RANCANG BANGUN SISTEM KENDALI SUHU DAN KELEMBAPAN PADA LEMARI ARSIP BERBASIS IOT

Auzanukhoir, Hafiz (2026) RANCANG BANGUN SISTEM KENDALI SUHU DAN KELEMBAPAN PADA LEMARI ARSIP BERBASIS IOT. Sarjana (S1) thesis, Universitas Muhammadiyah Indonesia.

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Abstract

Physical damage to paper archives often occurs due to suboptimal control of
microclimate parameters in storage spaces. Preventive preservation requires
maintaining the storage temperature between 20 − 30∘C with relative humidity
levels at 45 − 60% RH. This study aims to design, evaluate sensor characteristics,
and analyze the performance of an IoT-based automatic temperature and humidity
control system inside a ±30 × 20 × 25 cm teak wood mini archive cabinet using
an ESP32 microcontroller. Air conditioning inside the cabinet is automatically
managed using a thermoelectric semiconductor Peltier Cooling System Kit TEC1
12706 through a 5V optocoupler relay driver module. The control system is
designed using an OR logic gate with an upper activation threshold of humidity >
60.0% RH and a lower deactivation threshold of humidity ≤ 58.0% RH, equipped
with a 60-second non-blocking safety timer protection feature based on the millis()
function to prevent rapid switching electrical wear (ping-pong effect). The 70
minute static test results show that the DHT22 sensor recorded a fluctuation
deviation of ±0.5∘C for temperature and ±0.6% RH for humidity, which are within
the manufacturer's tolerance limits of ±0.5∘C and ±2% RH. In the dynamic test,
the sensor recorded a transient change characterized by a temperature reduction
of 0.30∘C in the second minute after the actuator was activated. The integration
test shows that the automatic circuit activates the Peltier when humidity exceeds
the upper limit and deactivates it when humidity reaches 57.9% RH. The Blynk IoT
application updates environmental parameters periodically and limits warning
notifications to only once without duplicate message redundancy (spamming).

Item Type:	Thesis (TA, Skripsi, Tesis, Disertasi) (Sarjana (S1))
Contributors/Dosen Pembimbing,NIDN Dosen bisa diakses di LINK https://bit.ly/NIDNdosenunismabekasi:	Contribution Contributors / Dosen Pembimbing NIDN UNSPECIFIED Samsiana, Seta 0410047602 UNSPECIFIED Sugeng, Sugeng 0424127501
Keywords / Kata Kunci:	Lemari Arsip, ESP32, Peltier, Sensor DHT22, IoT Blynk, Safety Timer.
Subjects:	Elektronik Kendali/Kontrol
Faculty:	Fakultas Teknik > Teknik Elektro S1
Depositing User:	Mr. Hafiz Auzanukhoir
Date Deposited:	31 Aug 2026 07:58
Last Modified:	31 Aug 2026 07:58
URI:	http://repository.umindonesia.ac.id/id/eprint/10839

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