LOOPBACK FAILS.
I previously posted about failure using the loopback using serial monitor. My previous post was:
and the consensus was that the clone UNO-R3 was bad. I sent it back and bought a genuine UNO-R3 from Digi-Key. Same failure. So I tried the board on my laptop using Ubuntu 12.04 and the loopback on the board works fine. So it is NOT the hardware. The failing serial monitor is on a Windows 2000 system. I can make the IDE work by using my BoArduino and an FTDI connection but not with the UNO. I went into device manager and forced an update of the driver and pointed to "Arduino/drivers/Arduino UNO REV3.inf", which Windows seemed happy with. The FTDI and UNO-R3 have different COM ports but the one for the UNO still fails even though it is listed as for the R3.
QUESTION: Is there an incompatability between IDE 1.0.2, which I am using, and Windows 2K? I just can not make the loopback work on a UNO.
If it is a rather old OS like win2K, does that mean the mainboard is of the same age ?
In that case you might have USB 1 only.
This might have impact to the support of your Arduino too.
Check start - settings -control panel - system - hardware - device manager, and see if you can find out if you have USB 2 or higher on your board.
If it is not stated, you should assume USB 1 (or < 2).
You can also look up what main board you have and find out what USB it supports.
I do not know whether USB < 2 will be an issue for the driver or IDE, but it won't hurt to check this out.
I have a 3.00 GHz CPU with 2 gigs ram with USB 2 and I regularly run external drives through my USB with no slowdown or problems. I even lowered the serial monitor baud to 4800 but loopback still fails. At 4800 if I send 80 characters only 5 are echoed. Higher baud rates return more characters, though not all are echoed, but only the first SEND will echo. The serial monitor has to be exited and reopened to get another echo. I could boot to an XP system but it is not yet setup to work with the IDE. The problem always comes back to how the IDE talks via the serial monitor to a board using the USB, I was hoping to use my time doing something with the UNO rather than using my time to make the IDE work. The photos below, from my original posting, demonstrate the failure.