dht11.service

[Unit]
Description=Home assistant service for Temperature/Humidity

[Service]
ExecStart=/usr/bin/python3 /opt/remotehomeassistant_dht11.py
WorkingDirectory=/opt/
StandardOutput=inherit
StandardError=inherit
Restart=always
User=pi

[Install]
WantedBy=multi-user.target

remotehomeassistant_dht11.py

#!/usr/bin/env python3

import time
import Adafruit_DHT
import requests
 
# Initial the dht device, with data pin connected to:
gpio = 14
url = 'https://homeassistanturl:8123'
name = 'raspberry'
key = 'Bearer ........................'
refreshrate = 30
force_count = 60

count = 0
old_humidity = 0
old_temperature = 0

sensor=Adafruit_DHT.DHT11

while True:
    try:
        humidity, temperature_c = Adafruit_DHT.read_retry(sensor, gpio)
        if old_temperature != temperature_c or count == 0:
            requests.post('{}/api/states/sensor.{}_temperature'.format(url, name),
                headers={'Authorization': key},
                json={"state": temperature_c,
                      "attributes": {
                          "unit_of_measurement": "°C",
                          "device_class": "temperature",
                      }
                }
            )
            old_temperature = temperature_c
            print('sent new temp data')
        if old_humidity != humidity or count == 0:
            requests.post('{}/api/states/sensor.{}_humidity'.format(url, name),
                headers={'Authorization': key},
                json={"state": humidity,
                      "attributes": {
                          "unit_of_measurement": "%",
                          "device_class": "humidity",
                      }
                }
            )
            old_humidity = humidity
            print('sent new humidity data')
    
        if count == 0:
            count = force_count
        count -= 1
        print("Temp: {:.1f} C    Humidity: {}% ".format(temperature_c, humidity))
 
    except Exception as error:
        print(error.args[0])

    time.sleep(refreshrate)