def do_update():
# in case of error, retry after brief pause
for retry in (3, 1):
try:
timestamp = time.time()
ambient = temp_sensor.TempSensor("28-0000052f7386")
freezer = temp_sensor.TempSensor("28-0000055fc26e")
fridge = temp_sensor.TempSensor("28-0000052f91b1")
ambient_temp = ambient.get_temperature()
freezer_temp = freezer.get_temperature()
fridge_temp = fridge.get_temperature()
rrdtool.update(
"/var/1w_files/templog.rrd", "%d:%s:%s:%s" %
(timestamp, ambient_temp, freezer_temp, fridge_temp))
except:
logging.exception("retry in %is because of: ", retry)
#time.sleep(retry * 1000)
time.sleep(100)
# control section
gpio = gpio_sensor.Gpio("gpio27")
# if fridge > 4.4C turn off light
if fridge_temp > 4.4:
gpio.put_value("0")
else:
# otherwise fridge is < 4.4 C
if freezer_temp > -15:
# if freezer > -15C turn on light (warm fridge to start cooling)
gpio.put_value("1")
else:
if freezer_temp < -20:
# if freezer < -20C turn off light (want to drift down to -24 or so)
gpio.put_value("0")
# return
return
def produceData():
global current
global client
global light
# email configuration
sender_email = "Your Fridge <*****@*****.**>"
receiver_email = "*****@*****.**"
# threshold temp in C
EMAIL_FRIDGE_THRESH = 7
EMAIL_FREEZER_THRESH = -10
# time in seconds that threshold must be exceeded
EMAIL_THRESHOLD_TIME = 1200
# min alert email interval in seconds
EMAIL_ALERT_INTERVAL = 86400
# informative message template
text = """\
From: {}
To: {}
Subject: HIGH TEMPERATURE ALERT
Hi,
On {}, the fridge was {} deg C and the freezer was {} deg C.
Click http://10.0.0.8:8080/view?scale=day for more information.
"""
"""
thread to aquire samples continuously
"""
#file = open("/var/1w_files/log.csv", "a")
# bootstrap timers (take/send readings immediately on start)
timestamp = time.time() - 5
cayenne_timestamp = time.time() - 280
# create sensor/control objects, GPIO and 1wire
light = gpio_sensor.Gpio("gpio27")
switch = gpio_sensor.Gpio("gpio22")
ambient = temp_sensor.TempSensor("28-0000052f7386")
freezer = temp_sensor.TempSensor("28-0000055fc26e")
fridge = temp_sensor.TempSensor("28-0000052f91b1")
# timers for alarm threshold & alert rate limiting
threshold_timestamp = time.time()
last_alert_timestamp = 0 # send alert immediately after threshold time
while(True):
if (time.time()-timestamp) > 5.0 :
timestamp = time.time()
# grab temperature data. skip sensor in case of error
try:
ambient_temp = ambient.get_temperature()
except Exception:
pass
try:
freezer_temp = freezer.get_temperature()
except Exception:
pass
try:
# fridge thermometer has offset
#fridge_temp = fridge.get_temperature() - 3.333
# fridge temp offset dhanged 12/25/2019
fridge_temp = fridge.get_temperature() + 2.000
except Exception:
pass
light_state = light.get_value()
switch_state = switch.get_value()
# light control logic
FDefrost = freezer_temp >= -6.0 # defrost mode in freezer
FHigh = (freezer_temp < -6.0) & (freezer_temp > -15.0) # "high"
FLow = freezer_temp <= -15.0 # freezer temp is "low"
RHigh = fridge_temp > 8.0 # fridge temp is "high"
RBand = (fridge_temp <= 8.0) & (fridge_temp >= 1.5) # "band"
RLow = fridge_temp < 1.5 # fridge temp is "low"
Door = switch_state == 1
control = (FHigh & RBand) | RLow | Door
light_state = to_int(control)
light.put_value(light_state)
current = {
"time": timestamp,
"ambient": ambient_temp,
"freezer": freezer_temp,
"fridge": fridge_temp,
"light": light_state,
"switch": switch_state,
}
print("Producer: "),
print(current)
#update rrdtool database. rrdtool is used for webpage graphics
rrdtool.update("/var/1w_files/templog.rrd", \
"%d:%s:%s:%s:%s:%s" % (timestamp, \
ambient_temp, \
freezer_temp, \
fridge_temp, \
light_state, \
switch_state))
# update element in queue for socketserver
try:
q.get(False) # empty the old queue element
except Exception:
pass # queue was empty already
q.put(current, False) # insert new element
# log all data to file
#foo = ("%d,%s,%s,%s,%s\n") % ( current["time"], current["freezer"], current["fridge"], current["ambient"], current["light"] )
#file.write(foo)
#file.flush()
# update cayenne about every 5 minutes
if ((time.time() - cayenne_timestamp) > 300):
print("Publish to cayenne")
cayenne_timestamp = time.time()
client.celsiusWrite(1, ambient_temp)
client.celsiusWrite(2, freezer_temp)
client.celsiusWrite(3, fridge_temp)
client.virtualWrite(4, light_state, dataType="digital_actuator", dataUnit="d")
client.loop()
# check for alarm condition and possibly send email
if ( (freezer_temp < EMAIL_FREEZER_THRESH) and (fridge_temp < EMAIL_FRIDGE_THRESH) ):
# everything normal, reset threshold exceeded time to current time
threshold_timestamp = time.time()
else:
# we have a problem, maybe send email
if (( (time.time() - threshold_timestamp) > EMAIL_THRESHOLD_TIME) and (( time.time() - last_alert_timestamp) > EMAIL_ALERT_INTERVAL) ):
# send email, threshold exceeded and alert interval exceeded
print("Send alert email now!");
proc = Popen(['/usr/sbin/sendmail','-t','-oi'], stdin=PIPE)
print(text.format(sender_email,receiver_email,time.strftime("%c"),fridge_temp,(fridge_temp*C_TO_F+32),freezer_temp,(freezer_temp*C_TO_F+32)).encode('utf8'))
proc.communicate(text.format(sender_email,receiver_email,time.strftime("%c"),fridge_temp,freezer_temp).encode('utf8'))
proc.wait()
# we sent an alert, so reset rate-limiting timer
last_alert_timestamp = time.time()
# end of while(True)
else:
# check for cayenne publish or commands
client.loop()
time.sleep(0.1)
#!/usr/bin/python
# this code runs every minute to collect stats and control the light buld
import logging
import logging.handlers
#import rrdtool
import temp_sensor
import gpio_sensor
import time
import sys
light = gpio_sensor.Gpio("gpio27")
switch = gpio_sensor.Gpio("gpio22")
def do_update():
# grab temperature data. in case of error, retry after brief pause
# for retry in (5, 1):
# try:
# timestamp = time.time()
# ambient = temp_sensor.TempSensor("28-0000052f7386")
# freezer = temp_sensor.TempSensor("28-0000055fc26e")
# fridge = temp_sensor.TempSensor("28-0000052f91b1")
# ambient_temp = ambient.get_temperature()
# freezer_temp = freezer.get_temperature()
# fridge_temp = fridge.get_temperature()
# except:
# logging.exception("retry in %is because of: ", retry)
# time.sleep(1)
# control section
def produceData():
global current
"""
thread to aquire samples continuously
"""
file = open("/var/1w_files/log.csv", "a")
timestamp = time.time() - 5
light = gpio_sensor.Gpio("gpio27")
switch = gpio_sensor.Gpio("gpio22")
ambient = temp_sensor.TempSensor("28-0000052f7386")
freezer = temp_sensor.TempSensor("28-0000055fc26e")
fridge = temp_sensor.TempSensor("28-0000052f91b1")
while(True):
if (time.time()-timestamp) > 5.0 :
timestamp = time.time()
# grab temperature data. in case of error, retry after brief pause
#for retry in (5, 1):
try:
ambient_temp = ambient.get_temperature()
except Exception:
pass
#print("retry %is: ambient", retry)
#time.sleep(0.5)
#for retry in (5, 1):
try:
freezer_temp = freezer.get_temperature()
except Exception:
pass
#print("retry %is: ambient", retry)
#time.sleep(0.5)
#for retry in (5, 1):
try:
fridge_temp = fridge.get_temperature()
except Exception:
pass
#print("retry %is: ambient", retry)
#time.sleep(0.5)
light_state = light.get_value()
switch_state = switch.get_value()
FDefrost = freezer_temp >= 0.0 # defrost mode in freezer
FHigh = (freezer_temp < 0.0) & (freezer_temp > -12.0) # "high"
FLow = freezer_temp <= -12.0 # freezer temp is "low"
RHigh = fridge_temp > 6.0 # fridge temp is "high"
RBand = (fridge_temp <= 6.0) & (fridge_temp > 2.0) # "band"
RLow = fridge_temp <= 2.0 # fridge temp is "low"
Door = switch_state == 1
control = (FHigh & RBand) | RLow | Door
light_state = to_int(control)
light.put_value(light_state)
current = {
"time": timestamp,
"ambient": ambient_temp,
"freezer": freezer_temp,
"fridge": fridge_temp,
"light": light_state,
"switch": switch_state,
}
print("Producer: "),
print(current)
rrdtool.update("/var/1w_files/templog.rrd", \
"%d:%s:%s:%s:%s:%s" % (timestamp, \
ambient_temp, \
freezer_temp, \
fridge_temp, \
light_state, \
switch_state))
try:
q.get(False) # empty the old queue element
except Exception:
pass # queue was empty already
q.put(current, False) # insert new element
foo = ("%d,%s,%s,%s,%s\n") % ( current["time"], current["freezer"], current["fridge"], current["ambient"], current["light"] )
file.write(foo)
file.flush()
else:
time.sleep(0.05)
