Abstract :
In the last few years Indonesia has been faced with the problem of decreasing
decent and productive agricultural land. To deal with these problems, one form of
innovation that is now widely used by farmers in the world, especially countries
that lack agricultural land, is to use water as agricultural land or in general is
known as a hydroponic system. This study aims to create a new innovation related
to the irrigation mechanism in hydroponic plants with a more complex automatic
system including the plant irrigation circulation system, levels of nutrient solution
intake, watering plants and replenishing water tanks. The control system involves
the working of Ultrasonic sensors HC-SR04, DHT22 and pH sensors. Based on the
test results, the sensor is able to read values according to its specifications and
provide an accurate response to the output in the form of motor control as a water
recharging pump, a watering plant pump and a nutrition pump. The HC-SR04
Ultrasonic Sensor works with an accuracy level of 98.68 % and works accurately
when testing with a refill pump motor. DHT22 sensor works with an accuracy of
84.71 % of the humidity meter and works accurately when testing with a nutritional
pump motor with a benchmark reading from the sensor. The pH sensor works with
an accuracy level of 92.74 % for the pH value testing solution and works accurately
when testing with a nutritional pump motor with a benchmark reading from the
sensor. Based on the results of testing the overall tool work system, the percentage
of device working accuracy was 96.67 % with an error of 3.33 %.