65 lines
2.4 KiB
Python
65 lines
2.4 KiB
Python
#!/usr/bin/env python
|
|
#
|
|
# GrovePi Example for using the Grove Dust sensor(http://www.seeedstudio.com/depot/Grove-Dust-Sensor-p-1050.html) with the GrovePi
|
|
#
|
|
# The GrovePi connects the Raspberry Pi and Grove sensors. You can learn more about GrovePi here: http://www.dexterindustries.com/GrovePi
|
|
#
|
|
# Have a question about this example? Ask on the forums here: http://forum.dexterindustries.com/c/grovepi
|
|
#
|
|
'''
|
|
## License
|
|
|
|
The MIT License (MIT)
|
|
|
|
GrovePi for the Raspberry Pi: an open source platform for connecting Grove Sensors to the Raspberry Pi.
|
|
Copyright (C) 2017 Dexter Industries
|
|
|
|
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.
|
|
'''
|
|
|
|
# USAGE
|
|
#
|
|
# Connect the dust sensor to Port D2 on the GrovePi. The dust sensor only works on that port
|
|
# The dust sensor takes 30 seconds to update the new values
|
|
#
|
|
# It returns the LPO time, the percentage (LPO time divided by total period, in this case being 30000 ms)
|
|
# and the concentration in pcs/0.01cf
|
|
|
|
import time
|
|
import grovepi
|
|
|
|
print("Reading from the Grove Dust Sensor")
|
|
|
|
# default pin is 2 and default update period is 30000 ms
|
|
grovepi.dust_sensor_en()
|
|
|
|
time_to_run = 125 # 10 seconds
|
|
start = time.time() # current time in seconds
|
|
old_val = [0, 0.0, 0.0]
|
|
|
|
while start + time_to_run > time.time():
|
|
|
|
# defaults to pin 2
|
|
new_val = grovepi.dust_sensor_read()
|
|
if old_val[0] != new_val[0]:
|
|
print("LPO time = {:3d} | LPO% = {:5.2f} | pcs/0.01cf = {:6.1f}".format(*new_val))
|
|
old_val = new_val
|
|
|
|
# and disable the interrupt on pin 2
|
|
grovepi.dust_sensor_dis()
|