//T代表trig
//E代表echo
const int T2= 14;
const int E2= 15;
const int T1= 16;
const int E1= 17;
float s1;
float s2;
void setup()
{
Serial.begin(9600); //设置波特率
pinMode(T1, OUTPUT);
pinMode(E1, INPUT);
pinMode(T2, OUTPUT);
pinMode(E2, INPUT);
}
void loop()
{
digitalWrite(T1, LOW); //低高低电平发一个短时间脉冲去TrigPin
delayMicroseconds(2); // delayMicroseconds在更小的时间内延时准确
digitalWrite(T1, HIGH);
delayMicroseconds(10);
digitalWrite(T1, LOW); //通过这里控制超声波的发射
s1 = pulseIn(E1, HIGH) / 58.0; //将回波时间换算成cm
s1 = (int(s1 * 100.0)) / 100.0; //保留两位小数
digitalWrite(T2, LOW);
delayMicroseconds(2);
digitalWrite(T2, HIGH);
delayMicroseconds(10);
digitalWrite(T2, LOW);
s2 = pulseIn(E2, HIGH) / 58.0; //将回波时间换算成cm
s2 = (int(s2 * 100.0)) / 100.0; //保留两位小数
Serial.print("Distance:");
Serial.print(s1);
Serial.print("cm");
Serial.print("Distance:");
Serial.print(s2);
Serial.print("cm");
Serial.println();
delay(50);
}
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