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Tech-Stack: Arduino-UNO, NodeMCU-ESP8266, Ultrasonic sensor, Servo-motor, OLED-display, Preprocessing-3-RADAR-Screen, IFTTT Notifications service, Buzzer, Buttons. System to check surrounding area on a Processing3 radar screen and alert the user via IFTTT notifications service if the object is closer to a specific range. On/off switch, as well a…