Merge remote-tracking branch 'adafruit/master'

Author: dastels

Adafruit_STEMMA_Relay/Adafruit_STEMMA_Relay.py

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+import time
+import board
+import digitalio
+
+relay = digitalio.DigitalInOut(board.A1)
+relay.direction = digitalio.Direction.OUTPUT
+
+while True:
+    relay.value = True
+    time.sleep(1)
+    relay.value = False
+    time.sleep(1)

BLE_Client_Server/Eagle/CP_Solenoid3.brd

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+# Adafruit Learning System tutorial - A CircuitPython BLE Client & Server
+
+Use Bluetooth to turn a server on and off and actively sense the server's status light
+
+Follow the Adafruit learn guide here: https://learn.adafruit.com/circuitpython-ble-client-server/
+
+Adafruit invests time and resources providing this open source code,
+please support Adafruit and open-source hardware by purchasing
+products from [Adafruit](https://www.adafruit.com)!
+ 
+MIT license, project and code by rdagger
+
+All text above, and the splash screen below must be included in any redistribution
+
+-----------------------
+If you are looking to make changes/additions, please use the GitHub Issues and Pull Request mechanisms.

BLE_Client_Server/Eagle/CP_Solenoid3.sch

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+from time import sleep
+from adafruit_ble.uart_client import UARTClient
+from adafruit_ble.scanner import Scanner
+from adafruit_bluefruit_connect.packet import Packet
+from adafruit_bluefruit_connect.button_packet import ButtonPacket
+from adafruit_bluefruit_connect.color_packet import ColorPacket
+from neopixel import NeoPixel
+from board import NEOPIXEL, SWITCH
+from adafruit_debouncer import Debouncer
+from digitalio import DigitalInOut, Direction, Pull
+import adafruit_fancyled.adafruit_fancyled as fancy
+
+pin = DigitalInOut(SWITCH)  # Set up built-in pushbutton switch
+pin.direction = Direction.INPUT
+pin.pull = Pull.UP
+switch = Debouncer(pin)
+
+pixels = NeoPixel(NEOPIXEL, 1)  # Set up built-in NeoPixel
+
+AQUA = 0x00FFFF    # (0, 255, 255)
+GREEN = 0x00FF00   # (0, 255, 0)
+ORANGE = 0xFF8000  # (255, 128, 0)
+RED = 0xFF0000     # (255, 0, 0)
+BLUE = 0x0000FF    # (0, 0, 255)
+
+gradients = {'Off': [(0.0, RED), (0.75, ORANGE)],
+             'On':  [(0.0, GREEN), (1.0, AQUA)]}
+palette = fancy.expand_gradient(gradients['Off'], 30)
+
+gamma_levels = (0.25, 0.3, 0.15)
+color_index = 1
+fade_direction = 1
+
+TARGET = 'a0:b4:c2:d0:e7:f2'  # CHANGE TO YOUR BLE ADDRESS
+
+button_packet = ButtonPacket("1", True)  # Transmits pressed button 1
+
+scanner = Scanner()  # BLE Scanner
+uart_client = UARTClient()  # BLE Client
+
+while True:
+    uart_addresses = []
+    pixels[0] = BLUE  # Blue LED indicates disconnected status
+    pixels.show()
+
+    # Keep trying to find target UART peripheral
+    while not uart_addresses:
+        uart_addresses = uart_client.scan(scanner)
+        for address in uart_addresses:
+            if TARGET in str(address):
+                uart_client.connect(address, 5)  # Connect to target
+
+    while uart_client.connected:  # Connected
+        switch.update()
+        if switch.fell:  # Check for button press
+            try:
+                uart_client.write(button_packet.to_bytes())  # Transmit press
+            except OSError:
+                pass
+        # Check for LED status receipt
+        if uart_client.in_waiting:
+            packet = Packet.from_stream(uart_client)
+            if isinstance(packet, ColorPacket):
+                if fancy.CRGB(*packet.color).pack() == GREEN:  # Color match
+                    # Green indicates on state
+                    palette = fancy.expand_gradient(gradients['On'], 30)
+                else:
+                    # Otherwise red indicates off
+                    palette = fancy.expand_gradient(gradients['Off'], 30)
+
+        # NeoPixel color fading routing
+        color = fancy.palette_lookup(palette, color_index / 29)
+        color = fancy.gamma_adjust(color, brightness=gamma_levels)
+        c = color.pack()
+        pixels[0] = c
+        pixels.show()
+        if color_index == 0 or color_index == 28:
+            fade_direction *= -1  # Change direction
+        color_index += fade_direction
+
+        sleep(0.02)