Radio Frequency Communication for Data Transceiver in Fluid Pressure Monitoring on U-tube

Fluid Friction in Pipes Unit with Hydraulics Bench (AFT/B) is designed to determine the coefficient of friction in pipes of some diameter and roughness, and to study pressure losses on various types of valves. Measuring pressure of liquid is using manometer analog. Development of radio frequency communications can help people share information. Unfortunately, conventional measurement of fluid pressure in manometer is inaccurate, spending much time, and a lot of human error. In this paper, we used radio as a communication to share data. We also used an ultrasonic sensor to measure the difference height of tube. Data will be sent via transmitter nrf24L01 and HC12 using FSK and GFSK modulation which have frequencies 2.4 Ghz. and 433Mhz. A receiver obtains data and sends to many users using Raspberry Pi 3. The accuray of measurement sensor is 99,34%, manometer worked properly, radio HC 12 can transmit data until 400 meters, and radio nrf24l01 200 meters.