MicroPython - ESP32 WiFi NTP 사용하기

main.py

from network import WLAN, STA_IF
from time import time
from machine import SoftI2C, Pin, RTC, Timer
from ssd1306 import SSD1306_I2C
import ntptime

SERVER = 'broker.mqttdashboard.com'
PORT = 1883
CLIENT_ID = 'esp32'
TOPIC = 'devicemart'

week = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
# MON ~ SUN : 0 ~ 6
time_pads = ['', '', '']

i2c = SoftI2C(sda=Pin(13), scl=Pin(14))
display = SSD1306_I2C(128, 64, i2c, addr=0x3C)
rtc = RTC()

wlan = WLAN(STA_IF)
wlan.active(True)
start_time = time()

if not wlan.isconnected():
    print('Connecting to network...')
    wlan.connect('devicemart', 'devicemart1')
    
    while not wlan.isconnected():
        if time() - start_time > 15:
            print('Connecting WiFi Timeout!')
            quit()
        
config = wlan.ifconfig()
print(config)

ntptime.settime()

def on_timeout(_):
    datetime = rtc.datetime()
    
    display.fill(0)
    display.text('DeviceMart', 0, 0)
    display.text('RTC Clock', 0, 15)
    
    display.text(
        str(datetime[0]) +
        '-' +
        str(datetime[1]) +
        '-' +
        str(datetime[2]) +
        ' ' +
        week[datetime[3]],
        0,
        40
    )
    
    for i in range(4, 7): # 4 ~ 6 : Hours Mins Secs
        if datetime[i] < 10:
            time_pads[i - 4] = '0'
        else:
            time_pads[i - 4] = ''
            
    display.text(
        time_pads[0] +
        str(datetime[4]) +
        ':' +
        time_pads[1] +
        str(datetime[5]) +
        ':' +
        time_pads[2] +
        str(datetime[6]),
        0,
        55
    )
    display.show()

timer = Timer(-1)
timer.init(period=300, mode=Timer.PERIODIC, callback=on_timeout)