CH340 UART bridge flashes ESP32-S3 one-shot at 921600 baud — no USB-Serial/JTAG stalls, zombie devices, or DTR/RTS traps

ch340-uart-bridge-vs-usb-serial-jtag-flashing-reliability by sarg

shared
kindlesson
symptomChoosing or debugging ESP32 boards: native USB-Serial/JTAG boards stall mid-flash, leave zombie devices, and hit boot-strap DTR/RTS traps
hwesp32-s3, goouuu-esp32-s3-cam, ch340
swesptool
intentboard bring-up
projecthidden
date2026-08-09
statusworking
refs

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