118 lines
3.6 KiB
Python
118 lines
3.6 KiB
Python
# SPDX-FileCopyrightText: 2021 Eva Herrada for Adafruit Industries
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# SPDX-License-Identifier: MIT
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import time
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import board
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from digitalio import DigitalInOut
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import adafruit_connection_manager
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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 neopixel
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import adafruit_minimqtt.adafruit_minimqtt as MQTT
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from adafruit_io.adafruit_io import IO_MQTT
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from adafruit_seesaw.seesaw import Seesaw
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import busio
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# Used to make sure that the Adafruit IO Trigger is only run once when the moisture value is below
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# the desired threshold, set in MIN
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LOW = False
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# The minimum moisture value. If the value is below this number, it will activate the Adafruit IO
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# trigger. This number should match the number you set in your Adafruit IO trigger. Feel free
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# to mess around and try out different moisture values as how wet this actually is can vary a lot
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# depending on where the sensor is and the soil in the pot.
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MIN = 500
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# Set up moisture sensor with seesaw
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i2c = board.I2C() # uses board.SCL and board.SDA
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# i2c = board.STEMMA_I2C() # For using the built-in STEMMA QT connector on a microcontroller
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seesaw = Seesaw(i2c, addr=0x36)
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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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# Set up WiFi
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esp32_cs = DigitalInOut(board.D13)
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esp32_ready = DigitalInOut(board.D11)
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esp32_reset = DigitalInOut(board.D12)
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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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# Define callback functions which will be called when certain events happen.
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# pylint: disable=unused-argument
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def connected(client):
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# This method is called when the client connects to Adafruit IO
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client.subscribe("plant")
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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 message(client, feed_id, payload):
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# This method is called when a feed receives a new message
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print("Feed {0} received new value: {1}".format(feed_id, payload))
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# Connect to WiFi
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print("Connecting to WiFi...")
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wifi.connect()
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print("Connected!")
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pool = adafruit_connection_manager.get_radio_socketpool(esp)
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ssl_context = adafruit_connection_manager.get_radio_ssl_context(esp)
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# Initialize a new MQTT Client object
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mqtt_client = MQTT.MQTT(
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broker="io.adafruit.com",
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username=secrets["aio_username"],
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password=secrets["aio_key"],
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socket_pool=pool,
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ssl_context=ssl_context,
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)
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# Initialize an Adafruit IO MQTT Client
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io = IO_MQTT(mqtt_client)
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# Connect the callback methods defined above to Adafruit IO
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io.on_connect = connected
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io.on_subscribe = subscribe
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io.on_message = message
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# Connect to Adafruit IO
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print("Connecting to Adafruit IO...")
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io.connect()
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plant_feed = "plant"
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START = 0
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while True:
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# read moisture level through capacitive touch pad
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touch = seesaw.moisture_read()
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# read temperature from the temperature sensor
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temp = seesaw.get_temp()
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if touch < MIN:
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if not LOW:
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io.publish(plant_feed, touch)
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print("published")
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LOW = True
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elif touch >= MIN and time.time() - START > 10:
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io.publish(plant_feed, touch)
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print("published to Adafruit IO")
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START = time.time()
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LOW = False
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print("temp: " + str(temp) + " moisture: " + str(touch))
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time.sleep(1)
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