example switches between rgb565 and jpeg modes

circuitpython-esp32-camera/esp32-s3-eye-adafruitio-and-lcd/code.py

@@ -0,0 +1,96 @@
+# SPDX-FileCopyrightText: Copyright (c) 2021 Jeff Epler for Adafruit Industries
+#
+# SPDX-License-Identifier: Unlicense
+
+"""
+Show the live camera image on the viewfinder, then upload to adafruit IO when the 'BOOT' button is pressed.
+"""
+
+import esp32_camera
+from terminalio import FONT
+import board
+import displayio
+import busio
+import struct
+import adafruit_requests
+import wifi
+import ssl
+import socketpool
+import keypad
+import board
+import dotenv
+import binascii
+
+shutter_button = keypad.Keys((board.BOOT,), value_when_pressed=False)
+
+aio_username = dotenv.get_key("/.env", "AIO_USERNAME")
+aio_key = dotenv.get_key("/.env", "AIO_KEY")
+
+image_feed = "image"
+
+pool = socketpool.SocketPool(wifi.radio)
+
+import adafruit_minimqtt.adafruit_minimqtt as MQTT
+from adafruit_io.adafruit_io import IO_MQTT
+
+print("Connecting to Adafruit IO")
+mqtt_client = MQTT.MQTT(
+    broker="io.adafruit.com",
+    username=aio_username,
+    password=aio_key,
+    socket_pool=pool,
+    ssl_context=ssl.create_default_context(),
+)
+mqtt_client.connect()
+io = IO_MQTT(mqtt_client)
+
+
+print("Initializing camera")
+cam = esp32_camera.Camera(
+    data_pins=board.CAMERA_DATA,
+    external_clock_pin=board.CAMERA_XCLK,
+    pixel_clock_pin=board.CAMERA_PCLK,
+    vsync_pin=board.CAMERA_VSYNC,
+    href_pin=board.CAMERA_HREF,
+    pixel_format=esp32_camera.PixelFormat.RGB565,
+    frame_size=esp32_camera.FrameSize.R240X240,
+    i2c=board.I2C(),
+    external_clock_frequency=20_000_000,
+    framebuffer_count=2,
+)
+cam.vflip = True
+cam.hmirror = True
+
+board.DISPLAY.auto_refresh = False
+display_bus = board.DISPLAY.bus
+
+print(cam.width, cam.height)
+
+ow = (board.DISPLAY.width - cam.width) // 2
+oh = (board.DISPLAY.height - cam.height) // 2
+display_bus.send(42, struct.pack(">hh", ow, cam.width + ow - 1))
+display_bus.send(43, struct.pack(">hh", oh, cam.height + ow - 1))
+
+while True:
+    frame = cam.take(1)
+    display_bus.send(44, frame)
+    if (ev := shutter_button.events.get()) and ev.pressed:
+        cam.reconfigure(
+            pixel_format=esp32_camera.PixelFormat.JPEG,
+            frame_size=esp32_camera.FrameSize.SVGA,
+        )
+        frame = cam.take(1)
+        if isinstance(frame, memoryview):
+            jpeg = frame
+            print(f"Captured {len(jpeg)} bytes of jpeg data")
+
+            # b2a_base64() appends a trailing newline, which IO does not like
+            encoded_data = binascii.b2a_base64(jpeg).strip()
+            print(f"Expanded to {len(encoded_data)} for IO upload")
+
+            io.publish("image", encoded_data)
+        cam.reconfigure(
+            pixel_format=esp32_camera.PixelFormat.RGB565,
+            frame_size=esp32_camera.FrameSize.R240X240,
+        )
+    print(end=".")