We face many problems in crowded places it may cause it absence of children or go adults in unintended places of mistake, this is because of the large place or the many ways in that place. One of these places is the airport, especially the so-called Happiness Street. So, for that I looked for a convincing solution so that we could recognize about someone that went in the opposite direction (Wrong direction) instead of the right direction. The solution is to use the ultrasonic sensor and esp32-cam. Which works to measure the distance between him and the person passing through the happiness Passage. While the camera works to capture the person’s face when approaching a distance measurement sensor with a distance of less than 30 cm. The ultrasonic sensor is one of the best techniques to discover the distance between it and the person by measuring time lapses between the sending and receiving of the ultrasonic pulse. When a person approaches the sensor and the distance between it and the sensor reaches about (distance <30cm) Thus the sensor transmits an audio wave at a frequency higher than above the range of human hearing.

All studies contain restrictions and difficulties, but some difficulties can be found solutions and alternatives to them and some of them have no solutions or there are weak solutions. This project contains several goals, but in return it also contains some difficulties that may reduce the quality of the project. In general, this project is designed to detect the movement of the body in the opposite direction of traffic, as this system works on the Internet of things. One of these restrictions is the difficulty in capturing a person's face if the face is not directly opposite the camera. Another problem we face in this project is that the nodemcu 8266 updates the data every 16 seconds thus, it delays in sending data to the camera. For this reason, the images may appear a little late. The delay in taking pictures may delay the occurrence of an alarm and alert the security men.

The security men at the airport face many difficulties that may lead to wasting his time, increased fatigue, poor concentration and other difficulties. Consequently, alternatives must be searched, in other words, devices that reduce these difficulties. This project aims to detect people heading in the wrong direction and to make an alert to security men. One of the main objectives of the project. i. To Design circuit that monitors people heading in the wrong direction by ultrasonic sensor and esp32-cam. ii. To Display the distance on the LCD screen, capture the person's face, and warn the security man. iii. To Development of devices through the Internet of Things. iv. To Provide

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