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The radio's noise: the GNSS receiver costs 8 dB; a setting pauses it (#20)

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Debug Builds: `lora noise test` changes one thing at a time, Sweeps the
band, and reports the floor under each condition; it runs on the device
by itself, since one condition pauses Wi-Fi (not saved, so a restart
brings it back). Result, at 125 kHz: -117 dBm with the antenna switched
off, -106 with the GNSS receiver in standby, -98 with it running. The
receiver's serial line isn't it (one sentence a second changes nothing),
and neither are the main loop, the CPU frequency, Wi-Fi, the screen or
the radio's own regulator, all within 1 dB.

Settings > "Pause GNSS for LoRa", off by default: the receiver waits in
standby while the radio listens or sweeps, except during a Track, and
has a Fix again about 7 s after. The GNSS App says it's paused.

11 dB remain between the antenna with GNSS quiet and the chip alone,
untouched by anything that can be switched from the firmware.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT
This commit is contained in:
twisla
2026-10-06 03:41:15 +02:00
co-authored by Claude Opus 5.5
parent 06a593293d
commit 70fb37ebb5
17 changed files with 337 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/apps_model/src/settings_menu.cpp
+4 -1
View File
@@ -20,7 +20,8 @@ const RowDef kRows[] = {
{Row::Region, Kind::Choice, "Region"}, {Row::Timezone, Kind::Choice, "Timezone"},
{Row::Brightness, Kind::Slider, "Brightness"}, {Row::DimTimeout, Kind::Choice, "Dim after"},
{Row::OffTimeout, Kind::Choice, "Screen off after"}, {Row::Sound, Kind::Toggle, "Sound & LED"},
{Row::Gnss, Kind::Toggle, "GNSS"}, {Row::Coordinates, Kind::Toggle, "Coordinates"},
{Row::Gnss, Kind::Toggle, "GNSS"}, {Row::GnssQuiet, Kind::Toggle, "Pause GNSS for LoRa"},
{Row::Coordinates, Kind::Toggle, "Coordinates"},
{Row::ProbeMacs, Kind::Toggle, "Probe MACs"}, {Row::Wifi, Kind::Page, "Wi-Fi"},
{Row::Storage, Kind::Page, "Storage"},
{Row::Firmware, Kind::Page, "Firmware"},
@@ -81,6 +82,7 @@ std::string SettingsMenu::value(int i) const {
case Row::OffTimeout: return formatSeconds(settings_.getInt(Setting::OffTimeoutS));
case Row::Sound: return settings_.getBool(Setting::Sound) ? "On" : "Off";
case Row::Gnss: return settings_.getBool(Setting::GnssEnabled) ? "On" : "Off";
case Row::GnssQuiet: return settings_.getBool(Setting::GnssQuietForLora) ? "On" : "Off";
case Row::Coordinates: return settings_.getBool(Setting::CoordinatesDms) ? "Deg min sec" : "Decimal";
case Row::ProbeMacs: return settings_.getBool(Setting::ProbeMacRaw) ? "Raw" : "Pseudonymised";
case Row::Wifi: return settings_.getBool(Setting::WifiEnabled) ? "On" : "Off";
@@ -126,6 +128,7 @@ std::string SettingsMenu::choose(int i, int c) {
void SettingsMenu::toggle(int i) {
if (row(i) == Row::Sound) settings_.setBool(Setting::Sound, !settings_.getBool(Setting::Sound));
if (row(i) == Row::Gnss) settings_.setBool(Setting::GnssEnabled, !settings_.getBool(Setting::GnssEnabled));
if (row(i) == Row::GnssQuiet) settings_.setBool(Setting::GnssQuietForLora, !settings_.getBool(Setting::GnssQuietForLora));
if (row(i) == Row::Coordinates) settings_.setBool(Setting::CoordinatesDms, !settings_.getBool(Setting::CoordinatesDms));
if (row(i) == Row::ProbeMacs) settings_.setBool(Setting::ProbeMacRaw, !settings_.getBool(Setting::ProbeMacRaw));
}