Atmega16U2 USB stops working with mains power glitches


hi,  project working on uses funduino mega 2560 copy of arduino mega 2560.

the projects calls communication between pc , mega 2560.  have small vacuum pump which, when switched on or off causes communication between pc , mega 2560 fail.

looking @ tx , rx pins see characters pc being sent delay between characters , instant reply atmega2560-16au pc doesn't receive reply.

i have tried 2 different applications on pc pretty sure atmega16u2 getting upset somehow.

when use rs232 port instead of usb between pc , funduino see no failure.

anyone seen this?  got suggestions?



Arduino Forum > Using Arduino > Installation & Troubleshooting > Atmega16U2 USB stops working with mains power glitches


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