IoT Visitor Counter with Smartphone Alert Limit People Entry Covid 19 protocol

Published Aug 25, 2021

CDDL-1.0

1 hours to build

Beginner

nodemcu

blynk app

Wifi Visitor Counter that counts people entering through gate & displays number in Device screen & Smartphone App via net. When maximum no. of people enters it alerts with beep & Flashing Led & also send Notification to Smartphone. Can be used to limit/count people entry in Mall , Shop , office , Restaurants etc. following Covid 19 Protocol .It can stop stampede save Life for overcrowding.

Components Used
NodeMCU NodeMCUNodeMCU	X 1
Buzzer 5V Buzzer 5V	X 1
LED 5mm LED 5mm	X 1
SSD1306 OLED display OLED (Organic Graphic Display) display modules are compact and have high contrast pixels which make this display easily readable. They do not require backlight since the display creates its own light. Hence they consume less power. It is widely used in Smartphones, Digital display.	X 1
Resistor 10 kOhms Metal Film Resistors - Through Hole 10 kOhms 250 mW 1% 100 PPM / C	X 1
E18-D80NK Sensor Infrared Sensor	X 1
MT3608 Step Up Power Module Booster	X 1

Description

Connect NodeMCU with Infrared Sensor , Buzzer , Led as per Circuit Diagram.

Testing the prototype in Breadboard. When the sensor detects an obstacle it displays the number in Device screen & Smartphone App Blynk via internet. Also make a beep sound with buzzer for 1.5 seconds. And when maximum no. of obstacle or people enters it alerts with beep & Flashing Led for 10 seconds & also send Notification to Smartphone. After 10 sec only the screen & Led will continue flashing. If some one enters again it will send Notification & repeat the process. The Counter can be Reset to zero by pressing reset button via App.