Power saving sensor (#2865)

* Trunk

* Again

* This thing just keeps updating itself

* Ignore tools

* Sleepy sensor

* Batrunkadunk

src/modules/Telemetry/EnvironmentTelemetry.cpp

@@ -8,6 +8,8 @@
 #include "configuration.h"
 #include "main.h"
 #include "power.h"
+#include "sleep.h"
+#include "target_specific.h"
 #include <OLEDDisplay.h>
 #include <OLEDDisplayUi.h>
 
@@ -51,6 +53,13 @@ SHT31Sensor sht31Sensor;
 
 int32_t EnvironmentTelemetryModule::runOnce()
 {
+    if (sleepOnNextExecution == true) {
+        sleepOnNextExecution = false;
+        uint32_t nightyNightMs = getConfiguredOrDefaultMs(moduleConfig.telemetry.environment_update_interval);
+        LOG_DEBUG("Sleeping for %ims, then awaking to send metrics again.\n", nightyNightMs);
+        doDeepSleep(nightyNightMs, true);
+    }
+
     uint32_t result = UINT32_MAX;
     /*
         Uncomment the preferences below if you want to use the module
@@ -266,6 +275,12 @@ bool EnvironmentTelemetryModule::sendTelemetry(NodeNum dest, bool phoneOnly)
         } else {
             LOG_INFO("Sending packet to mesh\n");
             service.sendToMesh(p, RX_SRC_LOCAL, true);
+
+            if (config.device.role == meshtastic_Config_DeviceConfig_Role_SENSOR && config.power.is_power_saving) {
+                LOG_DEBUG("Starting next execution in 5 seconds and then going to sleep.\n");
+                sleepOnNextExecution = true;
+                setIntervalFromNow(5000);
+            }
         }
     }
     return valid;