Microduino Ultrasonic ranging-OLED display distance

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Objective

This tutorial will teach you using the ultrasonic sensor to measure distance and displays on Microduino OLED.

Refer to UltrasonicOLED

The following is the distance measurement algorithm:

digitalWrite(TrigPin, LOW); //Send a pulse to TrigPin

delayMicroseconds(2);

digitalWrite(TrigPin, HIGH);

delayMicroseconds(10);

digitalWrite(TrigPin, LOW);

cm = pulseIn(EchoPin, HIGH) / 58.0; //Convert the timer to distance (cm) (The propagation of sound speed is 340 m/s)

cm = (int(cm * 100.0)) / 100.0; //Keep two decimal places

Step 1: Stack all the required Microduino module, as follows:

Step 2: Compile the program and download it.

Step 3: Run program, put a object in front of sensor, then move it, observe the OLED's value.

OLED will display the distance between sensor and object.