Real-time medical cold storage monitoring and control system

Abstract

This report presents the implementation and results of Real-time medical cold storage monitoring and control system which employs a DHT11 sensor for temperature and humidity detection in pharmaceutical cold storage. This data can trigger short-term actions such as remotely controlling the freezing or heating of cold storage medications using two Peltier modules and relay switches (Relay switch 1 for Peltier module 1 and Relay switch 2 for Peltier module 2), one Peltier module is for heating and the other Peltier module is for cooling placed together. The two Peltier modules are connected to the H-Bridge motor driver. The H-Bridge changes the polarities of the Peltier modules by switching the relay switches forward and backward to maintain the temperature range of (20c-80c) such that when temperature drops below 2oc, the H-bridge motor driver changes polarity of Peltier module to heating and when temperature is above 80c, the H-bridge motor driver changes the polarity of Peltier module to cooling to maintain the temperature range of (20c-80c) for the safety of cold storage medicines. The Buzzer sounds for out-of-range temperatures and humidity (above 65%). The real-time sensor data from the medical cold storage is displayed on a mobile application on the pharmacist’s mobile phone or tablet to allow the pharmacists monitor real-time temperature and humidity in the medical cold storage. The system employs an Arduino UNO board, a DHT11 sensor, and a Bluetooth module, which creates a wireless communication with the mobile phone or tablet to allow real-time monitoring of temperature and humidity. The designed system helps medical personnel easily monitor the medical cold storage remotely without having them present at cold storage to visually take the readings of temperature and humidity of the cold storage. I recommend it be used by medical personnel for the proper safety of cold storage medications in hospitals, pharmaceutical industries, medical laboratories, etc.