Chat freely about anything...
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By xtal
#37567 Use a crystal controlled USBRxTx converter , if you want more reliable loads..
8 out of 10 of my FT232RL adapters would fail FW loads ,but short transmissions work fine, making you think your
adapter is fine....
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By jmorrison
#69746 I had this same error message - I really thought it might be a cabling/power problem. I tried editing esptool.py, it helped a little but was still unable to flash it.

Updated esptool to the latest and it worked right away! My old esptool.py worked fine flashing other builds but wouldn't load nocemcu firmware.