77 lines
2.2 KiB
Python
Executable file
77 lines
2.2 KiB
Python
Executable file
# SPDX-FileCopyrightText: 2021 Melissa LeBlanc-Williams for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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"""
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SHTC3 Temperature/Humidity Sensor Example for
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using CircuitPython with Home Assistant
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Author: Melissa LeBlanc-Williams for Adafruit Industries
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"""
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import time
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import ssl
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import json
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import alarm
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import board
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import socketpool
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import wifi
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import adafruit_minimqtt.adafruit_minimqtt as MQTT
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import adafruit_shtc3
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PUBLISH_DELAY = 60
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MQTT_TOPIC = "state/temp-sensor"
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USE_DEEP_SLEEP = True
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# Connect to the Sensor
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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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sht = adafruit_shtc3.SHTC3(i2c)
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# Add a secrets.py to your filesystem that has a dictionary called secrets with "ssid" and
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# "password" keys with your WiFi credentials. DO NOT share that file or commit it into Git or other
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# source control.
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# pylint: disable=no-name-in-module,wrong-import-order
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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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wifi.radio.connect(secrets["ssid"], secrets["password"])
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print("Connected to %s!" % secrets["ssid"])
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# Create a socket pool
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pool = socketpool.SocketPool(wifi.radio)
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# Set up a MiniMQTT Client
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mqtt_client = MQTT.MQTT(
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broker=secrets["mqtt_broker"],
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port=secrets["mqtt_port"],
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username=secrets["mqtt_username"],
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password=secrets["mqtt_password"],
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socket_pool=pool,
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ssl_context=ssl.create_default_context(),
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)
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print("Attempting to connect to %s" % mqtt_client.broker)
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mqtt_client.connect()
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while True:
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temperature, relative_humidity = sht.measurements
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output = {
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"temperature": temperature,
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"humidity": relative_humidity,
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}
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print("Publishing to %s" % MQTT_TOPIC)
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mqtt_client.publish(MQTT_TOPIC, json.dumps(output))
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if USE_DEEP_SLEEP:
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mqtt_client.disconnect()
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pause = alarm.time.TimeAlarm(monotonic_time=time.monotonic() + PUBLISH_DELAY)
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alarm.exit_and_deep_sleep_until_alarms(pause)
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else:
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last_update = time.monotonic()
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while time.monotonic() < last_update + PUBLISH_DELAY:
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mqtt_client.loop()
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