USB connection stopped working

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macbook air, os x 10.9.5
arduino uno, atmega 328p
esp13 wifi shield

i trying esp13 work uno. had esp on top of uno , connected uno mac usb-wire. in beginning connection between mac , uno worked fine, no problem. after while experimenting sketch usb connection stopped showing up. can't see usb-port neither in arduino nor in hardware-list in mac.

i think happened after uploading sketch had changed "(2, 3)" in command else:
#include <softwareserial.h>
softwareserial espserial(2, 3);

i still can connect other unos mac without problem, usb-port shows should.

you need post code can see can see.

does problem uno work if remove shield?

...r


Arduino Forum > Using Arduino > Interfacing w/ Software on the Computer > USB connection stopped working


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