Journal of Advances in Developmental Research

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Node MCU Based Alcohol Sensing Engine Lock using GPS & GSM

Author(s) K. Venkata Ravi Kumar Reddy, B. Prakash, M. Sree Vidhya, M. Sai Durga Prasad, S. Mounika
Country India
Abstract Road accidents caused by drunk driving remain one of the major threats to road safety. To address this issue, this project proposes a Node-MCU-based alcohol sensing and engine locking system integrated with GPS and GSM modules. The system employs an alcohol sensor to detect the presence of alcohol in the driver’s breath. If alcohol concentration exceeds a predefined threshold, the Node-MCU disables the vehicle’s ignition system through a relay/engine lock mechanism. Simultaneously, the system activates an alert via a buzzer and displays the status on an LCD. In addition, the GPS module provides real-time location data, while the GSM module transmits an alert message containing the driver’s location to registered contacts or authorities. The system also integrates auxiliary components such as a power supply , push buttons, and a servo motor for enhanced control. This smart embedded solution ensures driver safety, prevents drunk driving, and enables quick emergency response through GPS and GSM communication.
Keywords Node MCU,Alcohol sensor,Vibration sensor ,Accelerometer sensor,DC Battery (5V),Servo motor ,LCD display, GSM module, GPS module,Buzzer
Field Engineering
Published In Volume 17, Issue 1, January-June 2026
Published On 2026-04-04
Cite This Node MCU Based Alcohol Sensing Engine Lock using GPS & GSM - K. Venkata Ravi Kumar Reddy, B. Prakash, M. Sree Vidhya, M. Sai Durga Prasad, S. Mounika - IJAIDR Volume 17, Issue 1, January-June 2026.
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