Thanks for the welcome day_tripper.Greetings, @Megapint ! And welcome to the forum!
I had missed your earlier posts, but having read them now I'm quite amazed and pleased that someone would even deal with that rats nest of mine.
Clearly, I'm not a coder
When you're happy with your changes if you could put the files somewhere I could pull from, that would be most excellent!
Cheers!
It is what I have used for the last 2 years, so at least I know the new measurements are consistent with what I am used to. The 6 sensors from ebay cost the same as one from a trusted supplier with the legitimate sensor.
#!/usr/bin/env python
import sqlite3
import os
import time
import glob
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)
comp_pin=25
GPIO.setup(comp_pin, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
#-------------------------------------------------------------------------------------------------------
# global variables
speriod=(15*60)-1
#speriod=(5*60)-1
dbname='/var/www/tempdata.db'
# adjustments for probes. values can be positive or negative.
adjch0=-1.1
adjch1=0
adjch2=0
adjch3=-1.3
adjch4=-1.3
# read bounds for probes, probe readings not within bounds will be retried
hibound=100
lobound=20
# high and low temperature values for plotting compressor state
comp_high=55
comp_low=45
comp=45
comp_state=0
compressor=45
#-------------------------------------------------------------------------------------------------------
# store the temperature in the database
def log_temperature(temp0,temp1,temp2,temp3,temp4,comp):
conn=sqlite3.connect(dbname)
curs=conn.cursor()
curs.execute("INSERT INTO temps values(datetime('now','localtime'), (?), (?), (?), (?), (?), (?))", (temp0,temp1,temp2,temp3,temp4,comp))
# commit the changes
conn.commit()
conn.close()
#-------------------------------------------------------------------------------------------------------
# display the contents of the database
def display_data():
conn=sqlite3.connect(dbname)
curs=conn.cursor()
for row in curs.execute("SELECT * FROM temps"):
print str(row[0])+" "+str(row[1])+" "+str(row[2])+" "+str(row[3])+" "+str(row[4])+" "+str(row[5])+" "+str(row[6])
conn.close()
#-------------------------------------------------------------------------------------------------------
# get status of compressor
# translate on/off to temperature values for charting
comp_state = GPIO.input(comp_pin)
if comp_state == 1:
compressor = comp_high
else:
compressor = comp_low
#-------------------------------------------------------------------------------------------------------
# get temperature
# returns None on error, or the temperature as a float
def get_temp(devicefile):
try:
fileobj = open(devicefile,'r')
lines = fileobj.readlines()
fileobj.close()
except:
return None
# get the status from the end of line 1
status = lines[0][-4:-1]
# Commented out this section and replaced with next section
# is the status is ok, get the temperature from line 2
#if status=="YES":
# print status
# tempstr= lines[1][-6:-1]
# tempvalue=float(tempstr)/1000
# print tempvalue
# return tempvalue
equals_pos = lines[1].find('t=')
if equals_pos != -1:
tempstr = lines[1][equals_pos+2:]
print tempstr
tempvalue_c=float(tempstr)/1000.0
print tempvalue_c
tempvalue_f = tempvalue_c * 9.0 / 5.0 + 32.0
print tempvalue_f
tempvalue = round(tempvalue_f,1)
print tempvalue
return tempvalue
else:
print "There was an error."
return None
#-------------------------------------------------------------------------------------------------------
# main function
# This is where the program starts
def main():
# enable kernel modules
os.system('sudo modprobe w1-gpio')
os.system('sudo modprobe w1-therm')
# search for a device file that starts with 28
devicelist = glob.glob('/sys/bus/w1/devices/28*')
if devicelist=='':
return None
else:
# append /w1slave to the device file
w1devicefile0 = devicelist[0] + '/w1_slave'
w1devicefile1 = devicelist[1] + '/w1_slave'
w1devicefile2 = devicelist[2] + '/w1_slave'
w1devicefile3 = devicelist[3] + '/w1_slave'
w1devicefile4 = devicelist[4] + '/w1_slave'
# while True:
# get the first temperature from the first device file
temperature0 = get_temp(w1devicefile0)+adjch0
if temperature0 != None and temperature0 > lobound and temperature0 < hibound:
print "temperature0="+str(temperature0)
else:
# Sometimes reads fail on the first attempt
# so we need to retry
temperature0 = get_temp(w1devicefile0)+adjch0
print "temperature0="+str(temperature0)
# get the second temperature from the second device file
temperature1 = get_temp(w1devicefile1)+adjch1
if temperature1 != None and temperature1 > lobound and temperature1 < hibound:
print "temperature1="+str(temperature1)
else:
# Sometimes reads fail on the first attempt
# so we need to retry
temperature1 = get_temp(w1devicefile1)+adjch1
print "temperature1="+str(temperature1)
# get the third temperature from the third device file
temperature2 = get_temp(w1devicefile2)+adjch2
if temperature2 != None and temperature2 > lobound and temperature2 < hibound:
print "temperature2="+str(temperature2)
else:
# Sometimes reads fail on the first attempt
# so we need to retry
temperature2 = get_temp(w1devicefile2)+adjch2
print "temperature2="+str(temperature2)
# get the fourth temperature from the fourth device file
temperature3 = get_temp(w1devicefile3)+adjch3
if temperature3 != None and temperature3 > lobound and temperature3 < hibound:
print "temperature3="+str(temperature3)
else:
# Sometimes reads fail on the first attempt
# so we need to retry
temperature3 = get_temp(w1devicefile3)+adjch3
print "temperature3="+str(temperature3)
# get the fifth temperature from the fifth device file
temperature4 = get_temp(w1devicefile4)+adjch4
if temperature4 != None and temperature4 > lobound and temperature4 < hibound:
print "temperature4="+str(temperature4)
else:
# Sometimes reads fail on the first attempt
# so we need to retry
temperature4 = get_temp(w1devicefile4)+adjch4
print "temperature4="+str(temperature4)
# Store the five temperatures in the database
log_temperature(temperature0,temperature1,temperature2,temperature3,temperature4,compressor)
# display the contents of the database
# display_data()
# time.sleep(speriod)
if __name__=="__main__":
main()
