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M3 step 5: Sweep, the band's signal strength as bars and a waterfall

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Tab in the LoRa Scanner sweeps 863-870 MHz in 100 kHz steps (the
strongest of three RSSI readings at each, at 125 kHz), shown as bars with
peak hold over a waterfall, the Sniffer's frequency marked (Q98). The
Sweep pauses the Sniffer and keeps its packets; Tab resumes it (Q99).
Status Bar: SW. The floor, top and peaks are host-tested; `lora sweep
on|off|dump` prints them on the console.

At the desk: about 607 ms a pass, a flat floor at -100 to -102 dBm
(15 dB above the chip's own) and a steady carrier at 863.2 MHz.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT
This commit is contained in:
twisla
2026-10-05 20:28:46 +02:00
co-authored by Claude Opus 5.5
parent 2fce79aebd
commit b1de0f8804
12 changed files with 425 additions and 12 deletions
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src/apps/lora_scanner_app.h
+11 -2
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@@ -15,7 +15,8 @@ namespace roro {
// The LoRa Scanner (docs/milestones/M3.md). Sniffer: the packets the radio hears, newest first,
// with the Meshtastic header read (Q96) and a hex dump on Enter; p picks the preset (Q95), c starts
// or stops a Capture (Q97). The radio listens while the App is open (Q100).
// or stops a Capture (Q97). The radio listens while the App is open (Q100). Tab: Sweep, the band's
// RSSI as bars with peak hold and a waterfall (Q98); it pauses the Sniffer while shown (Q99).
class LoraScannerApp : public App {
public:
LoraScannerApp(RadioService& radio, LoraCaptureService& capture, Settings& settings, ClockService& clock)
@@ -27,12 +28,14 @@ class LoraScannerApp : public App {
void draw(Canvas& c) override;
private:
enum class View { Packets, Details, Presets };
enum class View { Packets, Details, Presets, Sweep };
static constexpr int kListRows = 7;
void drawPackets(Canvas& c);
void drawDetails(Canvas& c);
void drawPresets(Canvas& c);
void drawSweep(Canvas& c);
void showSweep(bool on);
void openDetails();
std::string timeOf(const RadioPacket& p) const;
bool meshtasticSettings() const;
@@ -53,6 +56,12 @@ class LoraScannerApp : public App {
uint32_t lastDrawMs_ = 0;
std::string message_;
uint32_t messageMs_ = 0;
// Sweep, only while shown: peak hold per step, and the waterfall, newest row first.
static constexpr int kWaterfallRows = 36;
uint32_t shownSweep_ = 0;
std::vector<int8_t> peak_;
std::vector<int8_t> waterfall_; // kWaterfallRows x steps
uint16_t sweepSteps_ = 0;
};
} // namespace roro