76 lines
3.5 KiB
Python
76 lines
3.5 KiB
Python
#!/usr/bin/env python
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#
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# GrovePi Example for using the Grove PIR Motion Sensor (http://www.seeedstudio.com/wiki/Grove_-_PIR_Motion_Sensor)
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#
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# The GrovePi connects the Raspberry Pi and Grove sensors. You can learn more about GrovePi here: http://www.dexterindustries.com/GrovePi
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#
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# Have a question about this example? Ask on the forums here: http://forum.dexterindustries.com/c/grovepi
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#
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'''
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## License
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The MIT License (MIT)
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GrovePi for the Raspberry Pi: an open source platform for connecting Grove Sensors to the Raspberry Pi.
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Copyright (C) 2017 Dexter Industries
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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'''
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# NOTE:
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# There are also 2x potentiometers on the board for adjusting measuring distance and hold time
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# Rotate the pot labelled "Delay time" clockwise to decrease the hold time (0.3s - 25s)
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# Rotate the pot labelled "Distance" clockwise to decrease the measuring distance (10cm - 6m)
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# There are multiple revisions of this board with different components for setting retriggerable/non-retriggerable.
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# Revision 1.0 contains a switch and revision 1.2 contains a jumper hat.
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# The 1.0 switch board is labelled with H,L - H=retriggerable, L=non-retriggerable.
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# The 1.2 jumper board has a pin diagram printed on the back.
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# retriggerable means the sensor will continue outputting high if motion was detected before the hold timer expires.
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# non-retriggerable means the sensor will output high for the specified hold time only, then output low until motion is detected again.
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# if there is constant motion detected, retriggerable will stay high for the duration and non-retriggerable will oscillate between high/low.
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import time
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import grovepi
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# Connect the Grove PIR Motion Sensor to digital port D8
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# NOTE: Some PIR sensors come with the SIG line connected to the yellow wire and some with the SIG line connected to the white wire.
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# If the example does not work on the first run, try changing the pin number
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# For example, for port D8, if pin 8 does not work below, change it to pin 7, since each port has 2 digital pins.
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# For port 4, this would pin 3 and 4
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pir_sensor = 8
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motion=0
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grovepi.pinMode(pir_sensor,"INPUT")
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while True:
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try:
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# Sense motion, usually human, within the target range
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motion=grovepi.digitalRead(pir_sensor)
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if motion==0 or motion==1: # check if reads were 0 or 1 it can be 255 also because of IO Errors so remove those values
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if motion==1:
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print ('Motion Detected')
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else:
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print ('-')
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# if your hold time is less than this, you might not see as many detections
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time.sleep(.2)
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except IOError:
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print ("Error")
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