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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.
@user85880
Hi thanks for the suggestion, erase also uses the esptool, so I get the same problem:
....\esptool-master\esptool.py --port COM9 --baud 115200 erase_flash
esptool.py v2.3-dev
Connecting........__.............................................__
A fatal error occurred: Failed to connect to Espressif device: Timed out waiting for packet header
Thanks for your help.