The 0.1.352 Docker image contained firmware compiled with CONFIG_ESPTOOLPY_FLASHSIZE=16MB
despite sdkconfig.defaults being updated to 4MB in d837598. Kaniko served a cached
firmware layer, bypassing the sdkconfig.defaults change.
Result: ESP32-S3 (4MB flash) flashed via Web Serial crashed on every boot:
spi_flash: Detected size(4096k) smaller than binary image header(16384k). Probe failed.
Fix:
- Add FIRMWARE_CACHE_BUST ARG before COPY in firmware stage (guarantees cache miss)
- Add RUN rm -f sdkconfig sdkconfig.old so idf.py set-target regenerates from
sdkconfig.defaults (CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y) on every build
Bumps version to 0.1.354 to trigger a fresh CI build.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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