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rad.py
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rad.py
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#!/usr/bin/env python
import time
import httplib, urllib
import RPi.GPIO as GPIO
waitUntil = time.time() + 1
events = []
def upload():
cpm = str(float(len(events))/float(5))
params = urllib.urlencode({'field1': cpm})
headers = {
"X-THINGSPEAKAPIKEY": "YOUR_API_KEY",
"Content-Type": "application/x-www-form-urlencoded",
"Content-Length": str(len(params))
}
conn = httplib.HTTPConnection("api.thingspeak.com")
conn.request("POST", "/update", params, headers)
response = conn.getresponse()
if response.status == 200:
print 'upload'
else:
print 'upload fail'
data = response.read()
conn.close()
def radiationEventHandler (pin):
if time.time() >= waitUntil:
events.append(time.time())
def noiseEventHandler (pin):
waitUntil = time.time() + 1
for event in events:
current_time = time.time()
if event >= (current_time - 1) and event <= current_time:
try:
events.remove(event)
except:
pass
# main function
def main():
# tell the GPIO module that we want to use
# the chip's pin numbering scheme
GPIO.setmode(GPIO.BCM)
GPIO.setup(17, GPIO.IN)
GPIO.setup(17, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(18, GPIO.IN)
GPIO.setup(18, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.add_event_detect(17, GPIO.FALLING)
GPIO.add_event_callback(17, radiationEventHandler)
GPIO.add_event_detect(18, GPIO.FALLING)
GPIO.add_event_callback(18, noiseEventHandler)
# wait 5 mins before posting to thingspeak (data needs to stabilize)
loops = -270
# sleepy time
while True:
time.sleep(1)
for event in events:
if event < time.time() - 300:
events.remove(event)
print "cpm: " + str(float(len(events))/float(5))
loops = loops + 1
if (loops > 30):
loops = 0
try:
upload()
except:
pass
# done
GPIO.cleanup()
# start 'er up
if __name__=="__main__":
main()