View source for Microduino Ultrasonic ranging-OLED display distance

{{Language | Microduino 超声波测距-OLED显示}}
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==Objective==
This tutorial will teach you using the ultrasonic sensor to measure distance and displays on Microduino OLED.

==Equipment==
*'''[[Microduino-Core]]'''
*'''[[Microduino-FT232R]]'''
*'''[[Microduino-Cube-S1]]'''
*'''[[Microduino-OLED]]'''
*Other equipment
**USB cable             one 
**Ultrasonic sensor     one


==Schematic==
[[File:Microduino超声波OLED显示原理图.jpg|600px|center|thumb]]


==Program==

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


==Debug==

Step 1：Stack all the required Microduino module, as follows:
[[File:Microduino超声波OLED显示连接图.jpg|600px|center|thumb]]

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.
[[File:Microduino超声波OLED显示测距图.jpg|600px|center|thumb]]


==Result==

OLED will display the distance between sensor and object.

==Video==



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