August 25, 2010
about 2 years ago
I had problem uploading code to my Pro Micro from Arduino IDE … until I figured out the double tap dance. Is there some other way to make it work (other than the double reset)?
There are a few things that need to be updated on the info to avoid unnecessary trouble.
This board (current version) comes with Caterina bootloader, instead of Diskloader (as described in the Arduino Buying Guide page). Please update to correct that.
The Caterina bootloader is modified so that it does NOT enter bootloader mode unless you reset twice in short interval. This is specified in the “Firmware Note”. But it is not mentioned at all in the “Getting Started Tutorial”. As a result, uploading from Arduino IDE would not work directly.
Because there is no reset button on this board, to load user code onto this board (with Arduino IDE / AvrDude), you will need to short RESET pin to GND pin with a wire twice in short interval (right before or after you pressed upload in Arduino IDE or started AvrDude). This will bring the board to bootloader mode in order to receive the uploaded user code.
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