This IoT wiring diagram demonstrates a biometric door lock system. The central part is the NodeMCU controller which collects user fingerprint data from the sensor. As the fingerprint proof match the saved profiles, the controller connects to relay module that passes the current unlocking the solenoid lock. Following the wire connections help you have some idea about the components from power source to the sensor, lock and buzzer and gives comprehensive understanding of components integration. These components have come together to create a reliable and safe access control system. This overall system ensures reliable operation and enhanced safety measures for controlled entry.
