Merge f9b830b5ea into dee3e26ac0

examples/companion_radio/main.cpp

@@ -110,6 +110,10 @@ void setup() {
 
   board.begin();
 
+#ifdef HAS_EXTERNAL_WATCHDOG
+  external_watchdog.begin();
+#endif
+
 #ifdef DISPLAY_CLASS
   DisplayDriver* disp = NULL;
   if (display.begin()) {
@@ -229,4 +233,7 @@ void loop() {
   ui_task.loop();
 #endif
   rtc_clock.tick();
+#ifdef HAS_EXTERNAL_WATCHDOG
+  external_watchdog.loop();
+#endif
 }

examples/simple_repeater/main.cpp

@@ -34,6 +34,10 @@ void setup() {
 
   board.begin();
 
+#ifdef HAS_EXTERNAL_WATCHDOG
+  external_watchdog.begin();
+#endif
+
 #if defined(MESH_DEBUG) && defined(NRF52_PLATFORM)
   // give some extra time for serial to settle so
   // boot debug messages can be seen on terminal
@@ -154,17 +158,31 @@ void loop() {
 #endif
   rtc_clock.tick();
 
+#ifdef HAS_EXTERNAL_WATCHDOG
+  external_watchdog.loop();
+#endif
   if (the_mesh.getNodePrefs()->powersaving_enabled && !the_mesh.hasPendingWork()) {
-    #if defined(NRF52_PLATFORM)
+#if defined(NRF52_PLATFORM)
+#ifdef HAS_EXTERNAL_WATCHDOG
+    uint32_t sleep_interval = external_watchdog.getIntervalMs()/1000;
+    board.sleep((sleep_interval > 1800) ? 1800 : sleep_interval);             // To sleep. Wake up after 30 minutes or when receiving a LoRa packet
+#else
+    board.sleep(1800);             // To sleep. Wake up after 30 minutes or when receiving a LoRa packet
+#endif
     board.sleep(1800); // nrf ignores seconds param, sleeps whenever possible
-    #else
+#else
     if (the_mesh.millisHasNowPassed(lastActive + nextSleepinSecs * 1000)) { // To check if it is time to sleep
+#ifdef HAS_EXTERNAL_WATCHDOG
+      uint32_t sleep_interval = external_watchdog.getIntervalMs()/1000;
+      board.sleep((sleep_interval > 1800) ? 1800 : sleep_interval);             // To sleep. Wake up after 30 minutes or when receiving a LoRa packet
+#else
       board.sleep(1800);             // To sleep. Wake up after 30 minutes or when receiving a LoRa packet
+#endif
       lastActive = millis();
       nextSleepinSecs = 5;  // Default: To work for 5s and sleep again
     } else {
       nextSleepinSecs += 5; // When there is pending work, to work another 5s
     }
-    #endif
+#endif
   }
 }

examples/simple_room_server/main.cpp

@@ -24,6 +24,10 @@ void setup() {
 
   board.begin();
 
+#ifdef HAS_EXTERNAL_WATCHDOG
+  external_watchdog.begin();
+#endif
+
 #ifdef DISPLAY_CLASS
   if (display.begin()) {
     display.startFrame();
@@ -113,4 +117,7 @@ void loop() {
   ui_task.loop();
 #endif
   rtc_clock.tick();
+#ifdef HAS_EXTERNAL_WATCHDOG
+  external_watchdog.loop();
+#endif
 }

examples/simple_secure_chat/main.cpp

@@ -560,6 +560,10 @@ void setup() {
 
   board.begin();
 
+#ifdef HAS_EXTERNAL_WATCHDOG
+  external_watchdog.begin();
+#endif
+
   if (!radio_init()) { halt(); }
 
   fast_rng.begin(radio_get_rng_seed());
@@ -591,4 +595,7 @@ void setup() {
 void loop() {
   the_mesh.loop();
   rtc_clock.tick();
+#ifdef HAS_EXTERNAL_WATCHDOG
+  external_watchdog.loop();
+#endif
 }

examples/simple_sensor/main.cpp

@@ -58,6 +58,10 @@ void setup() {
 
   board.begin();
 
+#ifdef HAS_EXTERNAL_WATCHDOG
+  external_watchdog.begin();
+#endif
+
 #ifdef DISPLAY_CLASS
   if (display.begin()) {
     display.startFrame();
@@ -147,4 +151,7 @@ void loop() {
   ui_task.loop();
 #endif
   rtc_clock.tick();
+#ifdef HAS_EXTERNAL_WATCHDOG
+  external_watchdog.loop();
+#endif
 }

src/helpers/ExternalWatchdogManager.h

@@ -0,0 +1,12 @@
+#pragma once
+
+class ExternalWatchdogManager {
+protected:
+  unsigned long next_feed_watchdog;
+public:
+  ExternalWatchdogManager() { next_feed_watchdog = 0; }
+  virtual bool begin() { return false; }
+  virtual void loop() { }
+  virtual unsigned long getIntervalMs() const { return 0; }
+  virtual void feed() { }
+};

variants/heltec_mesh_solar/platformio.ini

@@ -14,6 +14,11 @@ build_flags =  ${nrf52_base.build_flags}
   -D LORA_TX_POWER=22
   -D SX126X_CURRENT_LIMIT=140
   -D SX126X_RX_BOOSTED_GAIN=1
+  -D HAS_EXTERNAL_WATCHDOG
+  -D EXTERNAL_WATCHDOG_DONE_PIN=9
+  -D EXTERNAL_WATCHDOG_WAKE_PIN=10
+  -D EXTERNAL_WATCHDOG_TIMEOUT_MS=480000 ;(6*60*1000) ; 6 minute watchdog
+
 build_src_filter = ${nrf52_base.build_src_filter}
   +<helpers/*.cpp>
   +<../variants/heltec_mesh_solar>

variants/heltec_mesh_solar/target.cpp

@@ -13,6 +13,7 @@ VolatileRTCClock fallback_clock;
 AutoDiscoverRTCClock rtc_clock(fallback_clock);
 MicroNMEALocationProvider nmea = MicroNMEALocationProvider(Serial1, &rtc_clock);
 SolarSensorManager sensors = SolarSensorManager(nmea);
+SolarExternalWatchdog external_watchdog;
 
 #ifdef DISPLAY_CLASS
   DISPLAY_CLASS display;
@@ -121,3 +122,35 @@ bool SolarSensorManager::setSettingValue(const char* name, const char* value) {
   }
   return false;  // not supported
 }
+
+bool SolarExternalWatchdog::begin() {
+  next_feed_watchdog = 0;
+  pinMode(EXTERNAL_WATCHDOG_WAKE_PIN, INPUT);
+  pinMode(EXTERNAL_WATCHDOG_DONE_PIN, OUTPUT);
+  delay(1);
+  digitalWrite(EXTERNAL_WATCHDOG_DONE_PIN, LOW);
+  delay(1);
+  feed();
+  return true;
+}
+void SolarExternalWatchdog::loop() {
+  if (millis() > next_feed_watchdog) {
+    feed();
+    next_feed_watchdog = millis() + EXTERNAL_WATCHDOG_TIMEOUT_MS;
+  }
+}
+
+unsigned long SolarExternalWatchdog::getIntervalMs() const {
+    unsigned long interval_ms = 0;
+    interval_ms = next_feed_watchdog - millis();
+    if(interval_ms > EXTERNAL_WATCHDOG_TIMEOUT_MS) {
+      interval_ms = EXTERNAL_WATCHDOG_TIMEOUT_MS;
+    }
+    return interval_ms;
+}
+
+void SolarExternalWatchdog::feed() {
+    digitalWrite(EXTERNAL_WATCHDOG_DONE_PIN, HIGH);
+    delay(1);
+    digitalWrite(EXTERNAL_WATCHDOG_DONE_PIN, LOW);
+}

variants/heltec_mesh_solar/target.h

@@ -8,6 +8,7 @@
 #include <helpers/AutoDiscoverRTCClock.h>
 #include <helpers/SensorManager.h>
 #include <helpers/sensors/LocationProvider.h>
+#include <helpers/ExternalWatchdogManager.h>
 #ifdef DISPLAY_CLASS
   #include <helpers/ui/ST7789Display.h>
 #endif
@@ -30,10 +31,20 @@ public:
   bool setSettingValue(const char* name, const char* value) override;
 };
 
+class SolarExternalWatchdog : public ExternalWatchdogManager {
+public:
+    SolarExternalWatchdog() {}
+    bool begin() override;
+    void loop() override;
+    unsigned long getIntervalMs() const override;
+    void feed() override;
+};
+
 extern MeshSolarBoard board;
 extern WRAPPER_CLASS radio_driver;
 extern AutoDiscoverRTCClock rtc_clock;
 extern SolarSensorManager sensors;
+extern SolarExternalWatchdog external_watchdog;
 
 #ifdef DISPLAY_CLASS
   extern DISPLAY_CLASS display;

variants/heltec_mesh_solar/variant.h

@@ -34,8 +34,8 @@
 #define PIN_SERIAL1_RX          (37)
 #define PIN_SERIAL1_TX          (39)
 
-#define PIN_SERIAL2_RX          (9)
+#define PIN_SERIAL2_RX          (-1)
-#define PIN_SERIAL2_TX          (10)
+#define PIN_SERIAL2_TX          (-1)
 
 ////////////////////////////////////////////////////////////////////////////////
 // I2C pin definition