sleep for a very long time, because the lorawan32 board doesn't have an off switch

TODO.md

@@ -18,7 +18,7 @@
 * use a freertos thread to remain blocked reading from recvfromAckTimeout, so that we don't need to keep polling it from our main thread
 * override peekAtMessage so we can see any messages that pass through our node (even if not broadcast)?  would that be useful?
 * sendToMesh can currently block for a long time, instead have it just queue a packet for a radio freertos thread
-
+* see section 7.3 of https://cdn.sparkfun.com/assets/learn_tutorials/8/0/4/RFM95_96_97_98W.pdf and have hope radio wake only when a valid packet is received.  Possibly even wake the ESP32 from deep sleep via GPIO.
 * fix the logo
 
 # Pre-beta priority

src/MeshRadio.h

@@ -22,6 +22,9 @@ public:
 
     bool init();
 
+    /// Prepare the radio to enter sleep mode, where it should draw only 0.2 uA
+    void sleep() { rf95.sleep(); }
+
     /// Send a packet - the current implementation blocks for a while possibly (FIXME)
     ErrorCode sendTo(NodeNum dest, const uint8_t *buf, size_t len);
 

src/configuration.h

@@ -42,7 +42,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define DEBUG_PORT              Serial      // Serial debug port
 #define SERIAL_BAUD             115200      // Serial debug baud rate
-#define SLEEP_MSECS             (5 * 60 * 1000) // Sleep for these many millis (or a button press or a lora msg?)
+#define SLEEP_MSECS             (24 * 60 * 60 * 1000) // Sleep for these many millis (or a button press or a lora msg?)
 #define MESSAGE_TO_SLEEP_DELAY  5000        // Time after message before going to sleep
 #define LOGO_DELAY              5000        // Time to show logo on first boot
 #define REQUIRE_RADIO           true        // If true, we will fail to start if the radio is not found
@@ -129,9 +129,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define BUTTON_PIN      0
 
 #define RESET_GPIO      14
-#define DIO0_GPIO       34
+#define DIO0_GPIO       26
 #define DIO1_GPIO       35 
-#define DIO2_GPIO       32 // Note: not really used on this board
+#define DIO2_GPIO       34 
 #endif
 
 

src/main.ino

@@ -60,6 +60,9 @@ void doDeepSleep(uint64_t msecToWake)
 
   // FIXME, shutdown radiohead interrupts before powering off device
 
+  // Put radio in sleep mode (will still draw power but only 0.2uA)
+  radio.sleep();
+
 #ifdef T_BEAM_V10
   if (axp192_found)
   {
@@ -345,19 +348,14 @@ void loop()
   }
 #endif
 
-  // Send every SEND_INTERVAL millis
-  static uint32_t last = 0;
-  if (true)
-  {
 #ifdef MINWAKE_MSECS
-      if (millis() > MINWAKE_MSECS)
-      {
-        sleep();
-      }
+  if (millis() > MINWAKE_MSECS)
+  {
+    sleep();
+  }
 #endif
 
-      // No GPS lock yet, let the OS put the main CPU in low power mode for 100ms (or until another interrupt comes in)
-      // i.e. don't just keep spinning in loop as fast as we can.
-      delay(100);
-    }
+  // No GPS lock yet, let the OS put the main CPU in low power mode for 100ms (or until another interrupt comes in)
+  // i.e. don't just keep spinning in loop as fast as we can.
+  delay(100);
 }