Design of Smart Garden Based On The Internet of Things (IoT)

Currently, the control of cultivated plants is still manual, where farmers watering and checking soil moisture on the planting object. However, we cannot avoid technological progress in this life because technological progress will run following scientific advances. Therefore, every innovation is created to provide positive benefits for life. The ideal chili cultivation planning requires information about climatic conditions that play a significant role in chili cultivation is rainfall. Plant growth will be incredible if there is sufficient water supply; humidity for chili plants ranges from 60-80%. Therefore, chili cultivation planning must pay attention to rainfall because related to water availability. Smart Garden prototype design is a solution for taking appropriate actions during extreme weather and reducing human error. A prototype Smart Garden-based Internet of Things (IoT) using the Blynk app as User Interface (GUI) in the monitoring system and using the Soil Moisture sensor as input for soil moisture conditions, where the results of the process are sent via Wemos D1 mini-module to the Blynk server to display the state of soil moisture and automatic watering. Keywords— Blynk, IoT, Chilli Cultivation, Smart Garden.


I. INTRODUCTION
In everyday life, everyone has different habits in filling their free time and life. It can be filled with hobbies that make the heart happy, namely hobbies. Hobby is an activity that is often done by humans and makes humans who do it can be entertained. Some examples of hobbies that humans do are fishing, futsal, basketball, raising livestock.
According to Efendi and Yoyon (2018), stating that the Internet of Things (IoT) can be used in buildings to control various kinds of electronic equipment such as lights and room temperature that can be operated or turned on remotely via computer or smartphone networks, it is unavoidable that progress Today's increasingly rapid technology must be used, studied and applied in everyday life The way the Internet of Things (IoT) works, according to Safrianti Ery and Afiantoni (2020) is by utilizing a programming argument where each argument command can produce an interaction between machines that are connected automatically without human intervention and within as far as possible. The internet which is the link between the two machine interactions The IoT concept is actually quite simple with the way it works referring to 3 main elements in the IoT architecture, namely: Physical Goods equipped with IoT modules, Connection Devices to the Internet such as Modems and Speedy Wireless Routers like in your home, and Cloud Data Center where to store applications and database.
According to Kurnia Deni (2016), Smart Garden is a prototype of an automatic plant care or monitoring system, where the monitoring system is designed through the Blynk IoT application. The design of this prototype aims to help control the cayenne pepper plant care system at the individual level (personal user).
Humidity for cayenne pepper plants ranges from 60-80%. High humidity will make plants susceptible to disease. Conditions of high rainfall can cause cold temperatures to increase dramatically so it is necessary to set a more tenuous Plant cultivation is currently in a problem of limited time and opportunity to carry out maintenance, which requires an idea to be able to have your own chili garden easily and practically. Then the Internet of Things (IoT) is needed to help human work with the help of technology. Internet of Things is a scenario that utilizes internet and computer network connections that are developed for objects, sensors, and devices that are used daily (Kusuma, et al, 2019).
According to Sakaki et al (2018), states that the soil moisture sensor depends a lot on the sample which can be defined as the volume of soil around the sensor. Where changes in water content affect sensor readings. Multiple and continuous sampling to determine accurate volumetric moisture content values. Detailed quantification of the sampling volume including the effect of the electromagnetic energy density distribution decreasing with distance from the branch surface can be performed numerically.
The problems faced by plant cultivation farmers today are the unavailability of appropriate information and limited time for watering and fertilizing plants. Giving water to plants automatically which is controlled by an Arduino microcontroller based on data from measurements or detection of temperature and humidity around the plant by the DHT11 sensor is a solution to ease the work and increase farmer productivity (Jamal, 2017).
According to Kusuma, et al (2019), states that the Soil Moisture Sensor Module is a module that functions to detect soil moisture levels and can also be used to determine whether there is water content in the soil around the sensor. This sensor is used to test soil moisture, when the soil is experiencing a lack of water, the output of the module is at a high level, or the output is at a low level.

Height
: The monitoring process is carried out by reading the DHT11 sensor output and processed using the esp8266 module. The system takes the last condition of the sensor output reading and checks the connection on the esp8266 module to display the nominal temperature on the Blynk application.
c. Flowchart of soil moisture monitoring process The process of monitoring soil moisture is carried out by reading the output of the Soil Moisture sensor and processed using the esp8266 module. The system will read the last condition read by the sensor, then the esp8266 module will check the connection and display the nominal temperature on the Blynk application. The watering process is carried out by paying attention to the temperature and humidity of the soil. On the Blynk application screen there is a nominal display of temperature, soil moisture, and a watering pump switch. If the switch is positioned "ON" the esp8266 module will send a signal to the relay, the relay is connected to the watering pump and the pump will turn on.  (2019) stating that Wemos is one of the board modules that can function with Arduino, especially for projects that carry the IOT concept. Wemos can run standalone without the need to be connected to a microcontroller, in contrast to other wifi modules that still require a microcontroller as the controller or the brain of the circuit, wemos can run standalone because it already has a CPU that can program via serial port or via OTA and transfer programs wirelessly.

III. RESULTS AND DISCUSSION
Step of method: The sensor value that is read when the soil condition is saturated is 322 and when it is dry it is 1024. The sensor value and humidity contained in the table are used as the upper and lower limits in the interpolation of determining the value of moisture in normal soil.
f. Smart Garden results in a dry state

IV. CONCLUSIONS
From the tests carried out, the results of this study can be concluded: 1) When the soil moisture sensor detects moisture in the soil and the DHT11 sensor when it detects the temperature the system is working properly it can send a data signal to the blynk application via the wemos D1 mini module. Soil moisture test obtained 1024 results when dry and 466 when wet, as well as in the ambient temperature test obtained 32ºC. 2) In the watering system using a pump and flowed by a pipe. The pump is run through the blynk application which has an on/off button which then sends a signal to the Wemos D1 mini output in the form of a 5 volt voltage which then turns on the relay, the relay contact is given a voltage of 12 v according to the pump's needs. The watering system works well..