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Tue 2021.09.07
Thank you @MaBe for the prompt reply and above link.
re: 'some use 4 wires (qio) and some 2 wires (dio)'
In post #1 I pointed out a successful flash years ago using "1v89"
In addition pointed out that 2V00 just went flawlessly also.
In esptool.py I am using attribute
--flash_mode qiowith the same format in both those cases.Under the assumption pointed out above, I find it a bit of a stretch to now change flash modes when all that has changed on the Espruino firmware download servers is the version.
Robin
It is all about how the vendor manufactured the board, some use 4 wires (qio) and some 2 wires (dio) to communicate with the flash.