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2025-02-21 11:02:21 +01:00
parent cf9e373ea8
commit 105e439199
17 changed files with 477 additions and 12 deletions
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77
RTC/read.py Executable file
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'''
____ _____ ____
| _ \_ _/ ___|
| |_) || || |
| _ < | || |___
|_| \_\|_| \____|
Script to read time from RTC module
I2C connection
Address 0x68
/usr/bin/python3 /var/www/moduleair_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):
"""Try to read and decode time from the RTC module (DS3231)."""
try:
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 datetime(year, month, day, hours, minutes, seconds)
except OSError:
return None # RTC module not connected
def main():
# Read RTC time
bus = smbus2.SMBus(1)
# Try to read RTC time
rtc_time = read_time(bus)
# 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((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')}")
#print(f"Sys UTC Time: {utc_time.strftime('%Y-%m-%d %H:%M:%S')}")
# Create JSON output
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'),
"time_difference_seconds": time_difference
}
print(json.dumps(time_data, indent=4))
if __name__ == "__main__":
main()

90
RTC/save_to_db.py Executable file
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'''
____ _____ ____
| _ \_ _/ ___|
| |_) || || |
| _ < | || |___
|_| \_\|_| \____|
Script to read time from RTC module and save it to DB
I2C connection
Address 0x68
/usr/bin/python3 /var/www/moduleair_pro_4g/RTC/save_to_db.py
'''
import smbus2
import time
import json
from datetime import datetime
import sqlite3
# Connect to (or create if not existent) the database
conn = sqlite3.connect("/var/www/moduleair_pro_4g/sqlite/sensors.db")
cursor = conn.cursor()
# 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):
"""Try to read and decode time from the RTC module (DS3231)."""
try:
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 datetime(year, month, day, hours, minutes, seconds)
except OSError:
return None # RTC module not connected
def main():
# Read RTC time
bus = smbus2.SMBus(1)
# Try to read RTC time
rtc_time = read_time(bus)
# 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((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')}")
#print(f"Sys UTC Time: {utc_time.strftime('%Y-%m-%d %H:%M:%S')}")
# Create JSON output
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'),
"time_difference_seconds": time_difference
}
#print(json.dumps(time_data, indent=4))
cursor.execute("UPDATE timestamp_table SET last_updated = ? WHERE id = 1", (rtc_time_str,))
# Commit and close the connection
conn.commit()
conn.close()
#print("Sensor data saved successfully!")
if __name__ == "__main__":
main()

97
RTC/set_with_NTP.py Executable file
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"""
Script to set the RTC using an NTP server.
RPI needs to be connected to the internet (WIFI).
Requires ntplib and pytz:
sudo pip3 install ntplib pytz --break-system-packages
/usr/bin/python3 /var/www/moduleair_pro_4g/RTC/set_with_NTP.py
"""
import smbus2
import time
from datetime import datetime
import ntplib
import pytz # For timezone handling
# DS3231 I2C address
DS3231_ADDR = 0x68
# Registers for DS3231
REG_TIME = 0x00
def bcd_to_dec(bcd):
"""Convert BCD to decimal."""
return (bcd // 16 * 10) + (bcd % 16)
def dec_to_bcd(dec):
"""Convert decimal to BCD."""
return (dec // 10 * 16) + (dec % 10)
def set_time(bus, year, month, day, hour, minute, second):
"""Set the RTC time."""
# Convert the time to BCD format
second_bcd = dec_to_bcd(second)
minute_bcd = dec_to_bcd(minute)
hour_bcd = dec_to_bcd(hour)
day_bcd = dec_to_bcd(day)
month_bcd = dec_to_bcd(month)
year_bcd = dec_to_bcd(year - 2000) # DS3231 uses year from 2000
# Write time to DS3231
bus.write_i2c_block_data(DS3231_ADDR, REG_TIME, [
second_bcd,
minute_bcd,
hour_bcd,
0x01, # Day of the week (1=Monday, etc.)
day_bcd,
month_bcd,
year_bcd
])
def read_time(bus):
"""Read the RTC time."""
data = bus.read_i2c_block_data(DS3231_ADDR, REG_TIME, 7)
second = bcd_to_dec(data[0] & 0x7F)
minute = bcd_to_dec(data[1])
hour = 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, hour, minute, second)
def get_internet_time():
"""Get the current time from an NTP server."""
ntp_client = ntplib.NTPClient()
response = ntp_client.request('pool.ntp.org')
utc_time = datetime.utcfromtimestamp(response.tx_time)
return utc_time
def main():
bus = smbus2.SMBus(1)
# Get the current time from the RTC
year, month, day, hours, minutes, seconds = read_time(bus)
rtc_time = datetime(year, month, day, hours, minutes, seconds)
# Get current UTC time from an NTP server
try:
internet_utc_time = get_internet_time()
print(f"Time from Internet (UTC) : {internet_utc_time.strftime('%Y-%m-%d %H:%M:%S')}")
except Exception as e:
print(f"Error retrieving time from the internet: {e}")
return
# Print current RTC time
print(f"Actual RTC Time : {rtc_time.strftime('%Y-%m-%d %H:%M:%S')}")
# Set the RTC to UTC time
set_time(bus, internet_utc_time.year, internet_utc_time.month, internet_utc_time.day,
internet_utc_time.hour, internet_utc_time.minute, internet_utc_time.second)
# Read and print the new time from RTC
year, month, day, hour, minute, second = read_time(bus)
rtc_time_new = datetime(year, month, day, hour, minute, second)
print(f"New RTC Time (UTC) : {rtc_time_new.strftime('%Y-%m-%d %H:%M:%S')}")
if __name__ == "__main__":
main()

47
RTC/set_with_browserTime.py Executable file
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"""
Script to set the RTC using the browser time.
/usr/bin/python3 /var/www/moduleair_pro_4g/RTC/set_with_browserTime.py '2024-01-30 12:48:39'
"""
import sys
from datetime import datetime
import smbus2
# DS3231 I2C address
DS3231_ADDR = 0x68
REG_TIME = 0x00
def dec_to_bcd(dec):
"""Convert decimal to BCD."""
return (dec // 10 * 16) + (dec % 10)
def set_rtc(bus, year, month, day, hour, minute, second):
"""Set the RTC time."""
second_bcd = dec_to_bcd(second)
minute_bcd = dec_to_bcd(minute)
hour_bcd = dec_to_bcd(hour)
day_bcd = dec_to_bcd(day)
month_bcd = dec_to_bcd(month)
year_bcd = dec_to_bcd(year - 2000) # RTC stores years since 2000
bus.write_i2c_block_data(DS3231_ADDR, REG_TIME, [
second_bcd, minute_bcd, hour_bcd, 0x01, day_bcd, month_bcd, year_bcd
])
def main():
if len(sys.argv) != 2:
print("Usage: python3 set_rtc.py 'YYYY-MM-DD HH:MM:SS'")
sys.exit(1)
rtc_time_str = sys.argv[1]
rtc_time = datetime.strptime(rtc_time_str, '%Y-%m-%d %H:%M:%S')
bus = smbus2.SMBus(1)
set_rtc(bus, rtc_time.year, rtc_time.month, rtc_time.day,
rtc_time.hour, rtc_time.minute, rtc_time.second)
print(f"RTC updated to: {rtc_time}")
if __name__ == "__main__":
main()