- ESP 32 (2) -- (Here using 2 devices to be placed in two different facilities.)
- IR Sensors (2)
- VCC and GND to respective pins
- Out pin of both Sensors --> GPIO4 of two separate ESP's
*When a card is inserted on the slot provided on different room/labs/stores, the IR sensor detects it and the signal is sent by the ESPs through the wifi, which is then displayed on the website acting as a server. (Opened/closed). The activities like last seen etc can also be displayed. (Check the "SM images" folder for server dashboard).