Yesterday evening everything worked well. Today morning I am trying to upload sketch to the Arduino (nano china, CH340) and get the following:
Writing | avrdude: stk500_paged_write(): (a) protocol error, expect=0x14, resp=0x00 ############avrdude: stk500_cmd(): programmer is out of sync avrdude: stk500_recv(): programmer is not responding
Check wiring, settings, cable, another PC. The same result. Took another Arduino from the same supply. Works.
What could damage my Arduino nano? Static voltage? This is the first time in 3 years of insensitive playing with Arduino. I was told that Arduino nano is quite tolerant to static voltage.
What can I do with this damaged Arduino? Is it possible to restore it? The boards is still recognizable by PC and blinks with leds when it is connected.