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All Journal Jurnal Ilmiah Teknik Informatika & Elektro (JITEK)
Frengki Ditus Laia
Universitas Prima Indonesia
Computer Science & IT Electrical & Electronics Engineering

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Pengembangan Penghangat Cairan Infus Berbasis IoT dengan Pemantauan Suhu Menggunakan NodeMCU ESP8266 dan Blynk Terintegrasi Frengki Ditus Laia; Christin Erniati Panjaitan
Jurnal Ilmiah Teknik Informatika & Elektro (JITEK) Vol 4, No 2 (2025): Jurnal Ilmiah Teknik Informatika & Elektro (JITEK), Juli
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jitek.v4i2.6198

Abstract

Perioperative hypothermia can be aggravated by the administration of low-temperature intravenous fluids, creating a need for controlled warming and monitoring. This study develops an Internet of Things (IoT)-based infusion fluid warmer prototype using a NodeMCU ESP8266, DHT11 sensor, 5 V DC relay, STC-1000 digital thermostat, an incandescent lamp as the heating element, and the Blynk application. A Research and Development approach was applied through circuit design, programming, prototype construction, thermal testing, and connectivity testing. The prototype used a 39-40°C control band, with the heater switched off at 40°C and reactivated at 39°C. Across seven initial conditions of 26.3-31.6°C, the recorded time to reach 40°C ranged from 5.7 to 21.45 minutes. NodeMCU connectivity tests at 1-10 m remained connected, with 0-second recorded delay at 1-9 m and 1 second at 10 m. The results demonstrate basic control and monitoring functionality; however, clinical suitability cannot be concluded because outlet-fluid temperature, sensor accuracy, long-term stability, electrical safety, and patient testing were not validated.
Co-Authors Christin Erniati Panjaitan