Upon my first time connecting external power to the Arduino, I noticed that the RX and TX leds are dimly lit all the time the power is connected. This is not the case when powering through USB.
Everything works when the Arduino is powered via USB, but nothing works (only the PWR led is lit as normal, and the TX and RX leds are constantly lit very dimly) when the DC power supply is connected.
Does everyone using an external power source experience this? In other words, is it a known and confirmed "bug"?
Another question: Would it hurt to keep RX and TX connected to each other all the time I don't use them, to work around this?
yes it's a confirmed bug, and no, that would be a bad idea to connect them together, as you would possibly damage both the USB chip and the Atmega, since when the Atmega TX is low the USB TX could drive current into it, and vice-versa
I haven't tried 0009 so far, since there's no Linux release, and I've been reluctant to compile from CVS. I'll take a look now.
that would be a bad idea to connect them together, as you would possibly damage both the USB chip and the Atmega, since when the Atmega TX is low the USB TX could drive current into it, and vice-versa