Tracker role wakeup and sleep cycle when power.is_power_saving true (#2846)

* WIP

* Sleepy sleepy low power tracker

* Sleepy tracker clear

* NRF52 PoC

* Simplify NRF52 "sleep"

* Trackers aren't polite

* Remove unnecessary include

* Removed accidental commit

* Fixed not-so-sleepy T-Beam due to button gpio mask precendence

* Added sleepOnNextExecution for allowing fulfillment of pending messages before shutting down

* Cleanup

* Don't wantResponse for trackers

* Heltec wireless tracker doesn't like the button interrupt (maybe all s3 because user button press doubles as bootloader mode trigger?)

src/Power.cpp

@@ -414,7 +414,7 @@ void Power::shutdown()
 #ifdef PIN_LED3
     ledOff(PIN_LED2);
 #endif
-    doDeepSleep(DELAY_FOREVER);
+    doDeepSleep(DELAY_FOREVER, false);
 #endif
 }
 

src/PowerFSM.cpp

@@ -45,7 +45,7 @@ static void sdsEnter()
 {
     LOG_DEBUG("Enter state: SDS\n");
     // FIXME - make sure GPS and LORA radio are off first - because we want close to zero current draw
-    doDeepSleep(getConfiguredOrDefaultMs(config.power.sds_secs));
+    doDeepSleep(getConfiguredOrDefaultMs(config.power.sds_secs), false);
 }
 
 extern Power *power;

src/concurrency/OSThread.h

@@ -67,6 +67,7 @@ class OSThread : public Thread
      * Returns desired period for next invocation (or RUN_SAME for no change)
      */
     virtual int32_t runOnce() = 0;
+    bool sleepOnNextExecution = false;
 
     // Do not override this
     virtual void run();

src/modules/PositionModule.cpp

@@ -1,4 +1,5 @@
 #include "PositionModule.h"
+#include "GPS.h"
 #include "MeshService.h"
 #include "NodeDB.h"
 #include "RTC.h"
@@ -7,6 +8,8 @@
 #include "airtime.h"
 #include "configuration.h"
 #include "gps/GeoCoord.h"
+#include "sleep.h"
+#include "target_specific.h"
 
 PositionModule *positionModule;
 
@@ -15,7 +18,21 @@ PositionModule::PositionModule()
       concurrency::OSThread("PositionModule")
 {
     isPromiscuous = true; // We always want to update our nodedb, even if we are sniffing on others
-    setIntervalFromNow(60 * 1000); // Send our initial position 60 seconds after we start (to give GPS time to setup)
+    if (config.device.role != meshtastic_Config_DeviceConfig_Role_TRACKER)
+        setIntervalFromNow(60 * 1000);
+
+    // Power saving trackers should clear their position on startup to avoid waking up and sending a stale position
+    if (config.device.role == meshtastic_Config_DeviceConfig_Role_TRACKER && config.power.is_power_saving) {
+        clearPosition();
+    }
+}
+
+void PositionModule::clearPosition()
+{
+    LOG_DEBUG("Clearing position on startup for sleepy tracker (ー。ー) zzz\n");
+    meshtastic_NodeInfoLite *node = nodeDB.getMeshNode(nodeDB.getNodeNum());
+    node->position.latitude_i = 0;
+    node->position.longitude_i = 0;
 }
 
 bool PositionModule::handleReceivedProtobuf(const meshtastic_MeshPacket &mp, meshtastic_Position *pptr)
@@ -148,7 +165,7 @@ void PositionModule::sendOurPosition(NodeNum dest, bool wantReplies, uint8_t cha
     }
 
     p->to = dest;
-    p->decoded.want_response = wantReplies;
+    p->decoded.want_response = config.device.role == meshtastic_Config_DeviceConfig_Role_TRACKER ? false : wantReplies;
     if (config.device.role == meshtastic_Config_DeviceConfig_Role_TRACKER)
         p->priority = meshtastic_MeshPacket_Priority_RELIABLE;
     else
@@ -159,10 +176,23 @@ void PositionModule::sendOurPosition(NodeNum dest, bool wantReplies, uint8_t cha
         p->channel = channel;
 
     service.sendToMesh(p, RX_SRC_LOCAL, true);
+
+    if (config.device.role == meshtastic_Config_DeviceConfig_Role_TRACKER && config.power.is_power_saving) {
+        LOG_DEBUG("Starting next execution in 3 seconds and then going to sleep.\n");
+        sleepOnNextExecution = true;
+        setIntervalFromNow(3000);
+    }
 }
 
 int32_t PositionModule::runOnce()
 {
+    if (sleepOnNextExecution == true) {
+        sleepOnNextExecution = false;
+        uint32_t nightyNightMs = getConfiguredOrDefaultMs(config.position.position_broadcast_secs);
+        LOG_DEBUG("Sleeping for %ims, then awaking to send position again.\n", nightyNightMs);
+        doDeepSleep(nightyNightMs, false);
+    }
+
     meshtastic_NodeInfoLite *node = nodeDB.getMeshNode(nodeDB.getNodeNum());
 
     // We limit our GPS broadcasts to a max rate
@@ -172,7 +202,7 @@ int32_t PositionModule::runOnce()
 
     if (lastGpsSend == 0 || msSinceLastSend >= intervalMs) {
         // Only send packets if the channel is less than 40% utilized.
-        if (airTime->isTxAllowedChannelUtil()) {
+        if (airTime->isTxAllowedChannelUtil(config.device.role != meshtastic_Config_DeviceConfig_Role_TRACKER)) {
             if (hasValidPosition(node)) {
                 lastGpsSend = now;
 

src/modules/PositionModule.h

@@ -49,6 +49,9 @@ class PositionModule : public ProtobufModule<meshtastic_Position>, private concu
 
   private:
     struct SmartPosition getDistanceTraveledSinceLastSend(meshtastic_PositionLite currentPosition);
+
+    /** Only used in power saving trackers for now */
+    void clearPosition();
 };
 
 struct SmartPosition {

src/platform/esp32/main-esp32.cpp

@@ -200,22 +200,15 @@ void cpuDeepSleep(uint32_t msecToWake)
     esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH, ESP_PD_OPTION_ON);
 
 #ifdef BUTTON_PIN
-    // Only GPIOs which are have RTC functionality can be used in this bit map: 0,2,4,12-15,25-27,32-39.
+
-#if SOC_RTCIO_HOLD_SUPPORTED
+#if SOC_PM_SUPPORT_EXT_WAKEUP && !defined(HELTEC_WIRELESS_TRACKER)
-    uint64_t gpioMask = (1ULL << config.device.button_gpio ? config.device.button_gpio : BUTTON_PIN);
+    esp_sleep_enable_ext0_wakeup((gpio_num_t)(1ULL << (config.device.button_gpio ? config.device.button_gpio : BUTTON_PIN)), LOW);
 #endif
 
 #ifdef BUTTON_NEED_PULLUP
     gpio_pullup_en((gpio_num_t)BUTTON_PIN);
 #endif
 
-    // Not needed because both of the current boards have external pullups
-    // FIXME change polarity in hw so we can wake on ANY_HIGH instead - that would allow us to use all three buttons (instead of
-    // just the first) gpio_pullup_en((gpio_num_t)BUTTON_PIN);
-
-#if SOC_PM_SUPPORT_EXT_WAKEUP
-    esp_sleep_enable_ext1_wakeup(gpioMask, ESP_EXT1_WAKEUP_ALL_LOW);
-#endif
 #endif
 
     esp_sleep_enable_timer_wakeup(msecToWake * 1000ULL); // call expects usecs

src/platform/nrf52/main-nrf52.cpp

@@ -184,11 +184,17 @@ void cpuDeepSleep(uint32_t msecToWake)
     // FIXME, use non-init RAM per
     // https://devzone.nordicsemi.com/f/nordic-q-a/48919/ram-retention-settings-with-softdevice-enabled
 
+    if (config.device.role == meshtastic_Config_DeviceConfig_Role_TRACKER && config.power.is_power_saving == true) {
+        sd_power_mode_set(NRF_POWER_MODE_LOWPWR);
+        delay(msecToWake);
+        NVIC_SystemReset();
+    } else {
         auto ok = sd_power_system_off();
         if (ok != NRF_SUCCESS) {
             LOG_ERROR("FIXME: Ignoring soft device (EasyDMA pending?) and forcing system-off!\n");
             NRF_POWER->SYSTEMOFF = 1;
         }
+    }
 
     // The following code should not be run, because we are off
     while (1) {

src/sleep.cpp

@@ -135,8 +135,9 @@ bool doPreflightSleep()
 }
 
 /// Tell devices we are going to sleep and wait for them to handle things
-static void waitEnterSleep()
+static void waitEnterSleep(bool skipPreflight = false)
 {
+    if (!skipPreflight) {
         uint32_t now = millis();
         while (!doPreflightSleep()) {
             delay(100); // Kinda yucky - wait until radio says say we can shutdown (finished in process sends/receives)
@@ -147,6 +148,7 @@ static void waitEnterSleep()
                 break;
             }
         }
+    }
 
     // Code that still needs to be moved into notifyObservers
     console->flush();          // send all our characters before we stop cpu clock
@@ -155,7 +157,7 @@ static void waitEnterSleep()
     notifySleep.notifyObservers(NULL);
 }
 
-void doDeepSleep(uint32_t msecToWake)
+void doDeepSleep(uint32_t msecToWake, bool skipPreflight = false)
 {
     if (INCLUDE_vTaskSuspend && (msecToWake == portMAX_DELAY)) {
         LOG_INFO("Entering deep sleep forever\n");
@@ -165,7 +167,7 @@ void doDeepSleep(uint32_t msecToWake)
 
     // not using wifi yet, but once we are this is needed to shutoff the radio hw
     // esp_wifi_stop();
-    waitEnterSleep();
+    waitEnterSleep(skipPreflight);
     notifyDeepSleep.notifyObservers(NULL);
 
     screen->doDeepSleep(); // datasheet says this will draw only 10ua
@@ -227,7 +229,7 @@ esp_sleep_wakeup_cause_t doLightSleep(uint64_t sleepMsec) // FIXME, use a more r
 {
     // LOG_DEBUG("Enter light sleep\n");
 
-    waitEnterSleep();
+    waitEnterSleep(false);
 
     uint64_t sleepUsec = sleepMsec * 1000LL;
 

src/sleep.h

@@ -4,7 +4,7 @@
 #include "Observer.h"
 #include "configuration.h"
 
-void doDeepSleep(uint32_t msecToWake), cpuDeepSleep(uint32_t msecToWake);
+void doDeepSleep(uint32_t msecToWake, bool skipPreflight), cpuDeepSleep(uint32_t msecToWake);
 
 #ifdef ARCH_ESP32
 #include "esp_sleep.h"