Increasing font size of the time display; changing time to 12-hour time

main.py

@@ -1,3 +1,4 @@
+import framebuf
 import network
 import ntptime
 import time
@@ -51,21 +52,60 @@ except Exception as e:
 # Disconnect Wi-Fi to conserve power once time is synchronized
 wlan.active(False)
 
+
+def draw_scaled_text(display, text, x, y, scale=2):
+    """
+    Renders text scaled up by an integer factor (scale=2 -> 16x16, scale=3 -> 24x24).
+    Uses a temporary 1-bit FrameBuffer to capture the default 8x8 font.
+    """
+    width = len(text) * 8
+    height = 8
+
+    # 1-bit MONO_HLSB buffer: (width * height) / 8 bytes
+    buf = bytearray((width * height) // 8)
+    fb = framebuf.FrameBuffer(buf, width, height, framebuf.MONO_HLSB)
+
+    # Render string with built-in font into the scratch buffer
+    fb.fill(0)
+    fb.text(text, 0, 0, 1)
+
+    # Read each pixel and draw a (scale x scale) block on the OLED
+    for r in range(height):
+        for c in range(width):
+            if fb.pixel(c, r):
+                display.fill_rect(x + (c * scale), y + (r * scale), scale, scale, 1)
+
+
 # --- 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)
+    year, month, day, hour_24, 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}"
+    # 1. Determine AM/PM and 12-hour format
+    period = "AM" if hour_24 < 12 else "PM"
+    hour_12 = hour_24 % 12
+    if hour_12 == 0:
+        hour_12 = 12
+
+    # Format time without leading zero (or use {:2d} for alignment)
+    time_str = f"{hour_12:2d}:{minute:02d}"  # 5 characters -> 80px at 2x
+    date_str = f"{DAYS[weekday]} {year}-{month:02d}-{day:02d}"  # 14 chars -> 112px
 
     oled.fill(0)
-    # Center-align roughly for 8x8 font
-    oled.text(time_str, 32, 20)
-    oled.text(date_str, 12, 38)
-    oled.show()
 
+    # 2. Draw 2x scaled time (starts at x=14)
+    time_x = 14
+    time_y = 12
+    draw_scaled_text(oled, time_str, x=time_x, y=time_y, scale=2)
+
+    # 3. Draw AM/PM in standard 1x font (aligned with the bottom of the 16px digits)
+    oled.text(period, time_x + (len(time_str) * 16) + 4, time_y + 8)
+
+    # 4. Draw date centered horizontally underneath
+    date_x = (128 - (len(date_str) * 8)) // 2
+    oled.text(date_str, date_x, 42)
+
+    oled.show()
     time.sleep(0.5)