94 lines
2.8 KiB
Python
94 lines
2.8 KiB
Python
#!/usr/bin/python3
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# -*- coding: utf-8 -*-
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import requests
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import json
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import time
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import Adafruit_DHT
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config = json.load(open("/etc/dht22_sensing.json"))
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class Filter:
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def __init__(self, filter_length, max_mean_deviation):
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self._length = filter_length
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self.values = []
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self.max_mean_deviation = max_mean_deviation
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def mean(self):
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return sum(self.values) / len(self.values)
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def is_valid_value(self, val):
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if len(self.values) == 0:
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return True
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else:
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return abs(val - self.mean()) < self.max_mean_deviation
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def add_if_valid(self, val):
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if val is None:
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return False
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if self.is_valid_value(val):
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self.values.append(val)
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if len(self.values) > self._length:
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self.values.pop(0)
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return True
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else:
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return False
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def send_to_home_assistant(temperature, humidity):
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# print(f"Sending temperature {temperature}, humidity {humidity}")
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headers = {
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'x-ha-access': config['token'],
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'Authorization': "Bearer {}".format(config['token'])
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}
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temperature_url = "{}/api/states/sensor.{}".format(
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config['ha_url'], config['ha_temp_sensor_name'])
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temperatur_data = {
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"state": "{:.1f}".format(temperature),
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"attributes": {
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"device_class": "temperature",
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"friendly_name": config['ha_temp_friendly_name'],
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"unit_of_measurement": "°C"
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}
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}
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requests.post(temperature_url, json=temperatur_data, headers=headers)
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humidity_url = "{}/api/states/sensor.{}".format(
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config['ha_url'], config['ha_humidity_sensor_name'])
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humidity_data = {
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"state": "{:.1f}".format(humidity),
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"attributes": {
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"device_class": "humidity",
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"friendly_name": config['ha_humidity_friendly_name'],
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"unit_of_measurement": "%"
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}
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}
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requests.post(humidity_url, json=humidity_data, headers=headers)
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if __name__ == "__main__":
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temp_filter = Filter(4, 10)
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humidity_filter = Filter(4, 10)
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while True:
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sensor = Adafruit_DHT.DHT22
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humidity, temperature = Adafruit_DHT.read_retry(
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sensor, config['dht_pin'])
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temp_valid = temp_filter.add_if_valid(temperature)
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humidity_valid = humidity_filter.add_if_valid(humidity)
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if not (temp_valid and humidity_valid):
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print(
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f"Discarding value {temperature}C / {humidity}%, because to far from means {temp_filter.mean()}C, {humidity_filter.mean()}%")
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else:
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try:
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send_to_home_assistant(temperature, humidity)
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except Exception as e:
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print("Failed sending to home assistant")
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print(e)
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time.sleep(float(config['polling_sleep_time_seconds']))
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