Arduino IDE: Stuck Forcing reset using 1200bps open/close on port #7
Description
Uploading to an Adafruit Bluefruit Feather M0:
...
Sketch uses 75232 bytes (28%) of program storage space. Maximum is 262144 bytes.
Forcing reset using 1200bps open/close on port COM10
(Upload sequence is stuck after this line prints in the verbose output.)
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I usually get one successful upload with my PROTOTYPE4 sketch after running the "blink" sketch prior. then it repeatedly gets stuck on this line if I try to upload my PROTOTYPE4 sketch again.
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I cannot reproduce the same error with the "blink" sketch.