add RTC

RTC/read.py

@@ -0,0 +1,58 @@
+'''
+Script to read time from RTC module
+I2C connection
+Address 0x68
+/usr/bin/python3 /var/www/nebuleair_pro_4g/RTC/read.py
+'''
+import smbus2
+import time
+import json
+from datetime import datetime
+
+
+# DS3231 I2C address
+DS3231_ADDR = 0x68
+
+# Registers for DS3231
+REG_TIME = 0x00
+
+def bcd_to_dec(bcd):
+    return (bcd // 16 * 10) + (bcd % 16)
+
+def read_time(bus):
+    data = bus.read_i2c_block_data(DS3231_ADDR, REG_TIME, 7)
+    seconds = bcd_to_dec(data[0] & 0x7F)
+    minutes = bcd_to_dec(data[1])
+    hours = bcd_to_dec(data[2] & 0x3F)
+    day = bcd_to_dec(data[4])
+    month = bcd_to_dec(data[5])
+    year = bcd_to_dec(data[6]) + 2000
+    return (year, month, day, hours, minutes, seconds)
+
+def main():
+    # Read RTC time
+    bus = smbus2.SMBus(1)
+    year, month, day, hours, minutes, seconds = read_time(bus)
+    rtc_time = datetime(year, month, day, hours, minutes, seconds)
+
+     # Get current system time
+    system_time = datetime.now() #local
+    utc_time = datetime.utcnow() #UTC
+
+    # 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')}")
+    #print(f"Sys UTC Time:       {utc_time.strftime('%Y-%m-%d %H:%M:%S')}")
+
+     # Create JSON output
+    time_data = {
+        "rtc_module_time": rtc_time.strftime('%Y-%m-%d %H:%M:%S'),
+        "system_local_time": system_time.strftime('%Y-%m-%d %H:%M:%S'),
+        "system_utc_time": utc_time.strftime('%Y-%m-%d %H:%M:%S')
+    }
+
+    print(json.dumps(time_data, indent=4))
+
+
+if __name__ == "__main__":
+    main()