Error -arduino IOException- Input/output error

Projects Programming
1

Hello,
I'm currently using my arduino uno to control a lamp. I am new in arduino. My lamp is working fine, but only for two on/ off. My code is really simple, I can not find something wrong. I have two arduino uno so I test this situation on both of them. I am really messed up. Does anyone have any idea of what happening?

const int Pin = 8;
int incomingByte;
void setup() {
Serial.begin(9600);
pinMode(Pin, OUTPUT);
}
void loop() {
incomingByte = Serial.read();
if (incomingByte == 'H') {
digitalWrite(Pin, HIGH);
}
else if (incomingByte == 'L' ) {
digitalWrite(Pin, LOW);
}
}

When I run my code I am receiving this error:
processing.app.SerialNotFoundException: ? ???????? ???? "COM8" ??? ???????. ????????? ??? ????? ??? ?? ????? ???????? > ???????? ????;
at processing.app.Serial.(Serial.java:191)
at processing.app.Serial.(Serial.java:77)
at processing.app.debug.Uploader.flushSerialBuffer(Uploader.java:77)
at processing.app.debug.AvrdudeUploader.uploadViaBootloader(AvrdudeUploader.java:175)
at processing.app.debug.AvrdudeUploader.uploadUsingPreferences(AvrdudeUploader.java:67)
at processing.app.Sketch.upload(Sketch.java:1671)
at processing.app.Sketch.exportApplet(Sketch.java:1627)
at processing.app.Sketch.exportApplet(Sketch.java:1599)
at processing.app.Editor$DefaultExportHandler.run(Editor.java:2380)
at java.lang.Thread.run(Thread.java:619)

This error causes the entire Arduino IDE when I run my code through that to freeze, and requires a restart of the IDE; also the USB cable must be unplugged and replugged in for the board to be detected again.

2

Your code is NOT being run something in your code/or the way you have the IDE setup is causing the IDE to crash.

Mark

3

I run my code for an hour and then crash. Other time crash in a minite or in ten minutes.
I reinstall the IDE.
I test it in different pc.
I test it in different arduinos.
I am really messed up. Does anyone have any idea of what happening?

4

Does anyone have any idea of what happening?

Something is interfering with the serial port that the Arduino is using. Do you have any bluetooth crap attached? Any software, like bluetooth, that polls the serial ports?

5

No I do not have any bluetooth. I only see the arduino in the serial ports.
Nice idea, but how can I check if any software is interfering with the serial port?