68 lines
1.8 KiB
Python
Executable file
68 lines
1.8 KiB
Python
Executable file
# SPDX-FileCopyrightText: 2021 Melissa LeBlanc-Williams for Adafruit Industries
|
|
#
|
|
# SPDX-License-Identifier: MIT
|
|
|
|
"""
|
|
SHTC3 Temperature/Humidity Sensor Example for
|
|
using CircuitPython with Home Assistant
|
|
Author: Melissa LeBlanc-Williams for Adafruit Industries
|
|
"""
|
|
|
|
import os
|
|
import time
|
|
import ssl
|
|
import json
|
|
import alarm
|
|
import board
|
|
import socketpool
|
|
import wifi
|
|
import adafruit_minimqtt.adafruit_minimqtt as MQTT
|
|
import adafruit_shtc3
|
|
|
|
PUBLISH_DELAY = 60
|
|
MQTT_TOPIC = "state/temp-sensor"
|
|
USE_DEEP_SLEEP = True
|
|
|
|
# Connect to the Sensor
|
|
i2c = board.I2C() # uses board.SCL and board.SDA
|
|
# i2c = board.STEMMA_I2C() # For using the built-in STEMMA QT connector on a microcontroller
|
|
sht = adafruit_shtc3.SHTC3(i2c)
|
|
|
|
wifi.radio.connect(os.getenv("CIRCUITPY_WIFI_SSID"), os.getenv("CIRCUITPY_WIFI_PASSWORD"))
|
|
print("Connected to %s!" % os.getenv("CIRCUITPY_WIFI_SSID"))
|
|
|
|
# Create a socket pool
|
|
pool = socketpool.SocketPool(wifi.radio)
|
|
|
|
# Set up a MiniMQTT Client
|
|
mqtt_client = MQTT.MQTT(
|
|
broker=os.getenv("MQTT_BROKER"),
|
|
port=os.getenv("MQTT_PORT"),
|
|
username=os.getenv("MQTT_USERNAME"),
|
|
password=os.getenv("MQTT_PASSWORD"),
|
|
socket_pool=pool,
|
|
ssl_context=ssl.create_default_context(),
|
|
)
|
|
|
|
print("Attempting to connect to %s" % mqtt_client.broker)
|
|
mqtt_client.connect()
|
|
|
|
while True:
|
|
temperature, relative_humidity = sht.measurements
|
|
|
|
output = {
|
|
"temperature": temperature,
|
|
"humidity": relative_humidity,
|
|
}
|
|
|
|
print("Publishing to %s" % MQTT_TOPIC)
|
|
mqtt_client.publish(MQTT_TOPIC, json.dumps(output))
|
|
|
|
if USE_DEEP_SLEEP:
|
|
mqtt_client.disconnect()
|
|
pause = alarm.time.TimeAlarm(monotonic_time=time.monotonic() + PUBLISH_DELAY)
|
|
alarm.exit_and_deep_sleep_until_alarms(pause)
|
|
else:
|
|
last_update = time.monotonic()
|
|
while time.monotonic() < last_update + PUBLISH_DELAY:
|
|
mqtt_client.loop()
|