Implement deep sleep after timeout

src/config.cpp

@@ -9,3 +9,5 @@ Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
 AsyncWebServer server(80);
 Audio audio;
 Preferences preferences;
+
+long lastActionTime = 0;

src/config.h

@@ -19,8 +19,10 @@
 // GPIO
 #define LED 2
 #define BUTTON 33
+#define DEEP_SLEEP_WAKEUP GPIO_NUM_33
 
-#define DEBOUNCE_DELAY 1000
+#define DEBOUNCE_DELAY_MS 1000
+#define DEEP_SLEEP_DELAY_MS 3600000  // 1h
 
 // Screen
 #define SSD1306_NO_SPLASH
@@ -54,5 +56,6 @@ extern Adafruit_SSD1306 display;
 extern AsyncWebServer server;
 extern Audio audio;
 extern Preferences preferences;
+extern long lastActionTime;
 
 #endif

src/main.cpp

@@ -10,6 +10,7 @@
 
 byte buttonLastState = HIGH;
 long lastDebounceTime = 0;
+bool wasRunning = false;
 
 void setup()
 {
@@ -38,32 +39,43 @@ void setup()
   displayWifiCreds();
   displayStatus();
 
-  // Setup is done, light up the LED
-  Serial.println("All setup & ready to go!");
   setCpuFrequencyMhz(80);
+  
+  // Setup is done, light up the LED
+  delay(500);
+  Serial.println("All setup & ready to go!");
   digitalWrite(LED, HIGH);
+  updateLastAction();
+  wasRunning = audio.isRunning();
 }
 
 void loop()
 {
-  if ((millis() - lastDebounceTime) > DEBOUNCE_DELAY)
+  if ((millis() - lastDebounceTime) > DEBOUNCE_DELAY_MS)
   {
     byte buttonCurrentState = digitalRead(BUTTON);
     if (buttonCurrentState == LOW && buttonLastState == HIGH)
       play();
     buttonLastState = buttonCurrentState;
   }
-  audio.loop();
-}
 
-void audio_info(const char *info){
-  String s_info = info;
-  s_info.toLowerCase();
-  s_info.trim();
-  if (s_info == "closing audio file") {
-    setCpuFrequencyMhz(80);
-  }
-  else if (s_info == "stream ready") {
+  audio.loop();
+
+  bool running = audio.isRunning();
+  if (running && !wasRunning)
+  {
+    wasRunning = true;
     setCpuFrequencyMhz(240);
   }
+  else if (!running && wasRunning)
+  {
+    wasRunning = false;
+    updateLastAction();
+    setCpuFrequencyMhz(80);
+  }
+
+  if (!running && ((millis() - lastActionTime) > DEEP_SLEEP_DELAY_MS))
+  {
+    deepSleep();
+  }
 }

src/utils.cpp

@@ -5,6 +5,7 @@
 #include <SD.h>
 
 #include "config.h"
+#include "utils.h"
 
 bool fileIsValid(String fileName)
 {
@@ -31,6 +32,7 @@ void displayText(String text)
 
 void play()
 {
+  updateLastAction();
   String selectedFile = preferences.getString(SELECTED_FILE);
   String path = "/" + selectedFile;
   Serial.println("Playing file: " + path);
@@ -38,7 +40,6 @@ void play()
   audio.connecttoFS(SD, path.c_str());
 }
 
-
 void diagnosticPrint(String text)
 {
   Serial.print(text);
@@ -97,3 +98,21 @@ void selectFile(String fileName)
   Serial.print("Select new file: ");
   Serial.println(fileName);
 }
+
+void deepSleep()
+{
+  display.clearDisplay();
+  display.setCursor(0, 0);
+  display.println("Veille. Retourne-moi pour me reveiller.");
+  display.display();
+
+  Serial.println("Deep sleep!");
+  esp_sleep_enable_ext0_wakeup(DEEP_SLEEP_WAKEUP, HIGH);
+  digitalWrite(LED, LOW);
+  esp_deep_sleep_start();
+}
+
+void updateLastAction()
+{
+  lastActionTime = millis();
+}

src/utils.h

@@ -19,4 +19,9 @@ void displayStatus();
 void diagnosticPrint(String text);
 void diagnosticPrintln(String text);
 
+void deepSleep();
+
+void audio_info(const char *info);
+void updateLastAction();
+
 #endif

src/webHandlers.cpp

@@ -11,6 +11,7 @@
 
 void onStop(AsyncWebServerRequest *request)
 {
+  updateLastAction();
   Serial.println("Stop playing");
   audio.stopSong();
   request->send(200);
@@ -43,6 +44,7 @@ void onStatus(AsyncWebServerRequest *request)
 
 void onListFiles(AsyncWebServerRequest *request)
 {
+  updateLastAction();
   Serial.print("List files cursor=");
   int cursor = 0;
   if (request->hasParam("cursor")) {
@@ -87,6 +89,7 @@ void onListFiles(AsyncWebServerRequest *request)
 
 void onSelectFile(AsyncWebServerRequest *request)
 {
+  updateLastAction();
   Serial.println("Select file");
   if (request->hasParam("fileName", true))
   {
@@ -98,6 +101,7 @@ void onSelectFile(AsyncWebServerRequest *request)
 
 void onChangeVolume(AsyncWebServerRequest *request)
 {
+  updateLastAction();
   Serial.print("Volume: ");
   if (request->hasParam("modifier", true))
   {
@@ -120,12 +124,14 @@ void onChangeVolume(AsyncWebServerRequest *request)
 
 void onUpload(AsyncWebServerRequest *request)
 {
+  updateLastAction();
   Serial.println("onUpload");
   request->send(200);
 }
 
 void onUploadFile(AsyncWebServerRequest *request, String filename, size_t index, uint8_t *data, size_t len, bool final)
 {
+  updateLastAction();
   if (!index)
   {
     Serial.printf("Upload start: %s\n", filename.c_str());