05/1621433552_1-21.jpg" rel = "prettyPhoto"> Demonstration model automation of irrigation and fertilization Demonstration model automation of irrigation and fertilization Containers are attached to the racks, into which the fertilizer will be poured.
Demonstration model automation of irrigation and fertilization < a href = "https://usamodelkina.ru/uploads/posts/2021-05/1621433564_1-24.jpg" rel = "prettyPhoto"> Demonstration model automation of irrigation and fertilization Demonstration model automation of irrigation and fertilization С By means of a pipe system, the fertilizer containers are connected to the main tank. The containers are closed with a solenoid valve. At the scheduled time, the valves open and fertilizers enter the tank.
Demonstration model automation of irrigation and fertilization Step fifth: board
For the system, the master designed and assembled a board.
Demonstration model automation of irrigation and fertilization < a href = "https://usamodelkina.ru/uploads/posts/2021-05/1621433598_1-28.jpg" rel = "prettyPhoto">Demonstration model automation of irrigation and fertilization < a href = "https://usamodelkina.ru/uploads/posts/2021-05/1621433551_1-29.jpg" rel = "prettyPhoto"> Demonstration model automation of irrigation and fertilization Demonstration model automation of irrigation and fertilization Step six: final assembly
Now you can finally assemble the device. It uses an aquarium compressor to pump water into the main reservoir.
Demonstration model automation of irrigation and fertilization < a href = "https://usamodelkina.ru/uploads/posts/2021-05/1621433595_1-32.jpg" rel = "prettyPhoto"> Demonstration model automation of irrigation and fertilization Demonstration model automation of irrigation and fertilization < a href = "https://usamodelkina.ru/uploads/posts/2021-05/1621433557_1-35.jpg" rel = "prettyPhoto"> Demonstration model automation of irrigation and fertilization Blynk is used to manage the system.
 Demonstration model automation of irrigation and fertilization More details about the system, its assembly and operation can be found on the wizard page or on the video.

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