espp Core Dump Console (WebUSB / Web Serial)

Disconnected

This browser supports neither WebUSB nor Web Serial. Use a Chromium-based browser (Chrome / Edge / Opera) on a secure origin (https, localhost or file://).

Device

show all USB devices (no VID/PID filter)

Not connected. WebUSB talks to the vendor (0xFF) interface (default filter VID 0x1209); Web Serial talks to the CDC port, where the device console and the protocol share one stream — this page renders the console text and speaks the protocol at the same time.

Crash summary

Core dump download

core.elf drops the flash header before the ELF magic (trailing checksum bytes remain; ELF tools ignore them); the raw image is the whole stored blob.

0 / 0 bytes 0% -

Decode on your machine

Full decode (all tasks, registers, memory) with ESP-IDF's espcoredump.py, or quick backtrace-only resolution with addr2line. Replace build/coredump_example.elf with your app's ELF.

espcoredump.py info_corefile --core core.elf --core-format elf build/coredump_example.elf

xtensa-esp32s3-elf-addr2line -pfiaC -e build/coredump_example.elf <addrs>

Resolve backtrace locally (nearest symbol)

Pick your firmware's .elf (e.g. build/coredump_example.elf — it never leaves the browser) and the backtrace addresses from the summary are resolved against its symbol table (symtab/strtab only, no DWARF): results are nearest-symbol approximations, not exact source lines.

Firmware ELF: No ELF loaded.

Console / log

log raw frames

Trigger a test crash:

Speaks the espp coredump component's stream service (v2 frames shared with the espp OTA framing: magic "OT" + flags + module + type + len + payload + CRC-32; coredump is module 4, message types 0x40-0x43 / 0xC0-0xC4, one request in flight). Everything runs locally in your browser.