Using the Network Time Protecol (NTP) we can keep track of the actual time using our device and a wireless connection. The function is built into the rtc and time libraries. There are several ways to initialise the time in an rtc object, which can be used inside the time declaration. In this example, we discuss getting the time through WiFi (though you can also use LTE), and reading it out every second. Without our intervention, the time will keep updating. If everything went correctly, it will print a tuple containing: (year, month, day, hour, minute, second, weekday, yearday)
rtc
time
(year, month, day, hour, minute, second, weekday, yearday)
Note: only weekday counts from 0 (Monday) to 6 (Sunday)
from network import WLAN import time import machine wlan = WLAN(mode=WLAN.STA) wlan.connect(ssid="", auth=(WLAN.WPA2, "")) #for the connection details, check your router. while not wlan.isconnected(): machine.idle() print("connected to WiFi") rtc = machine.RTC() rtc.ntp_sync("pool.ntp.org") while not rtc.synced(): machine.idle() print("RTC synced with NTP time") #adjust your local timezone, by default, NTP time will be GMT time.timezone(2*60**2) #we are located at GMT+2, thus 2*60*60 while True: print(time.localtime()) time.sleep(1)
