Reboot and flash through programmer

[luzat]

To ease development with my FTDI FT232R interface I found that the following connections are useful:

ESP32 Pin	Serial Pin	Comment
EN	RTS	EN = CHIP_PU (I think). Not broken out, but reachable through the soldered connection of the board button which points inward. Can be used to temporarily attach/solder a cable.
GPIO0	DTR	Labelled pin on the board

This can be done instead of shorting GPIO0 and GND and hitting reset. The tools automatically trigger a reboot and flashing mode that way. This should also work with CP2102 boards which have DTR and RTS available.

Additional information regarding the connection: https://github.com/espressif/esptool/wiki/ESP32-Boot-Mode-Selection#automatic-bootloader The CHIP_PU connection was deduced from the schematic.

Might be helpful to add that information?

[luzat]

Also, possibly include it in the wiring diagram.

[raphaelbs]

Oh wow! That's really helpful!

@luzat feel free to open a pull request adding this into the Instructions section.