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...for the playground adafruit express gets stuck... avrdude: initialization failed, rc=-1 You appear to have selected the "Classic" rather than "Express" version of the board, which are different things. The classic you have selected uses an AVR ATMega32u4 like you'd find in the Arduino Micro/Leonardo. The "Express" uses an ...


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Turns out it was a board problem. Switched it for an older version of the NodeMCU. The newer ones are not known for the reliability it seems.


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