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Mesh improvements, launcher sorting and WiFi buffers increased - #727
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Review comments at @Modules/mesh-module/source/mesh_service.cpp:
- Line 1683: **Validate `spreading_factor` in `mesh_set_radio_settings`.**
The setter checks bandwidth, band fit, and power, but not `spreading_factor`. A
nonzero out-of-range value is saved. `applyProfile` then sends it to the SX1262
driver, which rejects values outside 7 to 12. Configuration fails, and the mesh
enters `MESH_STATE_ERROR` until the stored value is corrected. Reject
unsupported spreading factors in the setter.
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Modules/mesh-module/source/mesh_service.cpp
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Walkthrough
The mesh API and service now manage presets, radio settings, and network settings per backend. MeshCore adds regional profiles, scoped flood transport, and safer channel-file handling. Meshtastic adds modem presets and preset-linked primary channel names. The settings interface and channel flows reflect these changes. Launcher sorting now ignores case, and the SPIRAM device configuration sets a Wi-Fi dynamic RX buffer count.
Priority: Normal
Merge Risk: Moderate · up to ad62d
Reject unsupported spreading-factor overrides before merging: a saved invalid value can disable mesh operation until corrected. Previously reported configuration, migration, and channel-compatibility concerns also remain outstanding.
Pre-merge checks: 4 · 1
Failed checks: 1 warning
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Docstring coverage is 27.78% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documenta…
Write docstrings for the functions missing them to satisfy the coverage threshold.
Passed checks: 4 passed
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Title check
The title accurately identifies the main mesh changes and the additional launcher sorting and WiFi buffer updates.
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Full details: Docstring Coverage
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Docstring coverage is 27.78% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentation-only edits and deletions within surviving functions are included; unchanged diff context and fully deleted functions are excluded. Analyzed 72 functions across 22 files.
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Write docstrings for the functions missing them to satisfy the coverage threshold.
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Actionable comments posted: 12
Note
Follow-up findings are listed below so you can review them separately from inline comments.
Follow-ups (4)
🟡 Minor (4)
Minor · Use tt::std::vector for the retained radio setting values. · MeshSettings.cpp:79-80
Tactility/Source/app/meshsettings/MeshSettings.cpp:79-80 📐 Maintainability & Code Quality | 🟡 Minor | 💤 Low value
Use tt::std::vector for the retained radio setting values.
radioSettingValues is a std::vector in Context, which lives for the whole app session. As per coding guidelines, "Containers that live long use the tt::std replacements from TactilityKernel: tt::std::vector, tt::std::deque, tt::std::map and tt::std::string... They prefer external RAM." The file already uses std::vector for its other Context containers, so this change repeats an existing deviation. Switching the type needs an API check first.
Minor · Do not label every ERROR on a LoRa-backed radio as a region problem. · MeshSettings.cpp:145-147
Do not label every ERROR on a LoRa-backed radio as a region problem.
getStatus() now returns "Settings not allowed in " for every MESH_STATE_ERROR when lora is true. The mesh_service.cpp source sets MESH_STATE_ERROR for backend creation failure (line 686), for a region or preset rejection (line 695), for a failed profile apply (line 705), and when the radio reports an error in tick() (line 921). Only the line 695 case matches the region text. Show a region-specific state for that case, or keep the generic error text for the others.
Minor · Stop preset selection when saving the required region fails. · MeshSettings.cpp:586-589
Stop preset selection when saving the required region fails.
When settings::radio::saveRegion() returns false, onPresetSelected() still calls mesh_set_preset(). The preset needs the other region, so the radio rejects its frequency and the mesh stays in MESH_STATE_ERROR. Return before selecting the preset, and log the failure.
🐛 Suggested fix
if (mesh_get_preset_region(ctx->presetBackend, name, ®ion) == ERROR_NONE && region != RADIO_REGION_UNSET && region != settings::radio::loadRegion()) {
- settings::radio::saveRegion(region);+ if (!settings::radio::saveRegion(region)) {+ LOG_E(TAG, "Failed to save the region for the selected preset");+ return;+ }
}
Minor · Reject unsupported Default regions before saving the preset. · meshcore_backend.cpp:458-459
Reject unsupported Default regions before saving the preset.
getPresetRegion returns success for PRESET_DEFAULT without checking the default profile table. onPresetSelected then calls mesh_set_preset even when mesh_get_preset_region fails. Since mesh_set_preset persists the selection, update both the callback and its caller.
This failure predates the PR.
Suggested fix
- if (mesh_get_preset_region(ctx->presetBackend, name, ®ion) == ERROR_NONE && region != RADIO_REGION_UNSET && region != settings::radio::loadRegion()) {+ if (mesh_get_preset_region(ctx->presetBackend, name, ®ion) != ERROR_NONE) {+ return;+ }+ if (region != RADIO_REGION_UNSET && region != settings::radio::loadRegion()) {
settings::radio::saveRegion(region);
}
mesh_set_preset(ctx->presetBackend, name);
*region = current;
- if (preset == PRESET_DEFAULT || preset > PROFILES.size()) {+ if (preset == PRESET_DEFAULT) {+ const auto* match = std::find_if(DEFAULT_PROFILES.begin(), DEFAULT_PROFILES.end(), [current](const DefaultProfile& profile) {+ return profile.region == current;+ });+ return match == DEFAULT_PROFILES.end() ? ERROR_NOT_SUPPORTED : ERROR_NONE;+ }+ if (preset > PROFILES.size()) {
return ERROR_NONE;
}
Note: this behaviour predates this PR (already present at merge base f79c5c4c1438); the change keeps it reachable.
The subcase checks mesh_get_network_settings, which returns stored settings. It does not read host->network. Capture the MeshHost* passed to loopbackCreate, then call mesh_host_get_network and assert path_hash_size == 3. If configure stops updating host->network, the test must fail.
The new test checks only preset regions. A wrong frequency that remains within the region, spreading factor, or coding rate can pass. Existing service tests use a synthetic backend and do not cover MeshCore named presets. Add representative get_radio_profile assertions for the changed named presets.
191-202: Trivial · Data Integrity & Integration · Heavy lift
Add an emitted-frame regression test for scoped transmission.
The helper tests do not exercise send_text through applyNetwork. A regression could emit the wrong route, transport code, or path-hash size while these tests remain green. Capture mesh_host_transmit, parse the emitted frame, and assert those fields with configured network settings.
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Reject presets the current region cannot fit before committing them.
mesh_set_preset() commits ShortTurbo on an EU-868 radio. Its 500 kHz bandwidth exceeds the 250 kHz region span. Reconfiguration then fails, the mesh enters MESH_STATE_ERROR, and the prior preset is not restored. Check the preset against the current region before commitBackendSettings(), and reject when getRadioProfile() does not return ERROR_NONE.
Reference: existing check in mesh_set_radio_settings
mesh_set_radio_settings() already rejects an incompatible channel with ERROR_OUT_OF_RANGE. fitsRegion() is defined after mesh_set_preset(), so it needs a forward declaration or a move before use.
🟡 Minor (2)
Minor · Break ties in the launcher sort with the app ID. · AppsMode.cpp:114
strcasecmp(...) < 0 returns false in both directions for names that differ only in case, such as Chat and chat. The previous < gave them a fixed order. Now their relative order depends on the unstable sort and the input order, so tile positions can swap between repopulations. Use the app ID as a tie-breaker. IDs are unique.
Suggested fix
::std::ranges::sort(items, [](const TileGridItem& a, const TileGridItem& b) {
if (a.highlighted != b.highlighted) {
return a.highlighted;
}
- return strcasecmp(a.name.c_str(), b.name.c_str()) < 0;+ const int nameOrder = strcasecmp(a.name.c_str(), b.name.c_str());+ if (nameOrder != 0) {+ return nameOrder < 0;+ }+ return a.id < b.id;
});
Minor · Reject out-of-range path_hash_size in mesh_set_network_settings. · mesh_service.cpp:1663-1666
Reject out-of-range path_hash_size in mesh_set_network_settings.
The setter stores any path_hash_size value. getNetwork returns a nonzero stored value unchanged, so mesh_get_network_parameters can report a value such as 4. applyNetwork clamps flood packets to 1–3, so those packets use 3. The reported value and the transmitted value then differ. Reject nonzero values outside 1–3 in the setter. Keep 0, which selects the preset value.
Documenting the clamp in mesh.h does not fix this. The getter is documented to return the parameters a backend runs with, and it would still report the unclamped value.
Add a MeshCore test for the channel removal callback.
The loopback assertion at service_test.cpp:679 expects ERROR_NOT_SUPPORTED. The loopback backend has no remove_channel callback, so mesh_remove_channel() returns that error before any backend call. A regression that returns ERROR_NOT_SUPPORTED for channel 0 before dispatch would still pass this test.
No test calls the MeshCore removeChannel callback (meshcore_backend.cpp:691, registered at :722). Add a test that calls mesh_remove_channel() with the MeshCore backend active and asserts the expected success result. This exercises the service dispatch and the backend callback together.
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Actionable comments posted: 6
Caution
Some comments are outside the diff and can’t be posted inline due to GitHub limitations.
⚠️ Outside diff range comments (1)
Minor · Rolled-back firmware drops saved channels, and channel edits… · meshtastic_backend.cpp:246-251
Modules/mesh-meshtastic-module/source/meshtastic_backend.cpp:246-251 🗄️ Data Integrity & Integration | 🟡 Minor | ⚖️ Poor tradeoff
Rolled-back firmware drops saved channels, and channel edits there overwrite channels.bin.
The new saveChannels writes the MTCH marker before the channel records. The merge-base loadChannels starts its record loop at offset 0 with a 66-byte record size, so it cannot skip the marker. Each record is read 4 bytes early. The key-length byte then lands on name byte 28, which is 0 for typical names, so every record is rejected. The loader falls back to the default LongFast channel with the default PSK, and the saved primary and custom channels are not restored. A name byte of 16 or 32 at that offset would load a wrong key instead. That case is rare.
Running base firmware does not rewrite the file at boot. saveChannels runs only from setChannel and removeChannel. If a user edits channels under base firmware, the base in-memory list (default channel only, plus the new entry) is written in the legacy layout. The original keys are then lost, even after returning to current firmware. Reflashing current firmware before any channel edit restores the saved channels.
A separate versioned file alone is not a safe correction. A later base-firmware edit would write channels.bin, while current firmware would keep reading the stale versioned file and discard that edit. A fix needs a rule for which file owns the data. No localized diff is established, so none is proposed.
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Follow-up findings are listed below so you can review them separately from inline comments.
Follow-up (1)
🟡 Minor (1)
Minor · Restore the previous region when the preset save fails. · MeshSettings.cpp:588-591
Restore the previous region when the preset save fails.
onPresetSelected() saves the new region before it calls mesh_set_preset(). Saving a region applies it to the radio at once. If mesh_set_preset() then fails, the radio keeps the new region, but the previous preset stays selected. The mesh service reconfigures the radio with that preset when the region changes, and this can put the mesh in the error state. The return value of mesh_set_preset() is not checked.
Capture the previous region before the save. If mesh_set_preset() fails, restore that region. Log the error when the restore also fails.
loadRegion() returns RADIO_REGION_UNSET when no region is stored. Restoring that value is accepted by saveRegion().
🐛 Suggested fix
RadioRegion region = RADIO_REGION_UNSET;
if (mesh_get_preset_region(ctx->presetBackend, name, ®ion) == ERROR_NONE && region != RADIO_REGION_UNSET && region != settings::radio::loadRegion()) {
- if (!settings::radio::saveRegion(region)) {- LOG_E(TAG, "Failed to save the region, so the preset isn't selected");- return;- }+ const RadioRegion previousRegion = settings::radio::loadRegion();+ if (!settings::radio::saveRegion(region)) {+ LOG_E(TAG, "Failed to save the region, so the preset isn't selected");+ return;+ }+ if (mesh_set_preset(ctx->presetBackend, name) != ERROR_NONE &&+ !settings::radio::saveRegion(previousRegion)) {+ LOG_E(TAG, "Failed to restore the previous region");+ }+ return;
}
mesh_set_preset(ctx->presetBackend, name);
Cover a failed first migration followed by a service lookup.
The new test calls mesh_settings_migrate_legacy() directly and never reaches getBackendSettings(). The retry gate runs only on a service lookup, so no test in the inspected file exercises it. Nothing checks that a failed migration leaves the flag unset or that a later lookup retries. A change that sets legacySettingsMigrated without checking the result, or that skips the retry, would not fail the tests that were inspected.
Add a service-level test. Make the first migration fail, perform a later lookup through a mesh_* call that reaches getBackendSettings(), and check the owner's settings. fakeDataApi has no failure option, so the test also needs a way to make the settings file open fail.
The new region loop skips every preset whose get_radio_profile call does not return ERROR_NONE. A refused LongFast lookup for US 915 therefore skips the fit check without failing. No other test asserts a successful LongFast profile lookup for RADIO_REGION_US_915. A change that refuses LongFast in that region can pass the suite.
Add a test that asserts ERROR_NONE for LongFast in US 915, following the ShortTurbo assertion pattern. If the preset lookup is changed, confirm that the preset is present before using its index.
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Modules/mesh-module/private/mesh/mesh_settings.h
Modules/mesh-module/source/mesh_settings.cpp
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Actionable comments posted: 1
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KenVanHoeylandt
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Summary by CodeRabbit
New Features
Bug Fixes
Documentation