Mathew Beaneandclaude-flow d25fb8192e fix(firmware): stop POST /ota overflowing the httpd stack ...

MEASURED 2026-09-29 on an ESP32-S3 (v0.8.12, 16 MB): every POST /ota of a
valid 1,228,672 B image died with "stack overflow in task httpd" and
RTC_SW_CPU_RST, so no OTA had ever completed on this firmware.

- ota_update.c: set config.stack_size = CONFIG_OTA_HTTPD_STACK_SIZE (new
  Kconfig, default 8192; HTTPD_DEFAULT_CONFIG gave 4096). Move the 1 KB
  receive buffer off the stack into a static (handlers are serialised on
  the one httpd task). Integer progress percent instead of %f.
  recv_wait_timeout stays 30 s.
- Log the httpd stack high-water mark after every POST /ota and
  POST /wasm/upload so the size rests on device data.
- wasm_upload.c: GET /wasm/list builds its 2 KB JSON on the heap.
- RUNBOOK §3 (over the air) records the failure and the high-water-mark
  log line.

Device check after the fix (same S3): "httpd stack after POST /ota: 4900 of
8192 bytes never used", i.e. about 3.3 KB peak. The ADR with the full
hardware evidence follows in this series (ADR-379).

This overlaps PR #1594, which raises the same stack. If #1594 lands first,
drop this commit; the rest of the series does not depend on it.

Co-Authored-By: claude-flow <ruv@ruv.net>

2026-10-02 03:11:07 -04:00

..

esp32-csi-node

fix(firmware): stop POST /ota overflowing the httpd stack

2026-10-02 03:11:07 -04:00

esp32-hello-world

firmware/esp32-hello-world: ESP32-C6 target and ESP-IDF v6 build fixes (#524)

2026-05-17 18:00:45 -04:00

privshield

fix(esp32): correct mqtt component name + %u format casts; add build-verified examples

2026-08-09 15:46:39 -02:30