How to synchronize panel time on another timezone than the local one

config/pai.conf.example

@@ -56,6 +56,7 @@ import logging
 # OUTPUT_PULSE_DURATION = 1               # Duration of a PGM pulse in seconds
 # SYNC_TIME = False    			# Update panel time periodically when time drifts more than SYNC_TIME_MIN_DRIFT
 # SYNC_TIME_MIN_DRIFT = 60    	# Minimum time drift in seconds to initiate time sync
+# SYNC_TIME_TIMEZONE=''             # Timezone used for panel time synchronisation. PAI host timezone is used by default
 # PASSWORD = '0000'   			# PC Password. Set to None if Panel has no Password.
 #                                 # In Babyware: Right click on your panel -> Properties -> PC Communication (Babyware) ->
 #                                 # PC Communication (Babyware) Tab.

paradox/config.py

@@ -71,8 +71,9 @@ class Config(object):
         "SYNC_TIME_MIN_DRIFT": (
                 120,
                 int,
-                (60, 0xFFFFFFFF)
+                (120, 0xFFFFFFFF)
         ), # Minimum time drift in seconds to initiate time sync
+        "SYNC_TIME_TIMEZONE": "",  # By default pai uses the same timezone as pai host
         "PASSWORD": (
             None,
             [int, str, bytes, type(None)],
@@ -456,4 +457,4 @@ def get_limits_for_type(elem_type: str, default: list = None):
     if isinstance(limits, str):
         if "auto" in limits:
             return default
-        return string_to_id_list(limits)
+        return string_to_id_list(limits)

paradox/paradox.py

@@ -3,6 +3,7 @@
 import asyncio
 import logging
 import time
+import pytz
 from binascii import hexlify
 from datetime import datetime
 from typing import Callable, Iterable, Optional, Sequence
@@ -244,18 +245,28 @@ async def dump_memory(self, file, memory_type):
             )
 
     async def sync_time(self):
-        logger.debug("Synchronizing panel time")
+        now = datetime.now().astimezone()
+        if cfg.SYNC_TIME_TIMEZONE:
+            try:
+                tzinfo = pytz.timezone(cfg.SYNC_TIME_TIMEZONE)
+                now = now.astimezone(tzinfo)
+            except pytz.exceptions.UnknownTimeZoneError:
+                logger.debug(f"Panel Timezone Unknown ('{cfg.SYNC_TIME_TIMEZONE}'). Skipping sync")
+                return
+
+        if not self._is_time_sync_required(now.replace(tzinfo=None)):
+            return
 
-        now = time.localtime()
         args = dict(
-            century=int(now.tm_year / 100),
-            year=int(now.tm_year % 100),
-            month=now.tm_mon,
-            day=now.tm_mday,
-            hour=now.tm_hour,
-            minute=now.tm_min,
+            century=int(now.year / 100),
+            year=int(now.year % 100),
+            month=now.month,
+            day=now.day,
+            hour=now.hour,
+            minute=now.minute,
         )
 
+        logger.debug("Synchronizing panel time")
         reply = await self.send_wait(
             self.panel.get_message("SetTimeDate"), args, reply_expected=0x03, timeout=10
         )
@@ -713,8 +724,7 @@ def _on_status_update(self, status):
         self._update_partition_states()
 
         if cfg.SYNC_TIME:
-            if self._check_if_time_sync_required():
-                self.work_loop.create_task(self.sync_time())
+            self.work_loop.create_task(self.sync_time())
 
     def _process_trouble_statuses(self, trouble_statuses):
         global_trouble = False
@@ -733,20 +743,21 @@ def _process_trouble_statuses(self, trouble_statuses):
             "system", "troubles", {"trouble": global_trouble}
         )
 
-    def _check_if_time_sync_required(self):
+    def _is_time_sync_required(self, now) -> bool:
+        assert now.tzinfo is None
         try:
-            drift = (
-                datetime.now() - self.storage.get_container("system")["date"]["time"]
-            ).total_seconds()
+           drift = (now - self.storage.get_container("system")["date"]["time"]).total_seconds()
 
-            if abs(drift) > cfg.SYNC_TIME_MIN_DRIFT:
-                logger.info(f"Time drifted more than allowed: {drift} seconds")
-                return True
-            else:
-                logger.debug(f"Time drifted within allowed range: {drift} seconds")
+           if abs(drift) > cfg.SYNC_TIME_MIN_DRIFT:
+              logger.info(f"Time drifted more than allowed: {drift} seconds")
+              return True
+           else:
+              logger.debug(f"Time drifted within allowed range: {drift} seconds")
 
         except KeyError:
-            return False
+            pass
+
+        return False
 
     def _update_partition_states(self):
         """

requirements.txt

@@ -5,6 +5,7 @@ require-python-3
 construct~=2.9.43
 argparse>=1.4.0
 python-slugify>=4.0.1
+pytz>=2021.3
 #
 # Optional
 #