Got d1-mini clones and not able to flash them

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MaBe
Did some test with different board
1. poor usb to serial chips or driver implementation need slow baud rate like 115200
2. flash modes like qio/dio are esp-vendor-board specific
Workaround for 1. is to use a usb to serial adapter directly connected to TX, RX and GND to use higher baud rates.

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