Design and implementation of a license-controlled vehicle emission monitoring system using PIC microcontroller

This article suggests a system for monitoring and controlling vehicle emissions that incorporates an RFID-based identification system. An RFID smart card is given to each license holder, and it contains their licensing information. The technology can be deployed within the car itself and is small enough to monitor and control pollution levels. To continually monitor the emission of dangerous gases like carbon monoxide (CO), a reasonably priced gas sensor is used. An LCD screen shows these gas levels in real time. The technology alerts the driver if the emission levels surpass a predetermined threshold. The technology receives the driver's license details from the RFID smart card if the driver disregards the warning and the pollution continues. The Regional Transport Office (RTO) receives an alert SMS for additional action, including license termination. To stop more emissions, the car is automatically turned off at the same time. The same RFID card cannot be used to restart the car once the license has been revoked. A PIC microcontroller controls the complete system, including sensor readings, display output, RFID data processing, and GSM connectivity for SMS alerts.