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ESP32 lows: hotspot by interface, setup validation, one OTA at a time, WPA2 floor - #577

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mariusandra merged 1 commit into
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lows-esp32
Oct 18, 2026
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ESP32 lows: hotspot by interface, setup validation, one OTA at a time, WPA2 floor#577
mariusandra merged 1 commit into
mainfrom
lows-esp32

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@mariusandra

@mariusandra mariusandra commented Oct 18, 2026

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The nine items in the "ESP32 — low" list of docs/embedded-todo.md. The Pico items are left for #499, which rewrites that half.

  1. Hotspot check by interface. request_from_hotspot decides by the address the connection arrived on (fos_wifi_addr_is_portal_ap()): the AP interface must be up, and the station must not hold that same address. Before, any client on a home LAN numbered 192.168.4.0/24 counted as being on the hotspot.

  2. /api/setup validation. The console and the setup form now share fos_display_panel_known() and a new fos_assets_mount_point_valid(), which has host tests. The mount-point rule:

    • absolute, 2–15 bytes, no trailing slash
    • plain characters, no . or ..
    • not under /state or /dev

    The console never validated assets_path either, so both paths check it now. A value that hasn't changed still saves, so a legacy setting can't block saving Wi-Fi.

  3. One OTA at a time. The cloud OTA task takes the backend check's lock. It waits up to 15 min, then logs ota:cloud skipped another-ota-running. The "already running" flag is set atomically.

  4. Over-long console line. It is refused once and everything up to its newline is dropped. The logic is the header-only fos_console_line.h, tested by tests/test_fos_console_line.c, which is added to the e2e-docker host-test step.

  5. Asset job queue in PSRAM. Its ~5 KB of storage now comes from fos_big_malloc (internal heap on the C3). The control block stays internal.

  6. wake_schedule in local time. It aligns using the offset the schedule already uses: the configured zone, else the provider's flat offset. The logic is fos_wake_aligned_sleep_seconds(), with host tests for UTC, +5:30 and Brussels across both 2026 DST changes. Only frames with wake_schedule on are affected.

  7. Retired OTA status fields removed: retryAttempts, requestMode, resumable, bootRequestSupported, partialRequestBytes, wifiSettleMs. Nothing on the backend, the cloud or the SPA reads them.

  8. WPA2 floor. ⚠️ WPA1-only (TKIP) networks stop connecting and log no_ap_found_in_authmode_threshold. Mixed WPA/WPA2 and WPA3 keep working.

  9. Unused USB commands deleted. Nothing calls get-asset, upload-asset or asset-op (searched the SPA, cloud-frontend, backend, e2e and docs), so they're gone, saving 1,312 B measured on S3.

Size: the S3 8 MB app is 3,119,952 B, against 3,119,824 B on main: +128 B for the batch.

Checks

  • Docker ci_build_image.sh: esp32-s3 and esp32-c3 both build with -Werror.
  • Host tests: json_guard, upload_limits, assets_path, url_guard, minisig, config_parse, schedule_catchup, cloud_contract, console_line, wake. All pass.
  • Backend: test_esp32_*.py + test_embedded_firmware.py, 115 passed.

Bench

  • Hotspot setup still works without a login when the station side is on a 192.168.4.x LAN.
  • An E1004 with wake_schedule on and a time zone set wakes on local boundaries.
  • A cloud firmware update sent while a backend OTA runs waits, then continues or logs skipped.
  • set assets_path and the setup page refuse bad mount points.
  • Asset verbs still work with the queue in PSRAM.

🤖 Generated with Claude Code

@mariusandra @claude
ESP32 lows: hotspot by interface, setup validation, one OTA at a time…
986055b 
…, WPA2 floor

The nine "ESP32 — low" items of docs/embedded-todo.md:

- The hotspot check decides by the address the connection arrived on
  (fos_wifi_addr_is_portal_ap), not the peer's range, so a home LAN on
  192.168.4.0/24 no longer counts as the hotspot.
- /api/setup and the console share the panel check
  (fos_display_panel_known) and a mount-point rule
  (fos_assets_mount_point_valid, host-tested); neither checked assets_path
  before. An unchanged legacy value still saves.
- Cloud and backend OTA take one lock; the cloud task waits up to 15 min,
  then logs `ota:cloud skipped another-ota-running`.
- An over-long console line is refused once and dropped to its newline
  (fos_console_line.h, host-tested, in the e2e-docker host-test step).
- The asset job queue's storage comes from PSRAM (internal on the C3).
- wake_schedule aligns to local time from the same offset the schedule
  uses (fos_wake_aligned_sleep_seconds, host-tested across Brussels DST).
- The status JSON drops the retired OTA fields; nothing reads them.
- Wi-Fi joins WPA2-PSK and up only. WPA1-only (TKIP) networks stop
  connecting; mixed WPA/WPA2 and WPA3 keep working.
- The unused usb_api get-asset / upload-asset / asset-op go (-1,312 B).

S3 8 MB app: +128 bytes for the batch.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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ESP32 firmware size

Built from da5fc6a by this run; compared with the latest release v2026.10.16.

Image This PR v2026.10.16 Δ
esp32-s3 app (OTA image) 3,119,952
86.6% of 3520K slot, 473 KB free		 3,119,504 +448 (+0.0%)
esp32-s3 merged flash image 3,185,488 3,185,040 +448 (+0.0%)
esp32-s3-32mb app (OTA image) 3,119,952
75.6% of 4032K slot, 985 KB free		 3,119,488 +464 (+0.0%)
esp32-s3-32mb merged flash image 3,251,024 3,250,560 +464 (+0.0%)

Breakdown by subsystem — esp32-s3

Subsystem This PR v2026.10.16 Δ
FrameOS core (Nim) 476,051 475,930 +121 (+0.0%)
QuickJS 360,285 360,285 ±0
pixie 296,919 296,959 -40 (-0.0%)
Wi-Fi stack 295,296 295,296 ±0
Nim stdlib 247,632 247,612 +20 (+0.0%)
ESP-IDF misc 181,413 181,343 +70 (+0.0%)
FrameOS apps (Nim) 181,348 181,348 ±0
Embedded font 146,358 146,358 ±0
fos_* firmware shell (C) 136,750 136,501 +249 (+0.2%)
String pool (attributed to efuse) 136,684 136,729 -45 (-0.0%)
mbedTLS + certificates 132,427 132,427 ±0
lwIP / HTTP / WebSocket 126,935 126,939 -4 (-0.0%)
libc / libm / newlib 116,263 116,263 ±0
Storage (SPIFFS / FatFS / SD / NVS) 94,068 94,068 ±0
Nim packages (chrono, zippy, chroma, qrgen, ...) 70,320 70,320 ±0
Display drivers (C) 65,029 64,962 +67 (+0.1%)
Crypto (monocypher) 35,141 35,141 ±0
Total mapped flash 3,098,919 3,098,481 +438 (+0.0%)
Inside each subsystem

FrameOS core (Nim) — 476,051

Part This PR v2026.10.16 Δ
frameos/js_runtime 115,656 115,612 +44 (+0.0%)
frameos/utils 110,853 110,853 ±0
frameos/interpreter.nim 100,679 100,659 +20 (+0.0%)
embedded_main.nim 19,120 19,120 ±0
embedded_runtime.nim 17,593 17,593 ±0
lib/tz.nim 16,589 16,589 ±0
frameos_nim_glue.c.obj 11,427 11,455 -28 (-0.2%)
frameos/planner.nim 9,574 9,574 ±0
frameos/event_loop.nim 8,143 8,143 ±0
frameos/types.nim 7,715 7,715 ±0
frameos/values.nim 7,528 7,528 ±0
frameos/apps.nim 6,431 6,431 ±0
frameos/single_scene_host.nim 6,379 6,379 ±0
frameos/spool.nim 5,560 5,560 ±0
frameos/input_state.nim 4,676 4,676 ±0
embedded_scene.nim 4,654 4,654 ±0
frameos/events_gen.nim 3,967 3,967 ±0
fos_netguard.c.obj 3,532 3,532 ±0
frameos/app_config.nim 2,734 2,734 ±0
frameos/node_config.nim 2,582 2,582 ±0
frameos/app_capabilities.nim 2,473 2,473 ±0
frameos/events.nim 2,335 2,335 ±0
frameos/reboot_reason.nim 2,332 2,332 ±0
frameos/refresh_interval.nim 1,593 1,593 ±0
frameos/runtime_diagnostics.nim 775 775 ±0
fos_version.c.obj 413 328 +85 (+25.9%)
frameos/event_log.nim 407 407 ±0
frameos/channels.nim 153 153 ±0
frameos/ids.nim 120 120 ±0
frameos/hal 44 44 ±0
frameos/retired_apps.nim 14 14 ±0

QuickJS — 360,285

Part This PR v2026.10.16 Δ
quickjs.c.obj 287,746 287,746 ±0
libunicode.c.obj 50,178 50,178 ±0
libregexp.c.obj 14,007 14,007 ±0
dtoa.c.obj 5,689 5,689 ±0
cutils.c.obj 2,141 2,141 ±0
fos_qjs_glue.c.obj 449 449 ±0
fos_quickjs_tz.c.obj 75 75 ±0

pixie — 296,919

Part This PR v2026.10.16 Δ
pixie/fontformats/opentype.nim 56,062 56,066 -4 (-0.0%)
pixie/fileformats/webp.nim 36,937 36,937 ±0
pixie/fileformats/svg.nim 35,546 35,546 ±0
pixie/paths.nim 31,592 31,616 -24 (-0.1%)
pixie/fileformats/jpeg.nim 29,160 29,164 -4 (-0.0%)
pixie/fileformats/png.nim 21,475 21,475 ±0
pixie/images.nim 15,445 15,445 ±0
pixie/fonts.nim 10,301 10,301 ±0
pixie/paints.nim 9,019 9,023 -4 (-0.0%)
pixie/fileformats/bmp.nim 7,612 7,612 ±0
pixie/common.nim 7,154 7,158 -4 (-0.1%)
pixie/blends.nim 6,622 6,622 ±0
pixie/fileformats/gif.nim 5,737 5,737 ±0
pixie.nim 5,243 5,243 ±0
pixie/inflatestream.nim 5,164 5,156 +8 (+0.2%)
pixie/fileformats/webp_vp8_tables.nim 3,881 3,881 ±0
pixie/fileformats/ppm.nim 3,520 3,520 ±0
pixie/contexts.nim 2,951 2,951 ±0
pixie/fileformats/qoi.nim 2,437 2,437 ±0
pixie/internal.nim 506 502 +4 (+0.8%)
pixie/rgb565.nim 315 327 -12 (-3.7%)
pixie/fontformats/svgfont.nim 190 190 ±0
pixie/decodebudget.nim 50 50 ±0

Wi-Fi stack — 295,296

Part This PR v2026.10.16 Δ
libnet80211.a 136,148 136,148 ±0
libpp.a 62,158 62,158 ±0
libwpa_supplicant.a 54,904 54,904 ±0
libphy.a 34,176 34,176 ±0
libesp_wifi.a 4,788 4,788 ±0
libesp_phy.a 2,541 2,541 ±0
libesp_coex.a 291 291 ±0
libcore.a 287 287 ±0
libespnow.a 3 3 ±0

Nim stdlib — 247,632

Part This PR v2026.10.16 Δ
pure/collections/tables.nim 72,122 72,114 +8 (+0.0%)
system.nim 48,179 48,163 +16 (+0.0%)
pure/unicode.nim 17,324 17,324 ±0
pure/times.nim 16,493 16,493 ±0
pure/json.nim 13,478 13,478 ±0
std/private/dragonbox.nim 10,348 10,348 ±0
pure/strutils.nim 7,847 7,847 ±0
pure/parsexml.nim 5,802 5,802 ±0
pure/algorithm.nim 5,324 5,324 ±0
pure/base64.nim 5,107 5,107 ±0
pure/hashes.nim 4,003 4,003 ±0
std/formatfloat.nim 3,476 3,476 ±0
pure/xmlparser.nim 3,407 3,407 ±0
pure/parsejson.nim 3,392 3,392 ±0
pure/uri.nim 2,988 2,988 ±0
pure/streams.nim 2,749 2,749 ±0
pure/strformat.nim 2,380 2,380 ±0
std/syncio.nim 2,282 2,282 ±0
pure/collections/sets.nim 2,089 2,089 ±0
pure/xmltree.nim 1,862 1,862 ±0
pure/lexbase.nim 1,775 1,775 ±0
pure/parseutils.nim 1,741 1,741 ±0
system/exceptions.nim 1,530 1,530 ±0
pure/strtabs.nim 1,507 1,507 ±0
pure/pathnorm.nim 1,212 1,212 ±0
pure/collections/lists.nim 990 990 ±0
std/private/ospaths2.nim 966 966 ±0
pure/collections/deques.nim 844 844 ±0
pure/math.nim 839 839 ±0
pure/options.nim 815 815 ±0
pure/random.nim 688 688 ±0
std/private/digitsutils.nim 617 617 ±0
std/private/osdirs.nim 510 510 ±0
std/oserrors.nim 489 489 ±0
std/monotimes.nim 485 485 ±0
system/dollars.nim 431 431 ±0
std/private/oscommon.nim 325 325 ±0
std/envvars.nim 306 310 -4 (-1.3%)
std/private/ossymlinks.nim 187 187 ±0
std/private/decode_helpers.nim 181 181 ±0
pure/bitops.nim 162 162 ±0
pure/os.nim 99 99 ±0
std/private/osfiles.nim 96 96 ±0
core/macros.nim 89 89 ±0
std/assertions.nim 87 87 ±0
system/ctypes.nim 9 9 ±0

ESP-IDF misc — 181,413

Part This PR v2026.10.16 Δ
libesp_hw_support.a 37,620 37,620 ±0
libhal.a 21,865 21,865 ±0
libfreertos.a 17,240 17,240 ±0
libesp_system.a 13,736 13,736 ±0
libesp_driver_uart.a 11,627 11,627 ±0
libheap.a 8,660 8,660 ±0
libesp_driver_i2c.a 8,062 8,062 ±0
libesp_driver_spi.a 7,760 7,760 ±0
libconsole.a 5,733 5,733 ±0
libjson.a 4,940 4,940 ±0
libesp_driver_gpio.a 3,878 3,878 ±0
libbootloader_support.a 3,813 3,813 ±0
libxtensa.a 3,691 3,691 ±0
libesp_driver_usb_serial_jtag.a 3,408 3,408 ±0
libesp_ringbuf.a 3,322 3,322 ±0
libesp_event.a 3,241 3,241 ±0
libesp_driver_ledc.a 3,054 3,054 ±0
libapp_update.a 2,484 2,414 +70 (+2.9%)
libesp_mm.a 2,451 2,451 ±0
libesp_timer.a 2,337 2,337 ±0
libsoc.a 2,316 2,316 ±0
libesp_adc.a 2,285 2,285 ±0
libesp_psram.a 2,172 2,172 ±0
libpthread.a 1,397 1,397 ±0
liblog.a 1,375 1,375 ±0
libesp_security.a 1,050 1,050 ±0
libesp_rom.a 902 902 ±0
libesp_app_format.a 507 507 ±0
libxt_hal.a 437 437 ±0
libesp_common.a 26 26 ±0
libesp_pm.a 24 24 ±0

FrameOS apps (Nim) — 181,348

Part This PR v2026.10.16 Δ
apps/data/icalJson 50,262 50,262 ±0
apps/render/calendar 29,944 29,944 ±0
apps/data/localImage 10,340 10,340 ±0
apps/render/split 9,389 9,389 ±0
apps/data/eventsToAgenda 8,568 8,568 ±0
apps/render/zoomPan 8,360 8,360 ±0
apps/apps.nim 7,208 7,208 ±0
apps/render/text 5,234 5,234 ±0
apps/data/xmlToJson 5,190 5,190 ±0
apps/render/svg 4,583 4,583 ±0
apps/render/image 4,423 4,423 ±0
apps/logic/setAsState 3,181 3,181 ±0
apps/data/downloadImage 3,128 3,128 ±0
apps/data/qr 3,017 3,017 ±0
apps/render/gradient 2,983 2,983 ±0
apps/data/rotateImage 2,939 2,939 ±0
apps/data/downloadUrl 2,774 2,774 ±0
apps/data/resizeImage 2,312 2,312 ±0
apps/data/newImage 2,175 2,175 ±0
apps/render/color 2,059 2,059 ±0
apps/render/opacity 2,055 2,055 ±0
apps/data/log 2,053 2,053 ±0
apps/data/prettyJson 1,947 1,947 ±0
apps/data/clock 1,718 1,718 ±0
apps/data/parseJson 1,585 1,585 ±0
apps/logic/nextSleepDuration 1,394 1,394 ±0
apps/logic/ifElse 1,311 1,311 ±0
apps/logic/breakIfRendering 1,216 1,216 ±0

Embedded font — 146,358

Part This PR v2026.10.16 Δ
assets/fonts.nim 146,358 146,358 ±0

fos_ firmware shell (C)* — 136,750

Part This PR v2026.10.16 Δ
fos_http.c.obj 22,252 22,185 +67 (+0.3%)
fos_cloud.c.obj 19,672 19,651 +21 (+0.1%)
fos_console.c.obj 13,061 14,001 -940 (-6.7%)
fos_client.c.obj 12,975 12,957 +18 (+0.1%)
fos_settings.c.obj 7,722 7,722 ±0
fos_scenes.c.obj 7,515 7,515 ±0
fos_ota.c.obj 5,902 5,639 +263 (+4.7%)
fos_cloud_contract.c.obj 4,768 4,768 ±0
fos_config.c.obj 4,619 4,619 ±0
fos_wifi.c.obj 3,295 3,189 +106 (+3.3%)
fos_assets.c.obj 3,124 3,124 ±0
fos_sd_probe.c.obj 2,753 2,753 ±0
fos_buttons.c.obj 2,737 2,737 ±0
fos_schedule.c.obj 2,624 2,614 +10 (+0.4%)
fos_assets_sd.c.obj 2,484 2,484 ±0
fos_events.c.obj 2,332 2,332 ±0
fos_panel_draw.c.obj 2,229 2,229 ±0
main.c.obj 1,703 1,703 ±0
fos_config_parse.c.obj 1,467 1,467 ±0
fos_url_guard.c.obj 1,397 1,397 ±0
fos_tz.c.obj 1,294 1,294 ±0
fos_buzzer.c.obj 1,162 1,162 ±0
fos_battery.c.obj 1,140 1,140 ±0
fos_minisig.c.obj 1,140 1,140 ±0
fos_backend_http.c.obj 1,072 1,072 ±0
fos_commands.c.obj 940 940 ±0
fos_status_screen.c.obj 893 893 ±0
fos_lan_access.c.obj 841 841 ±0
fos_scene_state.c.obj 650 650 ±0
fos_wake.c.obj 598 199 +399 (+200.5%)
fos_assets_path.c.obj 564 259 +305 (+117.8%)
fos_framebuffer.c.obj 483 483 ±0
fos_button_timing.c.obj 434 434 ±0
fos_board.c.obj 334 334 ±0
fos_power.c.obj 241 241 ±0
fos_battery_filter.c.obj 214 214 ±0
fos_json_guard.c.obj 119 119 ±0

String pool (attributed to efuse) — 136,684

Part This PR v2026.10.16 Δ
esp_efuse_utility.c.obj 135,638 135,683 -45 (-0.0%)
esp_efuse_rtc_calib.c.obj 566 566 ±0
esp_efuse_table.c.obj 268 268 ±0
esp_efuse_api.c.obj 151 151 ±0
esp_efuse_startup.c.obj 61 61 ±0

mbedTLS + certificates — 132,427

Part This PR v2026.10.16 Δ
libmbedcrypto.a 71,291 71,291 ±0
libmbedtls.a 45,799 45,799 ±0
libmbedx509.a 7,080 7,080 ±0
libesp-tls.a 6,705 6,705 ±0
libesp_https_server.a 1,552 1,552 ±0

lwIP / HTTP / WebSocket — 126,935

Part This PR v2026.10.16 Δ
liblwip.a 78,525 78,529 -4 (-0.0%)
libhttp_parser.a 10,350 10,350 ±0
libesp_http_server.a 10,020 10,020 ±0
libtcp_transport.a 8,245 8,245 ±0
libespressif__esp_websocket_client.a 6,822 6,822 ±0
libesp_http_client.a 6,666 6,666 ±0
libesp_netif.a 6,307 6,307 ±0

libc / libm / newlib — 116,263

Part This PR v2026.10.16 Δ
libc.a 76,471 76,471 ±0
libm.a 31,563 31,563 ±0
libnewlib.a 6,609 6,609 ±0
libstdc++.a 1,476 1,476 ±0
libgcc.a 98 98 ±0
libcxx.a 46 46 ±0

Storage (SPIFFS / FatFS / SD / NVS) — 94,068

Part This PR v2026.10.16 Δ
libspiffs.a 20,380 20,380 ±0
libfatfs.a 20,141 20,141 ±0
libspi_flash.a 14,168 14,168 ±0
libnvs_flash.a 13,665 13,665 ±0
libsdmmc.a 13,013 13,013 ±0
libvfs.a 6,196 6,196 ±0
libesp_driver_sdspi.a 3,866 3,866 ±0
libesp_partition.a 1,956 1,956 ±0
libesp_vfs_console.a 678 678 ±0
libnvs_sec_provider.a 5 5 ±0

Nim packages (chrono, zippy, chroma, qrgen, ...) — 70,320

Part This PR v2026.10.16 Δ
QRgen 3.1.0 21,886 21,886 ±0
chrono 0.3.1 15,025 15,049 -24 (-0.2%)
zippy 0.10.19 14,936 14,936 ±0
chroma 1.0.0 14,388 14,368 +20 (+0.1%)
checksums 0.2.1 3,290 3,290 ±0
flatty 0.3.4 530 530 ±0
jsony 1.1.5 148 148 ±0
bumpy 1.1.3 117 113 +4 (+3.5%)

Display drivers (C) — 65,029

Part This PR v2026.10.16 Δ
(everything else) 21,278 21,278 ±0
frameos_panel_table.c.obj 6,685 6,685 ±0
EPD_13in3e.c.obj 1,796 1,796 ±0
EPD_3in7.c.obj 1,564 1,564 ±0
EPD_5in79.c.obj 1,481 1,481 ±0
DEV_Debug.c.obj 1,313 1,313 ±0
EPD_2in7.c.obj 1,292 1,292 ±0
EPD_4in2.c.obj 1,262 1,262 ±0
EPD_7in3e.c.obj 1,208 1,208 ±0
EPD_4in2_V2.c.obj 1,184 1,184 ±0
DEV_Config_esp.c.obj 1,180 1,180 ±0
EPD_4in26.c.obj 1,123 1,123 ±0
29 smaller rows 23,663 23,596 +67 (+0.3%)

Crypto (monocypher) — 35,141

Part This PR v2026.10.16 Δ
monocypher.c.obj 31,916 31,916 ±0
monocypher-ed25519.c.obj 3,225 3,225 ±0
Biggest movers (per object)
Object Δ This PR Baseline
fos_console.c.obj -940 13,061 14,001
fos_ota.c.obj +263 5,902 5,639
fos_http.c.obj +67 22,252 22,185
esp_efuse_utility.c.obj -45 135,638 135,683
frameos/js_runtime/app_runtime.nim +28 72,810 72,782
frameos_nim_glue.c.obj -28 11,427 11,455
pkgs/pixie-6.1.0/pixie/paths.nim -24 31,592 31,616
pkgs/chrono-0.3.1/chrono.nim -24 15,025 15,049
fos_cloud.c.obj +21 19,672 19,651
frameos/interpreter.nim +20 100,679 100,659
fos_client.c.obj +18 12,975 12,957
pkgs/chroma-1.0.0/chroma.nim +16 4,834 4,818
nim/lib/system.nim +16 48,179 48,163
pkgs/pixie-6.1.0/pixie/inflatestream.nim +8 5,164 5,156
nim/lib/pure/collections/tables.nim +8 72,122 72,114
Largest 30 objects
Object Subsystem This PR v2026.10.16 Δ
quickjs.c.obj QuickJS 287,746 287,746 ±0
assets/fonts.nim Embedded font 146,358 146,358 ±0
esp_efuse_utility.c.obj String pool (attributed to efuse) 135,638 135,683 -45 (-0.0%)
frameos/interpreter.nim FrameOS core (Nim) 100,679 100,659 +20 (+0.0%)
frameos/js_runtime/app_runtime.nim FrameOS core (Nim) 72,810 72,782 +28 (+0.0%)
nim/lib/pure/collections/tables.nim Nim stdlib 72,122 72,114 +8 (+0.0%)
pkgs/pixie-6.1.0/pixie/fontformats/opentype.nim pixie 56,062 56,066 -4 (-0.0%)
libunicode.c.obj QuickJS 50,178 50,178 ±0
nim/lib/system.nim Nim stdlib 48,179 48,163 +16 (+0.0%)
apps/data/icalJson/ical.nim FrameOS apps (Nim) 44,746 44,746 ±0
pkgs/pixie-6.1.0/pixie/fileformats/webp.nim pixie 36,937 36,937 ±0
pkgs/pixie-6.1.0/pixie/fileformats/svg.nim pixie 35,546 35,546 ±0
frameos/utils/image.nim FrameOS core (Nim) 35,259 35,259 ±0
monocypher.c.obj Crypto (monocypher) 31,916 31,916 ±0
pkgs/pixie-6.1.0/pixie/paths.nim pixie 31,592 31,616 -24 (-0.1%)
frameos/js_runtime/runtime.nim FrameOS core (Nim) 31,338 31,330 +8 (+0.0%)
pkgs/pixie-6.1.0/pixie/fileformats/jpeg.nim pixie 29,160 29,164 -4 (-0.0%)
apps/render/calendar/app.nim FrameOS apps (Nim) 22,841 22,841 ±0
fos_http.c.obj fos_* firmware shell (C) 22,252 22,185 +67 (+0.3%)
pkgs/pixie-6.1.0/pixie/fileformats/png.nim pixie 21,475 21,475 ±0
fos_cloud.c.obj fos_* firmware shell (C) 19,672 19,651 +21 (+0.1%)
embedded_main.nim FrameOS core (Nim) 19,120 19,120 ±0
x509_crt_bundle.S.obj mbedTLS + certificates 17,928 17,928 ±0
embedded_runtime.nim FrameOS core (Nim) 17,593 17,593 ±0
nim/lib/pure/unicode.nim Nim stdlib 17,324 17,324 ±0
frameos/utils/asset_colors.nim FrameOS core (Nim) 17,028 17,028 ±0
lib/tz.nim FrameOS core (Nim) 16,589 16,589 ±0
frameos/utils/status_screen.nim FrameOS core (Nim) 16,551 16,551 ±0
nim/lib/pure/times.nim Nim stdlib 16,493 16,493 ±0
ieee80211_ioctl.o Wi-Fi stack 15,592 15,592 ±0

Flash = .text + .rodata from the linker map via esp_idf_size; "Inside each subsystem" splits every bucket one level down (the Nim core by directory, apps by app, packages by package, ESP-IDF by archive) over all objects, not just the largest. "String pool (attributed to efuse)" is the linker's merged string-literal pool for the whole image, not efuse code — see docs/esp32-image-size.md.

@mariusandra
mariusandra merged commit 523bf3d into main Oct 18, 2026
23 checks passed
@mariusandra
mariusandra deleted the lows-esp32 branch October 18, 2026 18:55
@mariusandra mariusandra mentioned this pull request Oct 18, 2026
Merged
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