Made working app; updated README with instructions on how to flash

main.py

@@ -0,0 +1,71 @@
+import network
+import ntptime
+import time
+from machine import Pin, I2C
+import ssd1306
+
+# --- Configuration ---
+try:
+    import config as Config
+except ImportError:
+    print("ERROR: config.py not found.")
+    print("Create config.py on the device with your Wi-Fi and NTP settings.")
+    while True:
+        time.sleep(2)
+
+# --- Hardware Setup ---
+i2c = I2C(0, sda=Pin(16), scl=Pin(17), freq=400000)
+oled = ssd1306.SSD1306_I2C(128, 64, i2c)
+
+
+def display_message(line1, line2=""):
+    oled.fill(0)
+    oled.text(line1, 0, 16)
+    oled.text(line2, 0, 32)
+    oled.show()
+
+
+# --- Wi-Fi Connection ---
+display_message("Connecting to", "Wi-Fi...")
+wlan = network.WLAN(network.STA_IF)
+wlan.active(True)
+wlan.connect(Config.WIFI_SSID, Config.WIFI_PASSWORD)
+
+timeout = 20
+while not wlan.isconnected() and timeout > 0:
+    time.sleep(1)
+    timeout -= 1
+
+if not wlan.isconnected():
+    display_message("Wi-Fi Error", "Check settings")
+    raise RuntimeError("Failed to connect to Wi-Fi")
+
+# --- NTP Synchronization ---
+display_message("Syncing time...", "NTP server")
+try:
+    ntptime.settime()  # Sets the Pico internal RTC to UTC
+except Exception as e:
+    display_message("NTP Failed", str(e))
+    time.sleep(3)
+
+# Disconnect Wi-Fi to conserve power once time is synchronized
+wlan.active(False)
+
+# --- Main Loop ---
+DAYS = ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"]
+
+while True:
+    # Apply UTC offset to local epoch
+    local_epoch = time.time() + (Config.UTC_OFFSET * 3600)
+    year, month, day, hour, minute, second, weekday, _ = time.localtime(local_epoch)
+
+    time_str = f"{hour:02d}:{minute:02d}:{second:02d}"
+    date_str = f"{DAYS[weekday]} {year}-{month:02d}-{day:02d}"
+
+    oled.fill(0)
+    # Center-align roughly for 8x8 font
+    oled.text(time_str, 32, 20)
+    oled.text(date_str, 12, 38)
+    oled.show()
+
+    time.sleep(0.5)