Added powersaving to all ESP32 boards with RTC-supported DIO1

Added CLI to enable/disable powersaving

examples/simple_repeater/MyMesh.cpp

@@ -1115,3 +1115,8 @@ void MyMesh::loop() {
   uptime_millis += now - last_millis;
   last_millis = now;
 }
+
+// To get the current pending work
+int MyMesh::hasPendingWork() const {
+  return _mgr->getOutboundCount(0xFFFFFFFF);
+}

examples/simple_repeater/MyMesh.h

@@ -225,4 +225,7 @@ public:
     bridge.begin();
   }
 #endif
+
+  // To get the current pending work
+  int hasPendingWork() const;
 };

examples/simple_repeater/main.cpp

@@ -19,12 +19,19 @@ void halt() {
 
 static char command[160];
 
+// For power saving
+unsigned long lastActive = 0; // mark last active time
+unsigned long nextSleepinSecs = 120; // next sleep in seconds. The first sleep (if enabled) is after 2 minutes from boot
+
 void setup() {
   Serial.begin(115200);
   delay(1000);
 
   board.begin();
 
+  // For power saving
+  lastActive = millis(); // mark last active time since boot
+
 #ifdef DISPLAY_CLASS
   if (display.begin()) {
     display.startFrame();
@@ -117,4 +124,15 @@ void loop() {
   ui_task.loop();
 #endif
   rtc_clock.tick();
+
+  if (the_mesh.getNodePrefs()->powersaving_enabled &&                     // To check if power saving is enabled
+      the_mesh.millisHasNowPassed(lastActive + nextSleepinSecs * 1000)) { // To check if it is time to sleep
+    if (the_mesh.hasPendingWork() == 0) { // No pending work. Safe to sleep
+      board.sleep(1800);             // To sleep. Wake up after 30 minutes or when receiving a LoRa packet
+      lastActive = millis();
+      nextSleepinSecs = 5;  // Default: To work for 5s and sleep again
+    } else {
+      nextSleepinSecs += 5; // When there is pending work, to work another 5s
+    }
+  }
 }