2015-03-24 14:03:15 -06:00
|
|
|
#!/usr/bin/python
|
|
|
|
# Author: Zion Orent <zorent@ics.com>
|
|
|
|
# Copyright (c) 2015 Intel Corporation.
|
|
|
|
#
|
|
|
|
# Permission is hereby granted, free of charge, to any person obtaining
|
|
|
|
# a copy of this software and associated documentation files (the
|
|
|
|
# "Software"), to deal in the Software without restriction, including
|
|
|
|
# without limitation the rights to use, copy, modify, merge, publish,
|
|
|
|
# distribute, sublicense, and/or sell copies of the Software, and to
|
|
|
|
# permit persons to whom the Software is furnished to do so, subject to
|
|
|
|
# the following conditions:
|
|
|
|
#
|
|
|
|
# The above copyright notice and this permission notice shall be
|
|
|
|
# included in all copies or substantial portions of the Software.
|
|
|
|
#
|
|
|
|
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
|
|
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
|
|
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
|
|
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
|
|
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
|
|
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
|
|
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
|
|
|
|
|
|
import time, sys, signal, atexit
|
|
|
|
import pyupm_mhz16 as upmMhz16
|
|
|
|
|
|
|
|
# Instantiate a MHZ16 serial CO2 sensor on uart 0.
|
|
|
|
# This example was tested on the Grove CO2 sensor module.
|
|
|
|
myCO2 = upmMhz16.MHZ16(0)
|
|
|
|
|
|
|
|
|
|
|
|
## Exit handlers ##
|
|
|
|
# This stops python from printing a stacktrace when you hit control-C
|
|
|
|
def SIGINTHandler(signum, frame):
|
|
|
|
raise SystemExit
|
|
|
|
|
|
|
|
# This function lets you run code on exit,
|
|
|
|
# including functions from myCO2
|
|
|
|
def exitHandler():
|
|
|
|
print "Exiting"
|
|
|
|
sys.exit(0)
|
|
|
|
|
|
|
|
# Register exit handlers
|
|
|
|
atexit.register(exitHandler)
|
|
|
|
signal.signal(signal.SIGINT, SIGINTHandler)
|
|
|
|
|
|
|
|
|
|
|
|
# make sure port is initialized properly. 9600 baud is the default.
|
|
|
|
if (not myCO2.setupTty(upmMhz16.cvar.int_B9600)):
|
|
|
|
print "Failed to setup tty port parameters"
|
|
|
|
sys.exit(0)
|
|
|
|
|
|
|
|
print ("Make sure that the sensor has had "
|
|
|
|
"at least 3 minutes to warm up\n"
|
|
|
|
"or you will not get valid results.\n"
|
|
|
|
"The temperature reported is not the ambient temperature,\n"
|
|
|
|
"but rather the temperature of the sensor elements.")
|
|
|
|
|
|
|
|
time.sleep(1)
|
|
|
|
|
|
|
|
while(1):
|
2015-12-09 10:32:39 -05:00
|
|
|
if (not myCO2.getData()):
|
|
|
|
print "Failed to retrieve data"
|
|
|
|
else:
|
|
|
|
outputStr = ("CO2 concentration: {0} PPM, "
|
|
|
|
"Temperature (in C): {1}".format(
|
|
|
|
myCO2.getGas(), myCO2.getTemperature()))
|
|
|
|
print outputStr
|
2015-03-24 14:03:15 -06:00
|
|
|
|
|
|
|
time.sleep(2)
|