I managed to flash ESP3D to cheap ESP-12F based serial wifi module (eg from aliexpress ). It contains built in 2way levelshifter. So we can power and use with 5V.
- We need to manualy ground the IO0 to start in flash mode while powering up (there is no switch for that, neither for reset)
- I used FTDI adapter as usb2serial
- We have to see in console/serial monitor boot mode is (1,7).
- baudrate: 74880
rst cause:2, boot mode:(3,7)
- Then flash like other esp based board for esp3d
- check flash size. Mine has 4M