When the USB is not connected and the COM port is not open, system crashes. #527
Description
When COM port is open ;
- LED_BLUE is blinking.
- Green led on when I press the button.
When COM port is close or USB unconnection ;
- LED_BLUE blinking several times and stops.
- Green led not working when I press the button.
System crashes when the com port is not open. How can we deal with this?
void setup()
{
pinMode(LED_BLUE, OUTPUT);
pinMode(LED_GREEN, OUTPUT);
pinMode(USER_BTN, INPUT);
SerialUSB.begin();
}
void loop()
{
SerialUSB.println("Hello from app.");
digitalWrite(LED_BLUE, !digitalRead(LED_BLUE));
if (digitalRead(USER_BTN) == HIGH) {
digitalWrite(LED_GREEN, HIGH);
}
else {
digitalWrite(LED_GREEN, LOW);
}
delay(100);
}