Flashing

  • flashing

Tests show that esptool flashing speed saturates above 1152000 baud. Is this due to a hard rate limit imposed by the driver or protocol layer to keep communication stable?

This happens because host-side and chip-side processing time has already become the main bottleneck. Simply increasing the baud rate no longer provides a meaningful improvement in download speed.

esptool itself does not enforce such a limit. Under the current conditions, there is no practical way to further increase flashing speed.