As promised here’s the code I’ve currently got watching for incoming messages from the slice of pi. It’s a hacked up version of the script from
The code pulling from Weather Underground is gone and I’ve shuffled things around a bit for my purposes. No judging what I’ve done to the python if you please, I’m fresh in from years of abusing perl to meet my needs but have shifted to python for pi related stuff since solstice.
https://rockhopper.vom.org.uk/~mark/wirelessthing/monitor_sql.py
#!/usr/bin/env python
# --------------------------------------------------
from time import time, sleep, gmtime, strftime
import logging
import logging.handlers
import serial
import os
import os.path
import datetime
import sys
import MySQLdb as mdb
# --------------------------------------------------
# create table things (
# thistime timestamp,
# ID varchar(2),
# type varchar(10),
# value float );
# --------------------------------------------------
DEVICE = '/dev/ttyAMA0'
BAUD = 9600
ser = serial.Serial(DEVICE, BAUD)
TIMEOUT = 10
# --------------------------------------------------
my_logger = logging.getLogger('MyLogger')
my_logger.setLevel(logging.INFO)
handler = logging.handlers.SysLogHandler(address = '/dev/log')
my_logger.addHandler(handler)
#my_logger.debug('this is debug')
#my_logger.critical('this is critical')
# --------------------------------------------------
def dumpResults( thingMsg ):
print "Message : " + thingMsg
readValue = -100
readID = "99"
readType = "NONE"
writeMe = 0
# Raw mesg logging
thisTime = strftime("%Y-%m-%d %H:%M", gmtime())
my_logger.info( "%s,%s\n" % ( thisTime, thingMsg ) )
readID = thingMsg[1:3]
if thingMsg[3:7] == "TEMP":
writeMe = 1
readType = "TEMP"
readValue = thingMsg[7:]
if thingMsg[3:7] == "BATT":
writeMe = 1
readType = "BATT"
readValue = thingMsg[7:11]
if readValue == "LOW":
readValue = 0
if writeMe:
thisMsg = "%s,%s,%s,%s\n" % ( thisTime, readID, readType, readValue )
with open( "logfile.txt", "a", 0 ) as thisFile:
# Dump the information to file and setup the message
thisTime = strftime("%Y-%m-%d %H:%M:%S", gmtime())
thisFile.write( thisMsg )
print( thisMsg )
try:
con = mdb.connect('192.168.0.250', 'monitor', 'password', 'houseLogging');
with con:
# SQL stuff
cur = con.cursor()
cur.execute( "insert into things values ( '%s', '%s', '%s', %s )" % ( thisTime, readID, readType, readValue ) )
con.commit()
except mdb.Error, e:
print "Error %d: %s" % (e.args[0],e.args[1])
my_logger.critical( 'Could not write to db - '+thisMsg )
#sys.exit(1)
return( 1 )
def get_temp():
global ser
fim = time()+ TIMEOUT
my_logger.debug('Attempting to get temp')
while (time()<fim):
n = ser.inWaiting()
if n != 0:
data = ser.read(n)
nb_msg = len(data) / 12
print "Number of message blocks " + str(nb_msg)
for i in range (0, nb_msg):
msg = data[i*12:(i+1)*12]
print ">>" + msg
dumpResults( msg )
else:
sleep(5)
return {1}
# --------------------------------------------------
# main function
# This is where the program starts
def main():
while True:
temperature = get_temp()
#else:
# print ("temperature=ERROR-Timeout!")
if __name__=="__main__":
main()
# --------------------------------------------------