update

RTC/read.py

@@ -38,16 +38,21 @@ def main():
     bus = smbus2.SMBus(1)
     # Try to read RTC time
     rtc_time = read_time(bus)
-    # If RTC is not connected, set default message
-    if rtc_time is None:
-        rtc_time_str = "not connected"
-    else:
-        rtc_time_str = rtc_time.strftime('%Y-%m-%d %H:%M:%S')
-
-     # Get current system time
+    
+    # Get current system time
     system_time = datetime.now() #local
     utc_time = datetime.utcnow() #UTC
 
+    # If RTC is not connected, set default message
+   # Calculate time difference (in seconds) if RTC is connected
+    if rtc_time:
+        rtc_time_str = rtc_time.strftime('%Y-%m-%d %H:%M:%S')
+        time_difference = int((system_utc_time - rtc_time).total_seconds())  # Convert to int
+    else:
+        rtc_time_str = "not connected"
+        time_difference = "N/A"  # Not applicable
+
+
     # Print both times
     #print(f"RTC module Time:    {rtc_time.strftime('%Y-%m-%d %H:%M:%S')}")
     #print(f"Sys local Time:     {system_time.strftime('%Y-%m-%d %H:%M:%S')}")
@@ -57,7 +62,8 @@ def main():
     time_data = {
         "rtc_module_time":rtc_time_str,
         "system_local_time": system_time.strftime('%Y-%m-%d %H:%M:%S'),
-        "system_utc_time": utc_time.strftime('%Y-%m-%d %H:%M:%S')
+        "system_utc_time": utc_time.strftime('%Y-%m-%d %H:%M:%S'),
+        "time_difference_seconds": time_difference
     }
 
     print(json.dumps(time_data, indent=4))