I recently got my first 2 Arduinos (MKR1000s) for a project. I hooked 1 up to a breadboard as shown and played around with it for a few hours. Then, after uploading an iteration of my code, the board’s serial port shut down. I tried swapping it out with my other one and after loading the code, the exact same thing happened.
To clarify, the devices boot and show up (on Mac) as USB devices, but there is no serial port available (in Arduino, processing, or terminal). I’ve tried both boards with multiple cords and multiple computers (Mac and Windows) and they all have the same problem. Did I somehow fry the boards?
I attached the breadboard configuration. The 2 wires offscreen are the positive and negative terminals from a low voltage (+/- 0.5V) analog audio device.