ESP01 code upload works with Arduino IDE but not with PIO?

Not really, I just mark it as solved.

In general, people just have to look out that they equalize the PlatformIO configuration for their board with the Arduino IDE settings – if it still doesn’t work after that, that’s a bug. What can be improved though is that PlatformIO gives the same defaults as the Arduino IDE. The esp01 definition does flash mode qio and reset method ck by default, but the Arduino IDE does dout and nodemcu.

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