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deserializeConfig() cleared linked_remotes before checking whether the posted document carries nw.linked_remote at all, so any /json/cfg write without an nw block (for example a maxpwr-only POST from a configurator) emptied the paired remotes and saved the empty list. Every other list in this function clears only inside its presence check; this moves the clear inside the guard as well. An explicit "linked_remote": [] still empties the list, so the settings page's unpair path is unchanged. Fixes wled#5883
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Included review availability: This review used your included allowance. Your plan provides up to 10 included reviews per hour; 9 remain after this review. WalkthroughThe configuration parser preserves linked remotes when ChangesPartial configuration updates
Priority: ➖ Normal Estimated code review effort: 2 (Simple) | ~10 minutes Change: Bug fix · Severity of issue fixed: Medium Merge Risk: ⚪ Minimal · up to The described partial configuration updates preserve omitted settings. No actionable merge-blocking risk is established; the change is mergeable after normal checks. Architecture SummaryArchitecture risk: 🔵 Low · up to The change affects 1 system. Changed systems: Architecture concerns Review detailsSystems and components
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softhack007
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@Tycorc did you also test that the webUI works as before? I.e. use the WiFi & network setting page to add/remove remotes? |
Side note: "under my supervision" is a common weasel word for "i don't know anything about this myself". We've heared these reassurance statements just too often 😆 since AI came up. Sorry nothing to do with your contribution. If you confirm that the WebUI (Wi-Fi settings page) works for you as before, that would be the reassurance i'm looking for. |
Well that, i did not confirm, kinda captain obvious for me. Wifi settings is handled in different function/ or rather never enters this. so there can not be an impact at all, so no need to test. set.cpp handleSettingsSet() rebuilds linked_remotes from RM0..RM9 itself. My goal is to avoid the web Frontend as far as possible. That is why the part json config post are of interest to me. Homeassistant dashboard one click party mode music sync of speaker audio output of wled, hue, led lighting of Tower Hardware, govee ( but plan to drop govee and replace with wled controller). https://tycstation.com check it out if u are interested. Mainly Homelab Build, but working on adding more Smart home adventures. Currently i digged deeper into the codebase. Brightness Gama gets resetted to 1 on partial posts, #5225 fixed the colour half but not brigthness, that one is broken since 0.14 so over 3 years. FPS same thing, hw.led.fps goes back to 42, came with 7e490fc for #5408 so new in 16, wasn't there in 15. rgbwm resets to disabled and a disabled gc.col turns itself on again. all same function, they fall back to a constant instead of the current value like CJSON does everywhere else. confirmed on my 8266 with 16.0.1 and main. fix is 4 lines, fallback = current value, fresh install still gets the defaults cause thats what the current values are at boot. tested on the 8266, builds esp32dev + nodemcuv2. @softhack007 please advise open seperate issue + Pull request or increase scope of this one? |
deserializeConfig() read hw.led.rgbwm, hw.led.fps, light.gc.bri and light.gc.col with a constant as fallback, so a /json/cfg POST without these keys reset them to the defaults and persisted that. Fall back to the current value instead, as the rest of the function does. A fresh boot still gets the defaults because the current values are the compiled ones at that point.
Tycorc
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Review comments at @wled00/cfg.cpp:
- Around line 531-532: Update the gamma configuration handling around
`light_gc_bri` and `light_gc_col` so `gammaCorrectBri` and `gammaCorrectCol`
change only when their matching `gc.bri` or `gc.col` field is present. Preserve
each existing flag when its field is omitted, while retaining the current
value-parsing behavior for supplied fields.
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Replaces the fallback from the previous commit. 0.13 left gammaCorrectBri and gammaCorrectCol alone when the key was missing (cfg.cpp L238 in v0.13.3: > 1.5 on, > 0.5 off, else untouched), 0.14 turned the else into "= false", which is where the reset on a partial /json/cfg POST came from. Skipping the assignment when the key is absent restores that and also keeps a flag that was set with gammaCorrectVal == 1.0, which the fallback dropped. A fresh install is unchanged: the compiled defaults are colour on, brightness off, 2.2.
| else gammaCorrectBri = false; | ||
| if (light_gc_col != 1.0f) gammaCorrectCol = true; | ||
| else gammaCorrectCol = false; | ||
| JsonVariant gc_bri = light["gc"]["bri"]; // 1.0 = off, absent = keep current |
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I'd done it this way, to future-proof it if Bri and Col ever change to bool.
JsonVariant light_gc_bri = light["gc"]["bri"];
JsonVariant light_gc_col = light["gc"]["col"];
if (gammaCorrectVal > 1.0f && gammaCorrectVal <= 3.0f) {
if (!light_gc_bri.isNull()) gammaCorrectBri = ((light_gc_bri.is<float>() && light_gc_bri.as<float>() > 1.0f) || (light_gc_bri.is<bool>() && light_gc_bri.as<bool>()));
if (!light_gc_col.isNull()) gammaCorrectCol = ((light_gc_col.is<float>() && light_gc_col.as<float>() > 1.0f) || (light_gc_col.is<bool>() && light_gc_col.as<bool>()));
} else {
gammaCorrectBri = false;
gammaCorrectCol = false;
gammaCorrectVal = 1.0f;
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FYI 0.14.0 introduced custom gamma, prior to that it was fixed to 2.8.
gammaCorrectBri or gammaCorrectCol always used either 2.8 or 1.0 prior to custom gamma.
It would be safe to convert them to boolean (breaking downgrade compatibility) since 0.14 is already 3 years old.
Backport the cfg.cpp changes reviewed from WLED PR 5885, preserving paired remotes, target FPS, global auto-white mode and gamma flags when omitted. Add extracted-production tests using bundled ArduinoJson; all 15 checks pass, with eight reproduced failures against the original code. Source: wled#5885 Original commits: 6bdea2d, adffde4, ebc654f Co-authored-by: Tycho Schottdorf <T.Schottdorf@gmail.com>
3 participants
Fixes #5883.
Goal: a
POST /json/cfgwithoutnw.linked_remote(for example a payload that only setshw.led.maxpwr) should keep the paired ESP-NOW remotes. Today it empties the list and writes the empty list tocfg.json, so the remote stops working until it is paired again.Change: in
deserializeConfig()thelinked_remotes.clear()ran before the check whethernw.linked_remoteis present in the posted JSON. This moves that one line inside theif (!lrem.isNull())guard, like the other lists in that function (nw.ins, buttons, timers). An explicit"linked_remote": []still clears the list, so unpairing from the WiFi settings page is unchanged. The unconditional clear came in with #4654; before thatgetStringFromJson()left the remote alone when the key was absent. If the clear has to stay unconditional for a reason, please tell me, i couldn't find one.Testing: confirmed on hardware, ESP32 (
esp32dev) and ESP8266 (nodemcuv2). Both boards ran WLED v16.0.1 with this patch cherry-picked on top (the touched lines are identical onmain); the ESP8266 afterwards ran this branch itself,mainplus the patch, with the same result.Stock v16.0.1 on both boards, and stock
mainon the ESP8266: pair a WiZmote,POST /json/cfg {"hw":{"led":{"maxpwr":6000}}}, thenlinked_remoteis[]in/json/cfgand/cfg.jsonand remote presses are ignored.With the patch, on both boards: the remote stays paired through that POST, through
{"nw":{"espnow":true}}and through a reboot;"linked_remote": []still clears; the legacy single-string form still works; the remote buttons work after each step. Same result with two WiZmotes paired at once: both MACs stay listed after themaxpwrPOST and both remotes switch the strip, so the multi-remote support from #4654 is unaffected.AI assistance: yes
What the AI drafted: the commit message and this description. It also ran the builds, the OTA flashes and the curl calls under my supervision.
What I verified/tested myself: read the diff, verified the before/after behaviour on both boards with the remote in hand, read the cfg output after each step and also this PR.
Untested / unsure about: nothing I know of.
No
// AI:markers in the source: the diff moves one existing line and adds no new code.Greetings
Tycho
Update 2026-10-04, scope increased after Aircoookie's ok in #5883. Second commit adds 4 more settings from the same function that reset on a partial POST, different cause: they fall back to a constant when the key is missing instead of the current value like
CJSON()does for the rest of the function.Fresh install still gets the same defaults,
deserializeConfigFromFS()runs this function on an empty document when there is no cfg.json and the current values are the compiled ones at that point. The constants came with #5225 (gamma, for #5224) and 7e490fc (fps, for #5408), Brightness Gamma itself resets since 0.14 and #5225 fixed only the colour half. Explicit values unchanged,"fps":0and"rgbwm":0still work.Testing: ESP8266 (
nodemcuv2) onmain1252853. Stock: set fps 30, rgbwm 1, Brightness Gamma 2.8, colour Gamma off,POST /json/cfg {"hw":{"led":{"maxpwr":6000}}}, result fps 42, rgbwm disabled, Brightness Gamma off, colour Gamma on, in/json/cfgand/cfg.json. With the commit: all 4 keep their values through that POST and a reboot,"fps":0and"rgbwm":0set explicitly survive another partial POST. Buildsesp32devandnodemcuv2.AI drafted the 4 lines, the commit message and this update. I read the diff and the fresh install code path and did the before/after on the 8266 myself. No
// AI:markers, 4 expressions changed, no new block.Update 2026-10-07: third commit replaces the gamma fallback with a presence check, as posted in #5883:
gammaCorrectBri/gammaCorrectColchange only whengc.bri/gc.colare in the document, which also closes the CodeRabbit corner (flag set whilegc.valis 1.0). Buildsesp32devandnodemcuv2. AI-assisted build and commit, diff read by me; not re-tested on hardware.Summary by CodeRabbit