feat(moneo): recorder + main sketch (single-file WAV, reliable touch) by Ricky1207-sen · Pull Request #6 · debloper/exocortex

Ricky1207-sen · 2026-06-21T17:29:16Z

Adds the moneo recorder and the main sketch that drives it.

Recorder (Recorder.cpp/.h)

Captures audio into a single continuous WAV on the SD card (no chunks).
Writes each ~10s segment with open → append → close, so a power loss can corrupt at most the last segment, not the whole recording. Header is finalized with the real length on stop.
Datetime filenames (rec_YYYYMMDD_HHMMSS.wav) via NTP, millis-based fallback.
8-bit / 16kHz mono.

Touch reliability

Confirmation read in the touch handler to reject spurious interrupt noise
(was causing phantom start/stop and auto-restarts).
Config.h: TOUCH_THRESHOLD 22000 → 50000, DEBOUNCE_DELAY 2000 → 5000.

Main sketch (moneo.ino)

Wires touch → record → stop → WiFi (WiFiMulti) together.
AIClient (audio → notes) is commented out / marked TODO since AIClient isn't
in the repo yet — enabled in a follow-up PR.

debloper

Some changes are necessary, some are good to have and rest of them are comments/FYI.

debloper · 2026-06-25T17:50:46Z

-const int          TOUCH_THRESHOLD  = 22000;
-const unsigned long DEBOUNCE_DELAY  = 2000;
+const int          TOUCH_THRESHOLD  = 50000;
+const unsigned long DEBOUNCE_DELAY  = 5000;


That's too long IMO; but not a blocker.

debloper · 2026-06-25T18:16:50Z

+void setup() {
+    Serial.begin(115200);
+    unsigned long t = millis();
+    while (!Serial && millis() - t < 500) delay(10);


By the time you're counting the millis() it may already be over 500ms (as in, it's not a deterministic timeout).

A better way could be:

unsigned long serialTimeout = millis() + 500; while (!Serial && millis() < serialTimeout) { delay(10); }

In this way the timeout starts when we start waiting for Serial, and waits for 500ms (however, I think 100ms is more than enough). Also, probably should put the waiting duration inside the Config.h instead of putting the raw values here.

debloper · 2026-06-25T18:22:10Z

+
+    touchAttachInterrupt(TOUCH_PIN, onTouch, TOUCH_THRESHOLD);
+
+    Serial.println("[Moneo] Ready. Touch pin D1 to start recording.");


Redundant consecutive instructions to touch pin to start recording (recorder.begin already logs this just above). One of those is not necessary.

debloper · 2026-06-25T18:40:21Z

+    }
+    _wasRecording = nowRecording;
+
+    delay(10);


Too short interval I think... checking each 0.1sec (100ms) is more than sufficient. Even 1s/1000ms would be snappy enough for any practical purposes.

debloper · 2026-06-25T18:57:11Z

+{}
+
+bool Recorder::begin() {
+    if (!SD.begin(SD_CARD_PIN)) {


Would work as SD.h etc. are included in the Recorder.h file, but the best practice is to include the headers where they're being used... so in this file.

Not a blocker/must.

debloper · 2026-06-25T18:58:59Z

+        DLOG("[Recorder] I2S init failed!");
+        return false;
+    }
+    DLOG("[Recorder] I2S initialized (16kHz, 8-bit).");


Don't hardcode config parameters in log.

It can be misleading while debugging (if the config values changed, and then forgotten).

debloper · 2026-06-25T19:01:49Z

+void Recorder::requestToggle() {
+    _toggleRequested = true;
+}


The nested wrapping of onTouch -> requestToggle -> toggleRequested seems a bit too deep fried.

It will work, so not a blocker... but perhaps not the most elegant way.

debloper · 2026-06-25T19:11:44Z

+    _psramWritten  = 0;
+
+    // Try NTP time sync
+    configTime(19800, 0, "pool.ntp.org");  // UTC+5:30 for IST


NTP sync should be in main INO file's setup section (as with any runtime blocking/stalling subroutine), and kept alongside the lastTimeSync as millis() value when it was sync'd, so that current time can always be calculated without needing to make another network request (by adding the elapsed time sinch the last sync, with the last sync'd timestamp).

As it currently is, nothing is even ensuring the WiFi is connected (most likely isn't) so the request would just fail.

debloper · 2026-06-25T19:18:06Z

+    xTaskCreatePinnedToCore(_captureTaskEntry, "Capture", 4096,
+                            this, 5, &_captureTask_h, 1);
+    xTaskCreatePinnedToCore(_writerTaskEntry,  "Writer",  8192,
+                            this, 3, &_writerTask_h,  1);


This is nice to use the second core for compute heavy non-management task. Will have to check how it works out in terms of real world impact.

debloper · 2026-06-25T19:21:38Z

+    File f = SD.open(_wavPath.c_str(), FILE_APPEND);
+    if (!f) {
+        // Keep the buffer and retry on the next cycle rather than dropping audio.
+        DLOG("[Writer] Append open failed; will retry next segment.");


NOPE... that's gonna be a corrupt/incomplete recording (with parts missing).

Log the failure and close the recording. Blink error.

Copilot

Pull request overview

Adds the Stage 2 moneo recording pipeline: a PSRAM-buffered recorder that appends audio into a single WAV on SD in periodic segments, plus a main sketch that drives touch-to-record and WiFi connect-on-stop behavior.

Changes:

Introduces Recorder (FreeRTOS capture/writer tasks) that writes one WAV per session with periodic append/close cycles.
Adds moneo.ino main sketch wiring touch interrupt → recorder lifecycle → WiFi connection after recording completes.
Adjusts touch threshold and debounce constants in Config.h for improved touch stability.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 6 comments.

File	Description
moneo/Recorder.h	Declares the recorder API and task/buffer state for PSRAM-based capture + periodic SD append.
moneo/Recorder.cpp	Implements WAV header writing, capture/writer tasks, segment flushing, and start/stop lifecycle.
moneo/moneo.ino	Main Arduino sketch wiring touch interrupt handling, recording state transitions, and WiFi processing on stop.
moneo/Config.h	Updates touch threshold/debounce values for noise rejection and stability.

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+    // Confirm a real touch is still present. The interrupt can fire on brief
+    // electrical noise; a genuine press is still held when we reach here (reads
+    // above threshold), while a noise spike has already decayed and is rejected.
+    if (touchRead(TOUCH_PIN) < TOUCH_THRESHOLD) return;
+


+    bool begin();
+    void loop();
+    void requestToggle();
+


+void Recorder::requestToggle() {
+    _toggleRequested = true;
+}


+    size_t written = f.write(_psramBuf, _psramWritten);
+    f.close();
+
+    _dataLength  += written;
+    _psramWritten = 0;
+    DLOGF("[Writer] Appended %u bytes (total: %u)\n", written, _dataLength);


+    // Append whatever is left in the buffer. The tasks have stopped, so no
+    // mutex is needed here.
+    _flushSegment();


+    // Try NTP time sync
+    configTime(19800, 0, "pool.ntp.org");  // UTC+5:30 for IST
+    delay(500);
+
+    _wavPath = _generateFilename();


…cludes, log/serial cleanups

Ricky1207-sen added 2 commits June 21, 2026 22:56

feat(moneo): add recorder — single-file WAV capture to SD

582cbf4

feat(moneo): open-close recorder, touch reliability, and main sketch

1818013

Ricky1207-sen changed the title ~~feat(moneo): add recorder — single-file continuous WAV file capture to SD~~ feat(moneo): recorder + main sketch (single-file WAV, reliable touch) Jun 24, 2026

debloper requested changes Jun 25, 2026

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debloper requested a review from Copilot June 25, 2026 19:30

Copilot started reviewing on behalf of debloper June 25, 2026 19:30 View session

Copilot AI reviewed Jun 25, 2026

View reviewed changes

fix(moneo): fail-loud on write errors, IRAM_ATTR touch ISR, header in…

ccfba5c

…cludes, log/serial cleanups

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feat(moneo): recorder + main sketch (single-file WAV, reliable touch)#6

feat(moneo): recorder + main sketch (single-file WAV, reliable touch)#6
Ricky1207-sen wants to merge 3 commits into
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Ricky1207-sen:feat/moneo-recorder

Ricky1207-sen commented Jun 21, 2026 •

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		touchAttachInterrupt(TOUCH_PIN, onTouch, TOUCH_THRESHOLD);

		Serial.println("[Moneo] Ready. Touch pin D1 to start recording.");

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Ricky1207-sen commented Jun 21, 2026 •

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