the RX Led on the Uno shuld start flashing once talking to the Uno as seriel Interface?
I use Hterm on windows with baudrate 19200, 8 Databit, 1 Stopbit, parity 0.
The Uno is properly detected as serial port but nothing loops and no rx/tx led flashes.
My Problem: I always receive the error when tryig to load a sketch
avrdude: stk500_getsync(): not in sync: resp=0x00
Settings in Ardiono IDE (Board and Serial interface) are correct
Bootloader has been upladed to the Mega328 by ISP and Fuses of the Mega328 have been verified.
I am starting to think the second onboard atmega16 (usb-serial brige ?) is not working properly which leads me back to my initial question: If the RX led is not blinking on a loopback test or when trying to load a sketch, there is something wrong?