greenhouse: Initial commit
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Thomas Klaehn
commit
b2ad105079
10
greenhouse.service
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10
greenhouse.service
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[Unit]
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Description=Greenhouse service
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After=multi-user.target
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[Service]
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Type=idle
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ExecStart=/usr/bin/python3 -m greenhouse
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[Install]
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WantedBy=multi-user.target
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0
greenhouse/__init__.py
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0
greenhouse/__init__.py
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154
greenhouse/__main__.py
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greenhouse/__main__.py
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#!/usr/bin/env python3
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import datetime
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import logging
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import sys
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import threading
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import time
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import RPi.GPIO as gpio
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import paho.mqtt.client as mqtt
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import Adafruit_DHT
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SWITCH_ON_TEMP = 8.0
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SWITCH_OFF_TEMP = 10.0
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log_level = logging.INFO
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LOG_FILE = "/var/log/greenhouse.log"
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LOG_FORMAT = "%(asctime)s %(levelname)s %(message)s"
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#logging.basicConfig(format=LOG_FORMAT, level=log_level, filename=LOG_FILE)
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logging.basicConfig(format=LOG_FORMAT, level=log_level)
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log = logging.getLogger('greenhouse')
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class EnvData(object):
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def __init__(self):
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self.stamp = datetime.datetime.fromtimestamp(0)
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self.temperature = -273.15
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self.humidity = -1.0
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self.is_valid = False
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class EnvDataCollector(threading.Thread):
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def __init__(self, name, dht_pin, update_interval=10):
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super(EnvDataCollector, self).__init__()
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self.name = name
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self.sensor = 22
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self.dht_pin = dht_pin
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self.update_interval = update_interval
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self.run_condition = True
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self.data = EnvData()
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def run(self):
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next_update = datetime.datetime.now()
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while self.run_condition:
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now = datetime.datetime.now()
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if now >= next_update:
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humidity, temperature = Adafruit_DHT.read(self.sensor, self.dht_pin)
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if humidity is None or temperature is None:
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log.info("%s: No data read - setting re-read intterval to 1s.", self.name)
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next_update = now + datetime.timedelta(seconds=1)
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else:
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if humidity >= 0.0 and humidity <= 100.0 and temperature >= -273.15:
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self.data.temperature = temperature
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self.data.humidity = humidity
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self.data.stamp = now
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self.data.is_valid = True
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next_update = now + datetime.timedelta(seconds=self.update_interval)
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log.info("%s: Data read - setting re-read intterval to %ss.",
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self.name, self.update_interval)
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else:
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log.info("%s: Invalid data read - setting re-read intterval to 1s.",
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self.name)
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next_update = now + datetime.timedelta(seconds=1)
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time.sleep(1)
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def stop(self):
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self.run_condition = False
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self.join()
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class MqttHandler(object):
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def __init__(self, url, port, certificate):
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self.url = url
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self.port = port
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self.certificate = certificate
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self.client = mqtt.Client()
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self.client.tls_set(certificate)
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self.client.connect(url, port, 60)
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self.client.loop_start()
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def stop(self):
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self.client.loop_stop()
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self.client.disconnect()
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def transmit(self, topic, message):
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self.client.publish(topic, message, qos=2, retain=True)
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class Heat(object):
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def __init__(self, pin):
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self.pin = pin
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gpio.setwarnings(False)
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gpio.setmode(gpio.BCM)
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gpio.setup(pin, gpio.OUT)
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def on(self):
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gpio.output(self.pin, 0)
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def off(self):
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gpio.output(self.pin, 1)
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def main():
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old_green = EnvDataCollector("Greenhouse one", 17)
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old_heat = Heat(6)
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old_heat_state = "off"
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new_green = EnvDataCollector("Greenhouse two", 21)
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old_green.start()
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new_green.start()
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mqtt_handler = MqttHandler("mqtt.blackfinn.de", 8883, "/etc/ssl/certs/DST_Root_CA_X3.pem")
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try:
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next_update = datetime.datetime.now()
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while True:
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now = datetime.datetime.now()
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if now >= next_update:
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# 1) Check timestamp of last data collection. If data are older
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# than 5 minutes the sensor isn't working anymore.
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if old_green.data.is_valid and old_green.data.stamp + datetime.timedelta(minutes=5) >= now:
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msg = "{} {}".format(datetime.datetime.timestamp(old_green.data.stamp), old_green.data.temperature)
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mqtt_handler.transmit("outdoor/greenhouse/temperature", msg)
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log.info("%s: Temperature: %s", old_green.data.stamp.time(), old_green.data.temperature)
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msg = "{} {}".format(datetime.datetime.timestamp(old_green.data.stamp), old_green.data.humidity)
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mqtt_handler.transmit("outdoor/greenhouse/humidity", msg)
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log.info("%s: Humidity: %s", old_green.data.stamp.time(), old_green.data.humidity)
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if old_green.data.temperature < SWITCH_ON_TEMP and old_heat_state == "off":
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old_heat.on()
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old_heat_state = "on"
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msg = "{} {}".format(time.time(), old_heat_state)
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mqtt_handler.transmit("outdoor/greenhouse/heat", msg)
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log.info("%s: Heat: switch %s", time.time(), old_heat_state)
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elif old_green.data.temperature > SWITCH_OFF_TEMP and old_heat_state == "on":
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old_heat.off()
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old_heat_state = "off"
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msg = "{} {}".format(time.time(), old_heat_state)
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mqtt_handler.transmit("outdoor/greenhouse/heat", msg)
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log.info("%s: Heat: switch %s", time.time(), old_heat_state)
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next_update = now + datetime.timedelta(minutes=15)
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else:
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msg = "{} Error! Last valid DHT sensor data is from {}.".format(time.time(), old_green.data.stamp)
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mqtt_handler.transmit("outdoor/greenhouse/status", msg)
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log.error("%s: Error! Last valid DHT sensor data is from %s", time.time(), old_green.data.stamp)
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next_update = now + datetime.timedelta(seconds=5)
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time.sleep(1)
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except KeyboardInterrupt:
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log.info("Shutting down...")
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old_green.stop()
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new_green.stop()
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mqtt_handler.stop()
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log.info("Exiting...")
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if __name__ == "__main__":
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sys.exit(main())
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28
setup.py
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28
setup.py
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@ -0,0 +1,28 @@
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#!/usr/bin/python3
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'''
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@author: Thomas Klaehn <tkl@blackfinn.de>
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'''
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from distutils.core import setup
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import os
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import shutil
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import stat
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import sys
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NAME = 'greenhouse'
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VERSION = '1.0.0'
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AUTHOR = 'Thomas Klaehn'
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EMAIL = 'tkl@blackfinn.de'
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SYSTEMD_SCRIPTS = ['greenhouse.service']
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PACKAGES = ['greenhouse']
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PACKAGE_DIRS = {'greenhouse':'greenhouse'}
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SYSTEMD_PATH = '/lib/systemd/system/'
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if sys.argv[1] == 'install':
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for script in SYSTEMD_SCRIPTS:
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shutil.copyfile(script, os.path.join(SYSTEMD_PATH, script))
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os.chmod(os.path.join(SYSTEMD_PATH, script), stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IROTH)
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setup(name=NAME, version=VERSION, author=AUTHOR, author_email=EMAIL, package_dir=PACKAGE_DIRS, packages=PACKAGES)
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elif sys.argv[1] == 'sdist':
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setup(name=NAME, version=VERSION, author=AUTHOR, author_email=EMAIL, package_dir=PACKAGE_DIRS, packages=PACKAGES,
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scripts=SYSTEMD_SCRIPTS)
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