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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@user88728
Try to use another port (instead COM9). Under Linux use
esptool.py --port /dev/ttyUSB1 --no-stub chip_id(insteadttyUSB0)I found https://www.esp32.com/viewtopic.php?f=2&t=4912