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‎PyPortal_MQTT_Control/code.py‎

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import board
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import displayio
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import busio
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from digitalio import DigitalInOut
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from analogio import AnalogIn
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import neopixel
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import adafruit_adt7410
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from adafruit_esp32spi import adafruit_esp32spi
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from adafruit_esp32spi import adafruit_esp32spi_wifimanager
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import adafruit_esp32spi.adafruit_esp32spi_socket as socket
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from adafruit_bitmap_font import bitmap_font
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from adafruit_display_text.label import Label
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from adafruit_button import Button
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import adafruit_touchscreen
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from adafruit_minimqtt import MQTT
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# ------------- WiFi ------------- #
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# Get wifi details and more from a secrets.py file
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try:
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from secrets import secrets
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except ImportError:
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print("WiFi secrets are kept in secrets.py, please add them there!")
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raise
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# If you are using a board with pre-defined ESP32 Pins:
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esp32_cs = DigitalInOut(board.ESP_CS)
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esp32_ready = DigitalInOut(board.ESP_BUSY)
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esp32_reset = DigitalInOut(board.ESP_RESET)
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spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
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esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)
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status_light = neopixel.NeoPixel(board.NEOPIXEL, 1, brightness=0.2)
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wifi = adafruit_esp32spi_wifimanager.ESPSPI_WiFiManager(esp, secrets, status_light)
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# ------- Sensor Setup ------- #
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# init. the temperature sensor
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i2c_bus = busio.I2C(board.SCL, board.SDA)
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adt = adafruit_adt7410.ADT7410(i2c_bus, address=0x48)
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adt.high_resolution = True
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temperature = "blaa"
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# init. the light sensor
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light_sensor = AnalogIn(board.LIGHT)
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# init. the motion sensor
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movement_sensor = DigitalInOut(board.D3)
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button1_state = 0
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button2_state = 0
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# ------------- Screen eliments ------------- #
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display = board.DISPLAY
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# Backlight function
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def set_backlight(val):
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"""Adjust the TFT backlight.
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:param val: The backlight brightness. Use a value between ``0`` and ``1``, where ``0`` is
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off, and ``1`` is 100% brightness.
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"""
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val = max(0, min(1.0, val))
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board.DISPLAY.auto_brightness = False
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board.DISPLAY.brightness = val
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# Touchscreen setup
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ts = adafruit_touchscreen.Touchscreen(board.TOUCH_XL, board.TOUCH_XR,
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board.TOUCH_YD, board.TOUCH_YU,
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calibration=((5200, 59000), (5800, 57000)),
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size=(320, 240))
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# ---------- Set the font and preload letters ----------
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# Be sure to put your font into a folder named "fonts".
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font = bitmap_font.load_font("/fonts/Helvetica-Bold-16.bdf")
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# This will preload the text images.
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font.load_glyphs(b'abcdefghjiklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890- ()')
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# ------------- User Inretface Eliments ------------- #
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# Make the display context
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splash = displayio.Group(max_size=200)
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board.DISPLAY.show(splash)
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# Make a background color fill
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color_bitmap = displayio.Bitmap(320, 240, 1)
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color_palette = displayio.Palette(1)
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color_palette[0] = 0x3D0068
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bg_sprite = displayio.TileGrid(color_bitmap, x=0, y=0,
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pixel_shader=color_palette)
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splash.append(bg_sprite)
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buttons = []
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# Default button styling:
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BUTTON_WIDTH = 100
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BUTTON_HEIGHT = 100
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BUTTON_MARGIN = 10
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# Button Objects
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button_1 = Button(x=BUTTON_MARGIN, y=BUTTON_MARGIN,
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width=BUTTON_WIDTH, height=BUTTON_HEIGHT,
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label="Button 1", label_font=font, style=Button.SHADOWROUNDRECT, label_color=0x505050,
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fill_color=0x9e9e9e, outline_color=0x464646)
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buttons.append(button_1)
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button_2 = Button(x=BUTTON_MARGIN, y=BUTTON_MARGIN*2+BUTTON_HEIGHT,
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width=BUTTON_WIDTH, height=BUTTON_HEIGHT,
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label="Button 2", label_font=font, style=Button.SHADOWROUNDRECT, label_color=0x505050,
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fill_color=0x9e9e9e, outline_color=0x464646)
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buttons.append(button_2)
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for b in buttons:
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splash.append(b.group)
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# Text Label Objects
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temperature_label = Label(font, text="temperature", color=0xE300D2, max_glyphs=40)
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temperature_label.x = 130
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temperature_label.y = 20
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splash.append(temperature_label)
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light_label = Label(font, text="lux", color=0xE300D2, max_glyphs=40)
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light_label.x = 130
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light_label.y = 40
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splash.append(light_label)
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motion_label = Label(font, text="motion", color=0xE300D2, max_glyphs=40)
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motion_label.x = 130
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motion_label.y = 60
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splash.append(motion_label)
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feed1_label = Label(font, text="MQTT feed1", color=0xE39300, max_glyphs=100)
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feed1_label.x = 130
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feed1_label.y = 130
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splash.append(feed1_label)
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feed2_label = Label(font, text="MQTT feed2", color=0x00DCE3, max_glyphs=100)
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feed2_label.x = 130
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feed2_label.y = 200
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splash.append(feed2_label)
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# ------------- MQTT Topic Setup ------------- #
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mqtt_topic = 'test/topic'
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mqtt_temperature = 'pyportal/temperature'
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mqtt_lux = 'pyportal/lux'
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mqtt_PIR = 'pyportal/pir'
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mqtt_button1 = 'pyportal/button1'
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mqtt_button2 = 'pyportal/button2'
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mqtt_feed1 = 'pyportal/feed1'
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mqtt_feed2 = 'pyportal/feed2'
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# ------------- MQTT Functions ------------- #
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# Define callback methods which are called when events occur
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# pylint: disable=unused-argument, redefined-outer-name
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def connect(client, userdata, flags, rc):
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# This function will be called when the client is connected
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# successfully to the broker.
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print('Connected to MQTT Broker!')
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print('Flags: {0}\n RC: {1}'.format(flags, rc))
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def disconnected(client, userdata, rc):
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# This method is called when the client is disconnected
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print('Disconnected from MQTT Broker!')
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def subscribe(client, userdata, topic, granted_qos):
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# This method is called when the client subscribes to a new feed.
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print('Subscribed to {0} with QOS level {1}'.format(topic, granted_qos))
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def publish(client, userdata, topic, pid):
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# This method is called when the client publishes data to a feed.
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print('Published to {0} with PID {1}'.format(topic, pid))
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def message(client, topic, message):
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"""Method callled when a client's subscribed feed has a new
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value.
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:param str topic: The topic of the feed with a new value.
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:param str message: The new value
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"""
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print('New message on topic {0}: {1}'.format(topic, message))
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if topic == "pyportal/feed1":
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feed1_label.text = 'Next Bus: {}'.format(message)
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if topic == "pyportal/feed2":
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feed2_label.text = 'Weather: \n {}'.format(message)
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if topic == "pyportal/button1":
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if message == "1":
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buttons[0].label="ON"
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buttons[0].selected = False
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print("Button 1 ON")
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else:
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buttons[0].label="OFF"
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buttons[0].selected = True
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print("Button 1 OFF")
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# ------------- Network Connection ------------- #
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# Connect to WiFi
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wifi.connect()
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# Set up a MiniMQTT Client
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client = MQTT(socket,
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broker = secrets['broker'],
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port = 1883,
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username = secrets['user'],
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password = secrets['pass'],
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network_manager = wifi)
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# Connect callback handlers to client
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client.on_connect = connect
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client.on_disconnect = disconnected
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client.on_subscribe = subscribe
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client.on_publish = publish
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client.on_message = message
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print('Attempting to connect to %s' % client.broker)
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client.connect()
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print('Subscribing to %s, %s, %s, and %s' % (mqtt_feed1, mqtt_feed2, mqtt_button1, mqtt_button2))
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client.subscribe(mqtt_feed1)
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client.subscribe(mqtt_feed2)
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client.subscribe(mqtt_button1)
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client.subscribe(mqtt_button2)
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# ------------- Code Loop ------------- #
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while True:
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# Poll the message queue
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client.loop()
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# Read sensor data and format
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light_value = lux = light_sensor.value
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light_label.text = 'Light Sensor: {}'.format(light_value)
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temperature = round(adt.temperature)
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temperature_label.text = 'Temp Sensor: {}'.format(temperature)
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movement_value = movement_sensor.value
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motion_label.text = 'PIR Sensor: {}'.format(movement_value)
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# Read display button press
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touch = ts.touch_point
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if touch:
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for i, b in enumerate(buttons):
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if b.contains(touch):
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print('Sending button%d pressed' % i)
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if i == 0:
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# Toggle switch button type
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if button1_state == 0:
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button1_state = 1
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b.label = "ON"
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b.selected = False
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print("Button 1 ON")
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else:
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button1_state = 0
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b.label = "OFF"
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b.selected = True
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print("Button 1 OFF")
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print('Sending button 1 state: ')
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client.publish(mqtt_button1, button1_state)
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# for debounce
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while ts.touch_point:
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print("Button 1 Pressed")
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if i == 1:
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# Momentary button type
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b.selected = True
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print('Sending button 2 state: ')
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client.publish(mqtt_button2, 1)
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# for debounce
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while ts.touch_point:
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print("Button 2 Pressed")
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print("Button 2 reliced")
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print('Sending button 2 state: ')
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client.publish(mqtt_button2, 0)
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b.selected = False
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# Publish sensor data to MQTT
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print('Sending light sensor value: %d' % light_value)
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client.publish(mqtt_lux, light_value)
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print('Sending temperature value: %d' % temperature)
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client.publish(mqtt_temperature, temperature)
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print('Sending motion sensor value: %d' % movement_value)
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client.publish(mqtt_PIR, '{}'.format(movement_value))

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