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All Journal Indonesian Journal of Innovation Studies
Izza Anshory
Program Studi Teknik Elektro, Universitas Muhammadiyah Sidoarjo, Indonesia
Computer Science & IT Education Engineering Law, Crime, Criminology & Criminal Justice

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Real Time CO Gas Monitoring System Using ESP8266 and Telegram: Sistem Pemantauan Gas CO Secara Real-Time Menggunakan ESP8266 dan Telegram Rony Setiawan; Izza Anshory
Indonesian Journal of Innovation Studies Vol. 26 No. 3 (2025): July
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i3.2062

Abstract

General Background Carbon monoxide (CO) is a toxic gas that cannot be detected by human senses and poses significant health risks in indoor environments. Specific Background Increasing air pollution and limited awareness highlight the need for real-time monitoring systems capable of detecting hazardous gas concentrations. Knowledge Gap Previous monitoring systems were limited by the lack of IoT integration and real-time notification features for users. Aims This study aims to design and implement an IoT-based monitoring system for detecting CO gas levels using ESP8266 integrated with Telegram notifications. Results The system utilizes an MQ-7 sensor to measure CO concentration and successfully transmits data to users, showing stable readings between 10.54 PPM and 20.24 PPM, with automatic alerts triggered when levels exceed 20 PPM, activating buzzer and fan responses. Novelty The integration of MQ-7 sensor, ESP8266, and Telegram enables real-time monitoring and automated alert mechanisms in a single system. Implications This system provides a practical solution for indoor air quality monitoring and supports early detection of hazardous gas exposure to reduce health risks. Keywords: Carbon Monoxide, Internet of Things, MQ-7 Sensor, ESP8266, Air Quality Monitoring Key Findings Highlights System detects hazardous gas threshold and triggers automated warning devices Data transmission to users occurs instantly through messaging platform Sensor readings remain stable under normal environmental conditions
IoT Based Smart Door Lock With QR Code Access: Kunci Pintu Pintar Berbasis IoT dengan Akses Kode QR Irsyad Nafi Afriadi; Izza Anshory
Indonesian Journal of Innovation Studies Vol. 26 No. 3 (2025): July
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i3.2064

Abstract

General Background The development of digital technology has enabled more advanced and practical home security systems. Specific Background Smart door lock systems are increasingly used to replace conventional locks due to their flexibility and remote control capabilities. Knowledge Gap Existing systems often rely on single authentication methods and lack integrated control through mobile applications and IoT connectivity. Aims This study aims to design and implement a prototype smart door lock system using QR code authentication integrated with an IoT platform. Results The system utilizes NodeMCU ESP8266, relay modules, solenoid door lock, and Blynk application, showing successful operation with WiFi control at a distance of 9 meters with obstacles and 11 meters without obstacles, and an average response delay of 1.1 seconds. Novelty The integration of QR code authentication with Blynk-based IoT control provides a combined access and remote control mechanism within a single system. Implications This system offers a practical solution for improving home security with remote access and real-time control through mobile devices. Keywords: Smart Door Lock, Internet of Things, QR Code, NodeMCU ESP8266, Blynk Key Findings Highlights System operates reliably within limited wireless range conditions Command execution shows consistent response time under testing scenarios Integrated authentication and remote control functions operate in one platform
Co-Authors Irsyad Nafi Afriadi Rony Setiawan