The reason this mode is needed is because some usb serial drivers (one example is the Arduino Due's native usb serial) expect dtr to be active or it refuses to write to serial. Other than setting dtr during serial communications this mode acts like none so the intermediate micro being communicated through needs to handle resetting the esp chip.
The reason this mode is needed is because some usb serial drivers (one example is the Arduino Due's native usb serial) expect dtr to be active or it refuses to write to serial. Other than setting dtr during serial communications this mode acts like none so the intermediate micro being communicated through needs to handle resetting the esp chip.