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const int Trigpin=2;
const int Echpin=3;
float cm;
char i;
void setup() {
// put your setup code here, to run once:
pinMode(Trigpin,OUTPUT);
pinMode(Echpin,INPUT);
pinMode(10,OUTPUT);
pinMode(8,OUTPUT);
pinMode(9,OUTPUT);
digitalWrite(10,HIGH);
digitalWrite(8,HIGH);
digitalWrite(9,HIGH);
Serial.begin(9600);
}
int cmm()
{
digitalWrite(Trigpin, LOW);
delayMicroseconds(2);
digitalWrite(Trigpin, HIGH);
delayMicroseconds(10);
digitalWrite(Trigpin, LOW);
cm = pulseIn(Echpin, HIGH) / 58.8235; //
//cm = (int(cm * 100.0)) / 100.0; //
return cm;
}
void openlight()
{
digitalWrite(10,LOW);
digitalWrite(8,LOW);
}
void closelight()
{
digitalWrite(10,HIGH);
digitalWrite(8,HIGH);
}
void loop() {
// put your main code here, to run repeatedly:
if(Serial.available())
{
char i=Serial.read();
while(i=='a')
{
openlight();
if(Serial.available())
{
char j=Serial.read();
if(j=='b') {
digitalWrite(8,HIGH);
digitalWrite(10,HIGH);
break;}
}
}
while(i=='b')
{
closelight();
if(Serial.available())
{char j=Serial.read();
if(j!='b') {
digitalWrite(8,HIGH);
digitalWrite(10,HIGH);
break;}
}
}
}
else{
int a=cmm();
if(a>0&&a<=110)
{delay(500);
int b =cmm();
if(b>0&&b<=110){
delay(15000); }
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