![]() We can make this IoT Bidirectional Visitor Counter using ESP32 Development Module, a pair of ultrasonic Sensors, SSD1306 OLED Display, a Buzzer, and a Relay Module. We have an OLED Display to display the data locally. But this time we will use ultrasonic sensor and ESP32 and then send data to the Blynk IoT cloud. Previously, we have made the Visitor Counter Project using Arduino IR sensor & OLED Display. Whenever there are no persons present in the room, the light bulb turns off automatically. ![]() When a single person enters the room, the light bulb connected to a relay turns on automatically. Then, it calculates the total number of current visitors by subtracting the outgoing visitor from the incoming visitor. ![]() This device counts the total number of visitors entering through the entrance gate & also counts the total number of visitors exiting through the exit gate. You can use this ESP32 based IoT Bidirectional Visitor counter in the hall, shopping mall, and office entrance gate to count the total number of visitors. ![]()
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