Added RTC offset calculation to return absolute time

MultiNode/Configurator.py

@@ -31,7 +31,7 @@ jitter = int.from_bytes(config[17:21], byteorder="little")
 pointers = list(config[21 : 21 + n_devices])
 
 modem_frequency = 868.0
-modem_power = 0
+modem_power = 2
 client_address = 0x1234
 server_address = 0x0001
 
@@ -90,4 +90,4 @@ client_key = 0x0#0x7ed64cce5b5d8e85
 port.write(b"k")
 port.write(struct.pack("<QQ", client_key, server_key))
 
-#port.write(b"s")
+port.write(b"s")

MultiNode/MNLib.cpp

@@ -13,13 +13,11 @@ bool _is_client;
 uint8_t configuration_memory[CFGMEM];
 DeviceBase* devices[N_DEVICES];
 uint32_t last_server_message_id = 0;
+uint32_t rtc_offset = 0;
 
 //void init_mn(bool is_client = true)
 void initMN()
 {
-  if (batteryVoltage() < 3.5 && !USBDevice.connected()) // Shut off below this voltage, down to 3.1 V should be OK if the regulator has a dropout of 400 mV and conducts fully if its output is below 3.3 V
-    LowPower.deepSleep();
-    
   //_is_client = is_client;
 
   EEPROM.setCommitASAP(false); // Don't unnecessarily write to the EEPROM
@@ -95,6 +93,9 @@ void initMN()
 
   initializeDevices();
   initRTC();
+
+  if (batteryVoltage() < 3.5 && !USBDevice.connected()) // Shut off below this voltage, down to 3.1 V should be OK if the regulator has a dropout of 400 mV and conducts fully if its output is below 3.3 V
+    LowPower.deepSleep();
 }
 
 void test()
@@ -306,8 +307,11 @@ bool receive()
         switch (message_type)
         {
           case MT_Time:
+            rtc_offset = server_message_id - RTC->MODE1.COUNT.reg;
+          
             if (server_message_id > message_id) // Ensure that IDs are sequential
               message_id = server_message_id;
+
             return true;
             break;
         }
@@ -444,5 +448,5 @@ void initRTC() // https://github.com/arduino-libraries/RTCZero/blob/master/src/R
 
 uint32_t getRTC()
 {
-  return RTC->MODE1.COUNT.reg;
+  return RTC->MODE1.COUNT.reg + rtc_offset;
 }

MultiNode/MultiNode.ino

@@ -75,8 +75,8 @@ void loop()
         SerialUSB.print("Battery voltage: ");
         SerialUSB.println(batteryVoltage());
 
-        SerialUSB.print("RTC time: ");
-        SerialUSB.println(RTC->MODE1.COUNT.reg);
+        SerialUSB.print("RTC + offset time: ");
+        SerialUSB.println(getRTC());
         SerialUSB.println("END");
         break;
 
@@ -155,7 +155,7 @@ void loop()
   long next_tick_sensors_dt = next_tick_sensors - now_time;
   long min_delay = min(next_tick_device_dt, next_tick_sensors_dt);
   
-  if (min_delay > 1000 && !USBDevice.connected())
+  if (min_delay > 1000 && !USBDevice.connected() && message_id > 1000000000) // Listen until the time is initialized
   {
     power_sleep(min_delay);
     offset += min_delay;
@@ -170,5 +170,4 @@ void power_sleep(uint32_t milliseconds)
   setLoopPower(OFF);
   LowPower.sleep(milliseconds);
   radio.setModeIdle();
-  delay(100);
 }