Alat Monitoring Air Menggunakan Kombinasi Sensor Berbasis SMS Gateway Dengan Kendali Arduino Nano

Abstrak

In daily life, water is an essential aspect to support daily activities. The use of water stored in a reservoir tank must be managed wisely. The filling of the water reservoir tank still relies on manual control and visual estimation, leading to several issues when the water level is unknown. Excess load on the reservoir tank can result in unnecessary water wastage. Additionally, if water turbidity occurs due to suspended solids, it can lead to the growth of fungi, algae, and bacteria. This can make the body susceptible to diseases due to insufficient monitoring for tank cleaning. Based on the problems found above, the writer designs a water level monitoring device that will send notification messages to users. Monitoring and controlling the water level utilize the SIM900A module with Arduino Nano microcontroller. The sensors used are a combination of ultrasonic sensor and reed switch water level sensor to achieve accurate detection results. The ultrasonic sensor is employed to detect the reflection distance from the water surface, while the reed switch water level sensor is installed at specific points to detect the water level. The result of this research is that the device operates in accordance with the designed working principle. The water level sensor installed in the water reservoir works well with an accuracy rate of 96.66% and an error rate of 3.33%. The ultrasonic sensor is capable of detecting the reflective distance from the water's reflection with an accuracy rate of 98.406% and an error rate of 1.594%. To achieve accurate monitoring results, the ultrasonic sensor is placed above the water surface and the water level sensor at a specific point. The message transmission process relies on the presence or absence of pulses on the SIM card used, controlled by the microcontroller Arduino Nano.