changed temp parsing as didn't work below 10 deg C

.gitignore

@@ -0,0 +1,3 @@
+# Defaults
+nohup.out
+*.pyc

README.md

@@ -0,0 +1,21 @@
+# Raspberry Pi Temperature Logger
+
+This repo contains code for a Raspberry Pi temperature logger which uses SQLite to store data read from a DS18B20 sensor.  
+
+There are several scripts that can be used. You'll need to trigger regular temperature logging from a cron job
+
+## Scripts
+
+`check_results.py` - Use to check the DB contents
+
+`logger.py` - Used to log the temps into the DB, driven from a cron job
+
+`webgui.py` - Drives a webpage to visualise the results
+
+## Original info
+
+This was all created originally from this website (which seems to be offline currently):
+
+http://raspberrywebserver.com/cgiscripting/rpi-temperature-logger/building-an-sqlite-temperature-logger.html
+
+

check_results.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+
+# For checking the SQLlite DB
+
+import sqlite3
+import os
+import time
+import glob
+import datetime
+
+# global variables
+dbname='./colchester.db'
+
+
+# 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])
+
+    conn.close()
+
+
+# main function
+# This is where the program starts 
+def main():
+
+        # display the contents of the database
+        display_data()
+
+
+if __name__=="__main__":
+    main()
+
+
+
+

monitor.py → logger.py

@@ -1,24 +1,28 @@
 #!/usr/bin/env python
 
-import sqlite3
+# Logs the temp to the SQLlite DB
 
+import sqlite3
 import os
 import time
 import glob
+import datetime
 
 # global variables
 speriod=(15*60)-1
-dbname='/var/www/templog.db'
-
+dbname='/home/pi/rpi_temp_logger/colchester.db'
 
+# Timestamp must include local timezone
+def current_time():
+    ts = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
+    return ts
 
 # store the temperature in the database
 def log_temperature(temp):
 
     conn=sqlite3.connect(dbname)
     curs=conn.cursor()
-
-    curs.execute("INSERT INTO temps values(datetime('now'), (?))", (temp,))
+    curs.execute("INSERT INTO temps values( ?, ? )", (current_time(), temp))
 
     # commit the changes
     conn.commit()
@@ -55,10 +59,8 @@ def get_temp(devicefile):
 
     # 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
+        tempstr=lines[1].split("=")
+        tempvalue=float(tempstr[1])/1000
         return tempvalue
     else:
         print "There was an error."
@@ -83,30 +85,17 @@ def main():
         w1devicefile = devicelist[0] + '/w1_slave'
 
 
-#    while True:
-
     # get the temperature from the device file
     temperature = get_temp(w1devicefile)
-    if temperature != None:
-        print "temperature="+str(temperature)
-    else:
+    if temperature is None:
         # Sometimes reads fail on the first attempt
         # so we need to retry
         temperature = get_temp(w1devicefile)
-        print "temperature="+str(temperature)
 
-        # Store the temperature in the database
+    # Store the temperature in the database
     log_temperature(temperature)
 
-        # display the contents of the database
-#        display_data()
-
-#        time.sleep(speriod)
-
 
 if __name__=="__main__":
     main()
 
-
-
-