Trying to solve ESP32-webcam timeouts

Trying to solve ESP32-webcam timeouts on Settings save by adding delays in between file write chunks and diabling NVS writes when stream is active. (#13882)

tasmota/settings.ino

@@ -694,7 +694,7 @@ void SettingsLoad(void) {
   if (source) {
     settings_location = 1;
     if (Settings->cfg_holder == (uint16_t)CFG_HOLDER) {
-      AddLog(LOG_LEVEL_NONE, PSTR(D_LOG_CONFIG "Loaded from %s, " D_COUNT " %lu"), (source)?"File":"Nvm", Settings->save_flag);
+      AddLog(LOG_LEVEL_NONE, PSTR(D_LOG_CONFIG "Loaded from %s, " D_COUNT " %lu"), (2 == source)?"File":"NVS", Settings->save_flag);
     }
   }
 #endif  // ESP32

tasmota/support_esp.ino

@@ -137,34 +137,43 @@ String GetDeviceHardware(void) {
 
 #include <esp_phy_init.h>
 
-void NvmLoad(const char *sNvsName, const char *sName, void *pSettings, unsigned nSettingsLen) {
-  nvs_handle handle;
-  noInterrupts();
-  nvs_open(sNvsName, NVS_READONLY, &handle);
+bool NvmLoad(const char *sNvsName, const char *sName, void *pSettings, unsigned nSettingsLen) {
+  nvs_handle_t handle;
+//  noInterrupts();
+  esp_err_t result = nvs_open(sNvsName, NVS_READONLY, &handle);
+  if (result != ESP_OK) {
+    AddLog(LOG_LEVEL_DEBUG, PSTR("NVS: Error %d"), result);
+    return false;
+  }
   size_t size = nSettingsLen;
   nvs_get_blob(handle, sName, pSettings, &size);
   nvs_close(handle);
-  interrupts();
+//  interrupts();
+  return true;
 }
 
 void NvmSave(const char *sNvsName, const char *sName, const void *pSettings, unsigned nSettingsLen) {
-  nvs_handle handle;
-  noInterrupts();
-  nvs_open(sNvsName, NVS_READWRITE, &handle);
+  nvs_handle_t handle;
+//  noInterrupts();
+  esp_err_t result = nvs_open(sNvsName, NVS_READWRITE, &handle);
+  if (result != ESP_OK) {
+    AddLog(LOG_LEVEL_DEBUG, PSTR("NVS: Error %d"), result);
+    return;
+  }
   nvs_set_blob(handle, sName, pSettings, nSettingsLen);
   nvs_commit(handle);
   nvs_close(handle);
-  interrupts();
+//  interrupts();
 }
 
 int32_t NvmErase(const char *sNvsName) {
-  nvs_handle handle;
-  noInterrupts();
+  nvs_handle_t handle;
+//  noInterrupts();
   int32_t result = nvs_open(sNvsName, NVS_READWRITE, &handle);
   if (ESP_OK == result) { result = nvs_erase_all(handle); }
   if (ESP_OK == result) { result = nvs_commit(handle); }
   nvs_close(handle);
-  interrupts();
+//  interrupts();
   return result;
 }
 
@@ -208,23 +217,25 @@ void SettingsErase(uint8_t type) {
 }
 
 uint32_t SettingsRead(void *data, size_t size) {
-  uint32_t source = 1;
-#ifdef USE_UFILESYS
-  if (!TfsLoadFile(TASM_FILE_SETTINGS, (uint8_t*)data, size)) {
-#endif
-    source = 0;
-    NvmLoad("main", "Settings", data, size);
 #ifdef USE_UFILESYS
+  if (TfsLoadFile(TASM_FILE_SETTINGS, (uint8_t*)data, size)) {
+    return 2;
   }
 #endif
-  return source;
+  if (NvmLoad("main", "Settings", data, size)) {
+    return 1;
+  };
+  return 0;
 }
 
 void SettingsWrite(const void *pSettings, unsigned nSettingsLen) {
 #ifdef USE_UFILESYS
   TfsSaveFile(TASM_FILE_SETTINGS, (const uint8_t*)pSettings, nSettingsLen);
 #endif
-  NvmSave("main", "Settings", pSettings, nSettingsLen);
+#ifdef USE_WEBCAM
+  if (!WcStreamActive())
+#endif
+    NvmSave("main", "Settings", pSettings, nSettingsLen);
 }
 
 void QPCRead(void *pSettings, unsigned nSettingsLen) {

tasmota/xdrv_50_filesystem.ino

@@ -294,7 +294,23 @@ bool TfsSaveFile(const char *fname, const uint8_t *buf, uint32_t len) {
     return false;
   }
 
-  file.write(buf, len);
+//  This will timeout on ESP32-webcam
+//  file.write(buf, len);
+
+  uint32_t count = len / 512;
+  uint32_t chunk = len / count;
+  for (uint32_t i = 0; i < count; i++) {
+    file.write(buf + (i * chunk), chunk);
+    // do actually wait a little to allow ESP32 tasks to tick
+    // fixes task timeout in ESP32Solo1 style unicore code and webcam.
+    delay(10);
+    OsWatchLoop();
+  }
+  uint32_t left = len % count;
+  if (left) {
+    file.write(buf + (count * chunk), left);
+  }
+
   file.close();
   return true;
 }

tasmota/xdrv_81_esp32_webcam.ino

@@ -876,6 +876,10 @@ void WcStreamControl() {
   WcSetup(Settings->webcam_config.resolution);
 }
 
+bool WcStreamActive(void) {
+  return (Wc.stream_active);
+}
+
 /*********************************************************************************************/