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garden_pi.py
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garden_pi.py
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#!/usr/bin/env python
# Pretty simple right now, just enough to water on a schedule and log the data
from common.zone import Zone
from common.cpu_temp import CpuTemp
from common.temp_sensor import TempSensor
from common.utils import run_as_thread
from common.utils import format_float
import common.csv_logger as cvs_logger
import ConfigParser
from apscheduler.schedulers.background import BackgroundScheduler
import sys
import signal
import time
import logging
from threading import Thread
# Config file
config_file = './garden_pi.cfg'
conf_parser = ConfigParser.ConfigParser()
conf_parser.read(config_file)
DEBUG = conf_parser.getboolean('main', 'debug')
# General sensors
ambient_temp_sensor_id = conf_parser.get('main', 'ambient_temp_sensor')
ambient_temp_sensor = TempSensor(ambient_temp_sensor_id)
ambient_light_sensor = None # TODO: We have no ambient light sensor until the tsl2561 sensor is working. For now, output a space.
c_temp = CpuTemp()
temp_scale = conf_parser.get('main', 'temp_scale')
if temp_scale.lower() not in ['f', 'fahrenheit', 'c', 'celsius']:
raise ValueError("temp_scale value must be one of 'f', 'fahrenheit', 'c' or 'celsius' (case insensitive)")
# Log file
logging.basicConfig()
log_file = conf_parser.get('main', 'logfile')
garden_pi_logger = cvs_logger.CvsLogger('./data/garden_pi.csv')
logger_ID = 'Gargen Pi Logger'
csv_logger = logging.getLogger(logger_ID)
# Initialize zones
zone_names = ['zone_1', 'zone_2', 'zone_3', 'zone_4']
garden_pi_zones = {}
for zone_name in zone_names:
alias = conf_parser.get(zone_name, 'alias')
moisture_sensor_pin = conf_parser.getint(zone_name, 'moisture_sensor_pin')
mcp_relay_pin = conf_parser.getint(zone_name, 'relay_gpio')
moisture_water_threshold = conf_parser.getint(zone_name, 'moisture_water_threshold')
watering_duration = conf_parser.getint(zone_name, 'watering_duration')
temp_sensor_id = conf_parser.get(zone_name, 'temp_sensor_id')
min_seconds_between_waterings = conf_parser.getint(zone_name, 'min_seconds_between_waterings')
garden_pi_zones[zone_name] = Zone(name=zone_name,
alias=alias,
moisture_sensor_pin=moisture_sensor_pin,
mcp_pin=mcp_relay_pin,
moisture_water_threshold=moisture_water_threshold,
watering_duration=watering_duration,
min_seconds_between_waterings=min_seconds_between_waterings,
temp_sensor_id=temp_sensor_id,
temp_scale=temp_scale)
class MeasurementData(object):
def __init__(self):
self._measurements = {'zone_1_moisture': None,
'zone_1_temp': None,
'zone_2_moisture': None,
'zone_2_temp': None,
'zone_3_moisture': None,
'zone_3_temp': None,
'zone_4_moisture': None,
'zone_4_temp': None,
'ambient_light': None,
'ambient_temp': None,
'cpu_temp': None}
def __getitem__(self, item):
return self._measurements[item]
def __setitem__(self, key, value):
self._measurements[key] = value
def reset(self):
for key in self._measurements.keys():
self._measurements[key] = None
@property
def done(self):
if None in self._measurements.viewvalues():
return False
@run_as_thread
def get_zone_measurement(self, zone_name, measurement_type):
assert zone_name in zone_names
if measurement_type == 'moisture':
self._measurements[zone_name + '_moisture'] = garden_pi_zones[zone_name].moisture
elif measurement_type == 'temp':
self._measurements[zone_name + '_temp'] = garden_pi_zones[zone_name].temp
else:
raise ValueError('measurement type %s unsupported' % measurement_type)
@run_as_thread
def get_ambient_light(self):
#self._measurements['ambient_light'] = ambient_light_sensor.rc_count()
self._measurements['ambient_light'] = 0 # TODO: We have no ambient light sensor until the tsl2561 sensor is working. For now, output a 0.
@run_as_thread
def get_ambient_temp(self):
global temp_scale
if temp_scale.lower() in ['f', 'fahrenheit']:
self._measurements['ambient_temp'] = ambient_temp_sensor.temp_f
elif temp_scale.lower() in ['c', 'celsius']:
self._measurements['ambient_temp'] = ambient_temp_sensor.temp_c
@run_as_thread
def get_cpu_temp(self):
global temp_scale
if temp_scale.lower() in ['f', 'fahrenheit']:
self._measurements['cpu_temp'] = c_temp.cpu_temp_f
elif temp_scale.lower() in ['c', 'celsius']:
self._measurements['cpu_temp'] = c_temp.cpu_temp_c
def log_measurements(measurement_d):
assert isinstance(measurement_data, MeasurementData)
measurement_d.reset()
my_threads = []
my_threads.append(measurement_d.get_ambient_light())
my_threads.append(measurement_d.get_ambient_temp())
my_threads.append(measurement_d.get_cpu_temp())
my_threads.append(measurement_d.get_zone_measurement('zone_1', 'moisture'))
my_threads.append(measurement_d.get_zone_measurement('zone_1', 'temp'))
my_threads.append(measurement_d.get_zone_measurement('zone_2', 'moisture'))
my_threads.append(measurement_d.get_zone_measurement('zone_2', 'temp'))
my_threads.append(measurement_d.get_zone_measurement('zone_3', 'moisture'))
my_threads.append(measurement_d.get_zone_measurement('zone_3', 'temp'))
my_threads.append(measurement_d.get_zone_measurement('zone_4', 'moisture'))
my_threads.append(measurement_d.get_zone_measurement('zone_4', 'temp'))
while True in map(Thread.is_alive, my_threads):
time.sleep(.1)
garden_pi_logger.log_csv(zone_1_moisture=measurement_d['zone_1_moisture'],
zone_1_temp=measurement_d['zone_1_temp'],
zone_2_moisture=measurement_d['zone_2_moisture'],
zone_2_temp=measurement_d['zone_2_temp'],
zone_3_moisture=measurement_d['zone_3_moisture'],
zone_3_temp=measurement_d['zone_3_temp'],
zone_4_moisture=measurement_d['zone_4_moisture'],
zone_4_temp=measurement_d['zone_4_temp'],
ambient_light=measurement_d['ambient_light'],
ambient_temp=measurement_d['ambient_temp'],
cpu_temp=measurement_d['cpu_temp'])
def water_zone(zone_name, force_water=False):
"""
Trigger watering of a zone by moisture sensor
:param zone_name: The name of the zone as used in the zone section header in the config file (i.e. 'zone_1', 'zone_4')
:type zone_name: str
"""
water = False
msg = ' '
# print('%s: Seconds_before_ok_to_water: %s' % (zone_name, garden_pi_zones[zone_name].seconds_before_ok_to_water))
# print('%s: Moisture: %s' % (zone_name, garden_pi_zones[zone_name].moisture))
# print('%s: Moisture threshold: %s' % (zone_name, garden_pi_zones[zone_name].moisture_water_threshold))
if (garden_pi_zones[zone_name].seconds_before_ok_to_water == 0) and (garden_pi_zones[zone_name].moisture < garden_pi_zones[zone_name].moisture_water_threshold):
# print("In 1")
water = True
msg = 'MOISTURE SENSOR'
if force_water is True:
# print("In 2")
water = True
msg = 'IMMEDIATE'
#print("%s: Water: %s" % (zone_name, water))
if water is True:
# print("In 3")
s = time.time()
garden_pi_logger.log_csv(messg='START WATERING (%s): %s' % (msg, zone_name.upper()))
garden_pi_zones[zone_name].water()
f = time.time()
garden_pi_logger.log_csv(messg='END WATERING (%s): %s. Elapsed Time: %ss' % (msg, zone_name.upper(), format_float(f-s)))
def cleanup(force_exit=False):
scheduler.shutdown(wait=False)
garden_pi_logger.log_csv(messg="SHUTTING DOWN")
if force_exit is True:
sys.exit(0)
def signal_handler(signal, frame):
"""
Handle Ctrl-C
:param signal:
:param frame:
:return:
"""
print '\nCtrl-C detected, cleaning up...'
cleanup(force_exit=True)
print('Starting Garden Pi')
signal.signal(signal.SIGINT, signal_handler)
scheduler = BackgroundScheduler()
measurement_data = MeasurementData()
#scheduler.add_job(log_measurements, args=[measurement_data], trigger='cron', minute='*/5', name='Data Logger', id='data_logger', max_instances=1, misfire_grace_time=20)
scheduler.add_job(log_measurements, args=[measurement_data], trigger='cron', minute='*', name='Data Logger', id='data_logger', max_instances=1, misfire_grace_time=20)
for zone_name in garden_pi_zones.keys():
#scheduler.add_job(water_zone, trigger='cron', hour='7,18', minute=15, args=[zone_name], name=zone_name, max_instances=1, misfire_grace_time=20)
scheduler.add_job(water_zone, trigger='cron', minute="*", kwargs={'zone_name': zone_name, 'force_water': False}, name=zone_name, max_instances=1, misfire_grace_time=20)
scheduler.start()
for job in scheduler.get_jobs():
print("Job: %s, Func: %s, Next run time: %s" % (job.name, job.func_ref, job.next_run_time))
sys.stdout.flush()
while True:
time.sleep(1)
cleanup()