timemanager fixes

include/globals.h

@@ -114,7 +114,7 @@ extern SemaphoreHandle_t I2Caccess, TimePulse;
 extern TaskHandle_t irqHandlerTask, ClockTask;
 extern TimerHandle_t WifiChanTimer;
 extern Timezone myTZ;
-extern time_t LastSyncTime, userUTCTime;
+extern time_t lastSyncTime, userUTCTime;
 
 // application includes
 #include "led.h"

include/timemanager.h

@@ -20,7 +20,6 @@ void clock_loop(void *pvParameters);
 void time_sync(void);
 int wait_for_pulse(void);
 int syncTime(time_t const t, uint8_t const timesource);
-int syncTime(uint32_t const t, uint8_t const timesource);
 void IRAM_ATTR CLOCKIRQ(void);
 int timepulse_init(void);
 void timepulse_start(void);

src/if482.cpp

@@ -89,16 +89,19 @@ HardwareSerial IF482(2); // use UART #2 (note: #1 may be in use for serial GPS)
 // triggered by timepulse to ticker out DCF signal
 void IF482_Pulse(time_t t) {
 
+  static const TickType_t txDelay =
+      pdMS_TO_TICKS(IF482_PULSE_LENGTH) - tx_Ticks(HAS_IF482);
+
   TickType_t startTime = xTaskGetTickCount();
-  static const TickType_t txDelay = pdMS_TO_TICKS(IF482_PULSE_LENGTH) - tx_Ticks(HAS_IF482);
-  vTaskDelayUntil(&startTime, txDelay);
-  IF482.print(IF482_Frame(t+1)); // note: if482 telegram for *next* second
+
+  vTaskDelayUntil(&startTime, txDelay); // wait until moment to fire
+  IF482.print(IF482_Frame(t + 1)); // note: if482 telegram for *next* second
 }
 
 String IRAM_ATTR IF482_Frame(time_t startTime) {
 
   time_t t = myTZ.toLocal(startTime);
-  char mon, buf[14], out[IF482_FRAME_SIZE];
+  char mon, out[IF482_FRAME_SIZE];
 
   switch (timeStatus()) { // indicates if time has been set and recently synced
   case timeSet:           // time is set and is synced
@@ -113,9 +116,10 @@ String IRAM_ATTR IF482_Frame(time_t startTime) {
   } // switch
 
   // generate IF482 telegram
-  snprintf(buf, sizeof(buf), "%02u%02u%02u%1u%02u%02u%02u", year(t) - 2000,
-           month(t), day(t), weekday(t), hour(t), minute(t), second(t));
-  snprintf(out, sizeof(out), "O%cL%s\r", mon, buf);
+  snprintf(out, sizeof(out), "O%cL%02u%02u%02u%1u%02u%02u%02u\r", mon,
+           year(t) - 2000, month(t), day(t), weekday(t), hour(t), minute(t),
+           second(t));
+
   ESP_LOGD(TAG, "IF482 = %s", out);
   return out;
 }
@@ -124,13 +128,13 @@ String IRAM_ATTR IF482_Frame(time_t startTime) {
 TickType_t tx_Ticks(unsigned long baud, uint32_t config, int8_t rxPin,
                     int8_t txPins) {
 
-  uint32_t datenbits = ((config & 0x0c) >> 2) + 5;
+  uint32_t databits = ((config & 0x0c) >> 2) + 5;
   uint32_t stopbits = ((config & 0x20) >> 5) + 1;
-  uint32_t tx_delay =
-      (2 + datenbits + stopbits) * IF482_FRAME_SIZE * 1000.0 / baud;
+  uint32_t txTime =
+      (databits + stopbits + 2) * IF482_FRAME_SIZE * 1000.0 / baud;
   // +2 ms margin for the startbit and the clock's processing time
 
-  return pdMS_TO_TICKS(round(tx_delay));
+  return pdMS_TO_TICKS(round(txTime));
 }
 
 #endif // HAS_IF482

src/lorawan.cpp

@@ -443,7 +443,7 @@ void user_request_network_time_callback(void *pVoidUserUTCTime,
                                         int flagSuccess) {
 #ifdef HAS_LORA
   // Explicit conversion from void* to uint32_t* to avoid compiler errors
-  uint32_t *pUserUTCTime = (uint32_t *)pVoidUserUTCTime;
+  time_t *pUserUTCTime = (time_t *)pVoidUserUTCTime;
   lmic_time_reference_t lmicTimeReference;
 
   if (flagSuccess != 1) {
@@ -468,11 +468,11 @@ void user_request_network_time_callback(void *pVoidUserUTCTime,
   ostime_t ticksRequestSent = lmicTimeReference.tLocal;
   // Add the delay between the instant the time was transmitted and
   // the current time
-  uint32_t requestDelaySec = osticks2ms(ticksNow - ticksRequestSent) / 1000;
+  time_t requestDelaySec = osticks2ms(ticksNow - ticksRequestSent) / 1000;
   *pUserUTCTime += requestDelaySec;
 
   // Update system time with time read from the network
-  if (syncTime(*pUserUTCTime, lora)) { // do we have a valid time?
+  if (syncTime(*pUserUTCTime, lora)) { // have we got a valid time?
 #ifdef HAS_RTC
     if (TimeIsSynced)
       set_rtctime(now()); // UTC time

src/main.cpp

@@ -72,7 +72,7 @@ TaskHandle_t irqHandlerTask, ClockTask;
 SemaphoreHandle_t I2Caccess, TimePulse;
 bool volatile TimePulseTick = false;
 bool TimeIsSynced = false;
-time_t LastSyncTime = 0, userUTCTime = 0;
+time_t lastSyncTime = 0, userUTCTime = 0;
 
 // container holding unique MAC address hashes with Memory Alloctor using PSRAM,
 // if present

src/timemanager.cpp

@@ -9,13 +9,17 @@ void time_sync() {
 
 #ifdef TIME_SYNC_INTERVAL
 
-  time_t lastTimeSync = now() - LastSyncTime; // check if a sync is due
+  static time_t ageOfTime = 0;
+
+  ageOfTime = now() - lastSyncTime; // check if a sync is due
+
+  // is it time to sync with external source or did we never sync yet?
+  if ((ageOfTime >= (TIME_SYNC_INTERVAL * 60000)) || !lastSyncTime) {
 
-  if ((lastTimeSync >= (TIME_SYNC_INTERVAL * 60000)) || !LastSyncTime) {
-    // is it time to sync with external source?
 #ifdef HAS_GPS
-    if (syncTime(get_gpstime(), pps)) // attempt sync with GPS time
+    syncTime(get_gpstime(), pps); // attempt sync with GPS time
 #endif
+
 #if defined HAS_LORA && defined TIME_SYNC_LORA
     if (!TimeIsSynced) // no GPS sync -> try lora sync
       LMIC_requestNetworkTime(user_request_network_time_callback,
@@ -27,9 +31,10 @@ void time_sync() {
   if (TimeIsSynced) { // recalibrate RTC, if we have one
     set_rtctime(now());
   } else { // we switch to fallback time after a while
-    if ((lastTimeSync >= (TIME_SYNC_TIMEOUT * 60000)) ||
-        !LastSyncTime) { // sync is still due -> use RTC as fallback source
-      if (syncTime(get_rtctime(), rtc)) // sync with RTC time
+    if ((ageOfTime >= (TIME_SYNC_TIMEOUT * 60000)) ||
+        !lastSyncTime) { // sync is still due -> use RTC as fallback source
+      if (!syncTime(get_rtctime(), rtc)) // sync with RTC time
+        ESP_LOGW(TAG, "no valid time");
       TimeIsSynced = false;
     }
   }
@@ -42,30 +47,26 @@ void time_sync() {
 int syncTime(time_t const t, uint8_t const timesource) {
 
   // symbol to display current time source
-  const char timeSetSymbols[] = {'G', 'R', 'L', '~' };
+  const char timeSetSymbols[] = {'G', 'R', 'L', '~'};
 
   if (TimeIsValid(t)) {
     TimeIsSynced = wait_for_pulse(); // wait for next 1pps timepulse
     setTime(t);
     adjustTime(1);        // forward time to next second
-    LastSyncTime = now(); // store time of this sync
+    lastSyncTime = now(); // store time of this sync
     timeSource = timeSetSymbols[timesource];
-    ESP_LOGD(TAG, "Time was set to %02d:%02d:%02d", hour(t), minute(t),
-             second(t));
+    ESP_LOGD(TAG, "Time source %c set time to %02d:%02d:%02d", timeSource,
+             hour(t), minute(t), second(t));
     return 1; // success
   } else {
-    ESP_LOGD(TAG, "Time sync attempt failed");
     timeSource = timeSetSymbols[unsynced];
     TimeIsSynced = false;
+    ESP_LOGD(TAG, "Time source %c sync attempt failed", timeSource);
     return 0;
   }
   // failure
 }
 
-int syncTime(uint32_t const t, uint8_t const timesource) { // t is UTC time in seconds epoch
-  return syncTime(static_cast<time_t>(t), timesource);
-}
-
 // helper function to sync moment on timepulse
 int wait_for_pulse(void) {
   // sync on top of next second with 1pps timepulse
@@ -153,8 +154,8 @@ time_t compiledUTC(void) {
 }
 
 // helper function to convert gps date/time into time_t
-time_t tmConvert(uint16_t YYYY, uint8_t MM, uint8_t DD, uint8_t hh,
-                   uint8_t mm, uint8_t ss) {
+time_t tmConvert(uint16_t YYYY, uint8_t MM, uint8_t DD, uint8_t hh, uint8_t mm,
+                 uint8_t ss) {
   tmElements_t tm;
   tm.Year = CalendarYrToTm(YYYY); // year offset from 1970 in time.h
   tm.Month = MM;