I've written a small program for Arduino, in which it receives a two digit number from serial, for example ""26". Then it set's HIGH voltage to pin 2 with the duration of 6*100. That works fine, except that I also have a LED connected to pin 4, and it's voltage is set to HIGH at start-up, but when Arduino is receiving/sending through serial, it drops the voltage - is that normal?
The code is as follows:
int pts = 4;
String input;
void flash(int pin, int duration){
Serial.println(pin);
Serial.println(duration);
pinMode(pin, OUTPUT);
digitalWrite(pin, HIGH);
delay(duration);
digitalWrite(pin, LOW);
}
void setup() {
input="";
digitalWrite(pts, HIGH);
pinMode(pts,OUTPUT);
Serial.begin(9600);
}
void parseInput(){
if(Serial.available()>0){
//digitalWrite(led, LOW);
char incomingByte=(char)Serial.read();
input+=incomingByte;
delay(10);
}
else{
if(input!="")
{
flash(input[0]-'0', (input[1]-'0') *100);
}
input="";
}
}
void loop()
{
parseInput();
}
main()is part of the library code. The key concept is that it callssetup()once and then callsloop()repeatedly (while also doing other internal functions). – Dave Tweed♦ Apr 19 at 16:01