Merge pull request #1253 from brentru/add-iot-basics-schedule-trigger

Add IO Basics Scheduled Trigger Guide Code

Author: brentru

Adafruit_IO_Schedule_Trigger/code.py

@@ -0,0 +1,145 @@
+import time
+import board
+import busio
+from digitalio import DigitalInOut
+from adafruit_esp32spi import adafruit_esp32spi
+from adafruit_esp32spi import adafruit_esp32spi_wifimanager
+import adafruit_esp32spi.adafruit_esp32spi_socket as socket
+import neopixel
+import adafruit_minimqtt.adafruit_minimqtt as MQTT
+from adafruit_io.adafruit_io import IO_MQTT
+
+### WiFi ###
+
+# Get wifi details and more from a secrets.py file
+try:
+    from secrets import secrets
+except ImportError:
+    print("WiFi secrets are kept in secrets.py, please add them there!")
+    raise
+
+# If you are using a board with pre-defined ESP32 Pins:
+esp32_cs = DigitalInOut(board.ESP_CS)
+esp32_ready = DigitalInOut(board.ESP_BUSY)
+esp32_reset = DigitalInOut(board.ESP_RESET)
+
+# If you have an externally connected ESP32:
+# esp32_cs = DigitalInOut(board.D9)
+# esp32_ready = DigitalInOut(board.D10)
+# esp32_reset = DigitalInOut(board.D5)
+
+spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
+esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)
+"""Use below for Most Boards"""
+status_light = neopixel.NeoPixel(
+    board.NEOPIXEL, 1, brightness=0.2
+)  # Uncomment for Most Boards
+"""Uncomment below for ItsyBitsy M4"""
+# status_light = dotstar.DotStar(board.APA102_SCK, board.APA102_MOSI, 1, brightness=0.2)
+# Uncomment below for an externally defined RGB LED
+# import adafruit_rgbled
+# from adafruit_esp32spi import PWMOut
+# RED_LED = PWMOut.PWMOut(esp, 26)
+# GREEN_LED = PWMOut.PWMOut(esp, 27)
+# BLUE_LED = PWMOut.PWMOut(esp, 25)
+# status_light = adafruit_rgbled.RGBLED(RED_LED, BLUE_LED, GREEN_LED)
+wifi = adafruit_esp32spi_wifimanager.ESPSPI_WiFiManager(esp, secrets, status_light)
+
+# Set up a pin for controlling the relay
+power_pin = DigitalInOut(board.D3)
+power_pin.switch_to_output()
+
+# Define callback functions which will be called when certain events happen.
+# pylint: disable=unused-argument
+def connected(client):
+    # Connected function will be called when the client is connected to Adafruit IO.
+    # This is a good place to subscribe to feed changes.  The client parameter
+    # passed to this function is the Adafruit IO MQTT client so you can make
+    # calls against it easily.
+    print("Connected to Adafruit IO!")
+
+
+def subscribe(client, userdata, topic, granted_qos):
+    # This method is called when the client subscribes to a new feed.
+    print("Listening for changes on relay feed...")
+
+
+def unsubscribe(client, userdata, topic, pid):
+    # This method is called when the client unsubscribes from a feed.
+    print("Unsubscribed from {0} with PID {1}".format(topic, pid))
+
+
+# pylint: disable=unused-argument
+def disconnected(client):
+    # Disconnected function will be called when the client disconnects.
+    print("Disconnected from Adafruit IO!")
+
+
+# pylint: disable=unused-argument
+def on_message(client, feed_id, payload):
+    # Message function will be called when a subscribed feed has a new value.
+    # The feed_id parameter identifies the feed, and the payload parameter has
+    # the new value.
+    print("Feed {0} received new value: {1}".format(feed_id, payload))
+
+
+def on_relay_msg(client, topic, message):
+    # Method called whenever user/feeds/relay has a new value
+    if message == "morning":
+        print("Morning - turning outlet ON")
+        power_pin.value = True
+    elif message == "night":
+        print("Night - turning outlet OFF")
+        power_pin.value = False
+    else:
+        print("Unexpected value received on relay feed.")
+
+
+# Connect to WiFi
+print("Connecting to WiFi...")
+wifi.connect()
+print("Connected!")
+
+# Initialize MQTT interface with the esp interface
+MQTT.set_socket(socket, esp)
+
+# Initialize a new MQTT Client object
+mqtt_client = MQTT.MQTT(
+    broker="io.adafruit.com",
+    username=secrets["aio_username"],
+    password=secrets["aio_key"],
+)
+
+# Initialize an Adafruit IO MQTT Client
+io = IO_MQTT(mqtt_client)
+
+# Connect the callback methods defined above to Adafruit IO
+io.on_connect = connected
+io.on_disconnect = disconnected
+io.on_subscribe = subscribe
+io.on_unsubscribe = unsubscribe
+io.on_message = on_message
+
+# Connect to Adafruit IO
+print("Connecting to Adafruit IO...")
+io.connect()
+
+# Set up a message handler for the relay feed
+io.add_feed_callback("relay", on_relay_msg)
+
+# Subscribe to all messages on the relay feed
+io.subscribe("relay")
+
+# Get the most recent value on the relay feed
+io.get("relay")
+
+# Start a blocking loop to check for new messages
+while True:
+    try:
+        io.loop()
+    except (ValueError, RuntimeError) as e:
+        print("Failed to get data, retrying\n", e)
+        wifi.reset()
+        io.reconnect()
+        continue
+    time.sleep(0.5)