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109 | #!/usr/bin/env python
#-----------------------------------------------------------------------------
# qwiic_ccs811_ex7.py
#
# Simple Example for the Qwiic CCS811 Device
#------------------------------------------------------------------------
#
# Written by SparkFun Electronics, May 2019
#
#
# More information on qwiic is at https://www.sparkfun.com/qwiic
#
# Do you like this library? Help support SparkFun. Buy a board!
#
#==================================================================================
# Copyright (c) 2019 SparkFun Electronics
#
# 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.
#==================================================================================
# Example 3
#
from __future__ import print_function
import qwiic_ccs811
import time
import sys
import random
# Define some error messages
_deviceErrors = { \
1 << 5 : "HeaterSupply", \
1 << 4 : "HeaterFault", \
1 << 3 : "MaxResistance", \
1 << 2 : "MeasModeInvalid", \
1 << 1 : "ReadRegInvalid", \
1 << 0 : "MsgInvalid" \
}
def runExample():
print("\nSparkFun CCS811 Sensor Example 3 - NTC data to CCS811 for compensation. \n")
mySensor = qwiic_ccs811.QwiicCcs811()
if mySensor.connected == False:
print("The Qwiic CCS811 device isn't connected to the system. Please check your connection", \
file=sys.stderr)
return
mySensor.begin()
while True:
humidityVariable = random.randrange(0, 10000)/100 # 0 to 100%
temperatureVariable = random.randrange(500, 7000) / 100 #5C to 70C
print("New humidity and temperature:")
print(" Humidity: %.2f percent relative" % humidityVariable)
print(" Temperature: %.2f degrees C" % temperatureVariable)
mySensor.set_environmental_data(humidityVariable, temperatureVariable)
if mySensor.data_available():
mySensor.read_algorithm_results()
print(" CO2:\t%.3f ppm" % mySensor.CO2)
print(" tVOC:\t%.3f ppb\n" % mySensor.TVOC)
elif mySensor.check_status_error():
error = mySensor.get_error_register();
if error == 0xFF:
# communication error
print("Failed to get Error ID register from sensor")
else:
strErr = "Unknown Error"
for code in _deviceErrors.keys():
if error & code:
strErr = _deviceErrors[code]
break
print("Device Error: %s" % strErr)
time.sleep(1)
if __name__ == '__main__':
try:
runExample()
except (KeyboardInterrupt, SystemExit) as exErr:
print("\nEnding Example")
sys.exit(0)
|