HC-SR04 Ultrasonic Distance Sensor Arduino Nano Pin Setup:

Pin Setup:

Temperature (1Hz) Ambient temperature in degrees Celsius

10cm wire length

when the token passes by the reader

This board is used with Wi-Fi chips and Bluetooth Dual Mode

HC-SR04 Ultrasonic Distance Sensor Arduino Nano Pin Setup:This is the HC SR04 ultrasonic distance sensor. This economical sensor provides 2cm to 400cm of non contact measurement functionality with a ranging accuracy that can reach up to 3mm. Each HC SR04 module includes an ultrasonic transmitter, a receiver and a control circuit. There are only four pins that you need to worry about on the HC SR04: VCC (Power), Trig (Trigger), Echo (Receive), and GND (Ground). You will find this sensor very easy to set up