Merge branch 'master' into swap_hid_api

Author: tannewt

CPB_Magic_Light_Mixer/cpb_magic_light_mixer.py

@@ -0,0 +1,93 @@
+# Magic Light Bulb remote color mixer
+# Sends RGB color values, read from three faders on CPB to the bulb
+# https://www.magiclightbulbs.com/collections/bluetooth-bulbs
+
+import adafruit_ble
+from adafruit_ble.advertising.standard import ProvideServicesAdvertisement
+from adafruit_ble_magic_light import MagicLightService
+import _bleio
+import board
+from analogio import AnalogIn
+from adafruit_circuitplayground import cp
+
+
+def find_connection():
+    for connection in radio.connections:
+        if MagicLightService not in connection:  # Filter services
+            continue
+        return connection, connection[MagicLightService]
+    return None, None
+
+radio = adafruit_ble.BLERadio()
+
+
+def scale(value):
+    # Scale a value from 0-65535 (AnalogIn range) to 0-255 (RGB range)
+    return int(value / 65535 * 255)
+a4 = AnalogIn(board.A4)  # red slider
+a5 = AnalogIn(board.A5)  # green slider
+a6 = AnalogIn(board.A6)  # blue slider
+
+cp.pixels.brightness = 0.1
+dimmer = 1.0
+
+active_connection, bulb = find_connection()  # In case already connected
+
+while True:
+    if not active_connection:  # There's no connection, so let's scan for one
+        cp.pixels[0] = (60, 40, 0)  # set CPB NeoPixel 0 to yellow while searching
+        print("Scanning for Magic Light...")
+        # Scan and filter for advertisements with ProvideServicesAdvertiesment type
+        for advertisement in radio.start_scan(ProvideServicesAdvertisement):
+            # Filter further for advertisements with MagicLightService
+            if MagicLightService in advertisement.services:
+                active_connection = radio.connect(advertisement)
+                print("Connected to Magic Light")
+                cp.pixels[0] = (0, 0, 255)  # Set NeoPixel 0 to blue when connected
+                # Play a happy tone
+                cp.play_tone(440, 0.1)
+                cp.play_tone(880, 0.1)
+                print("Adjust slide potentiometers to mix RGB colors")
+                try:
+                    bulb = active_connection[MagicLightService]
+                except _bleio.ConnectionError:
+                    print("disconnected")
+                    continue
+                break
+        radio.stop_scan()  # Now that we're connected, stop scanning
+
+    while active_connection.connected:  # Connected, now we can set attrs to change colors
+        # Toggle slide switch to go to half or full brightness
+        if cp.switch:
+            cp.red_led = True
+            dimmer = 0.5
+        else:
+            cp.red_led = False
+            dimmer = 1.0
+
+        # Press the 'A' button to momentarily black the bulb
+        if cp.button_a:
+            dimmer = 0.0
+
+        r = scale(a4.value * dimmer)
+        g = scale(a5.value * dimmer)
+        b = scale(a6.value * dimmer)
+
+        # Press the 'B' button to momentarily white the bulb
+        if cp.button_b:
+            r, g, b = (255, 255, 255)
+
+        color = (r, g, b)
+
+        try:
+            bulb[0] = color  # Send color to bulb's color characteristic
+        except _bleio.ConnectionError:
+            print("disconnected")
+            continue
+        cp.pixels[2] = (r, 0, 0)
+        cp.pixels[3] = (0, g, 0)
+        cp.pixels[4] = (0, 0, b)
+        cp.pixels[7] = (color)
+
+    active_connection = None  # Not connected, start scanning again
+    cp.pixels[0] = (60, 40, 0)