Create xkcd_daily.py

micropython/examples/inky_frame/inkylauncher/xkcd_daily.py

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+import gc
+import uos
+import machine
+import jpegdec
+import uasyncio
+import sdcard
+from urllib import urequest
+# from picographics import PicoGraphics, DISPLAY_INKY_FRAME as DISPLAY    # 5.7"
+from picographics import PicoGraphics, DISPLAY_INKY_FRAME_4 as DISPLAY  # 4.0"
+# from picographics import PicoGraphics, DISPLAY_INKY_FRAME_7 as DISPLAY  # 7.3"
+
+"""
+xkcd daily
+
+You *must* insert an SD card into Inky Frame!
+We need somewhere to save the jpg for display.
+
+Fetches a pre-processed XKCD daily image from:
+https://pimoroni.github.io/feed2image/xkcd-daily.jpg
+
+See https://xkcd.com/ for more webcomics!
+"""
+
+
+graphics = None  # PicoGraphics(DISPLAY)
+FILENAME = "/sd/xkcd-daily.jpg"
+# In minutes
+UPDATE_INTERVAL = 60 * 4
+
+
+def update():
+    WIDTH, HEIGHT = graphics.get_bounds()
+    ENDPOINT = "https://pimoroni.github.io/feed2image/xkcd-daily.jpg"
+
+    gc.collect()  # We're really gonna need that RAM!
+
+    sd_spi = machine.SPI(0, sck=machine.Pin(18, machine.Pin.OUT), mosi=machine.Pin(19, machine.Pin.OUT), miso=machine.Pin(16, machine.Pin.OUT))
+    sd = sdcard.SDCard(sd_spi, machine.Pin(22))
+    uos.mount(sd, "/sd")
+    gc.collect()  # Claw back some RAM!
+
+
+    url = ENDPOINT
+
+    if (WIDTH, HEIGHT) != (600, 448):
+        url = url.replace("xkcd-", f"xkcd-{WIDTH}x{HEIGHT}-")
+
+    socket = urequest.urlopen(url)
+
+    # Stream the image data from the socket onto disk in 1024 byte chunks
+    # the 600x448-ish jpeg will be roughly ~24k, we really don't have the RAM!
+    data = bytearray(1024)
+    with open(FILENAME, "wb") as f:
+        while True:
+            if socket.readinto(data) == 0:
+                break
+            f.write(data)
+    socket.close()
+    gc.collect()  # We really are tight on RAM!
+
+
+def draw():
+    jpeg = jpegdec.JPEG(graphics)
+    gc.collect()  # For good measure...
+
+    graphics.set_pen(1)
+    graphics.clear()
+
+    jpeg.open_file(FILENAME)
+    jpeg.decode()
+
+    graphics.update()
+
+
+def network_connect():
+    import inky_helper as ih
+    try:
+        from secrets import WIFI_SSID, WIFI_PASSWORD
+        ih.network_connect(WIFI_SSID, WIFI_PASSWORD)
+    except ImportError:
+        print("Create secrets.py with your WiFi credentials")
+
+
+
+if __name__ == "__main__":
+    network_connect()
+    update()
+    draw()