- Do you have anything connected to the ESP32?
- How is the ESP32 powered? Have you tried shorter USB cables or a different USB port?
- did you connect any wire to the RST / EN line of the ESP32?
I’ve not yet seen the failure mode where it initially detects the chip and then fails further down the line.
Very interesting. The usual error message is that DSR is all 0xFF (like here), but there seems to be some variation on your output.
This may indicate noise on the wires, or a GND connection issue. Have you replaced the wires between the debugger and the target board already?
There literally only two other google results for DSR (FFFFFFFC).
- vs code debug(jlink)问题 - ESP32 Forum, which says when translated that the user used Eclipse instead of VSCode…
- Segger J-Link with openocd (XMC Link) fails during connection - ESP32 Forum has no solution response.