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si114x.py 2.1KB

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  1. #!/usr/bin/python
  2. # Author: Zion Orent <zorent@ics.com>
  3. # Copyright (c) 2015 Intel Corporation.
  4. #
  5. # Permission is hereby granted, free of charge, to any person obtaining
  6. # a copy of this software and associated documentation files (the
  7. # "Software"), to deal in the Software without restriction, including
  8. # without limitation the rights to use, copy, modify, merge, publish,
  9. # distribute, sublicense, and/or sell copies of the Software, and to
  10. # permit persons to whom the Software is furnished to do so, subject to
  11. # the following conditions:
  12. #
  13. # The above copyright notice and this permission notice shall be
  14. # included in all copies or substantial portions of the Software.
  15. #
  16. # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17. # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18. # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19. # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  20. # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  21. # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  22. # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23. import time, sys, signal, atexit
  24. import pyupm_si114x as upmSi114x
  25. # Instantiate a SI114x UV Sensor on I2C bus 0
  26. myUVSensor = upmSi114x.SI114X(0)
  27. ## Exit handlers ##
  28. # This stops python from printing a stacktrace when you hit control-C
  29. def SIGINTHandler(signum, frame):
  30. raise SystemExit
  31. # This function lets you run code on exit,
  32. # including functions from myUVSensor
  33. def exitHandler():
  34. print "Exiting"
  35. sys.exit(0)
  36. # Register exit handlers
  37. atexit.register(exitHandler)
  38. signal.signal(signal.SIGINT, SIGINTHandler)
  39. # First initialize it
  40. myUVSensor.initialize()
  41. print "UV Index Scale:"
  42. print "---------------"
  43. print "11+ Extreme"
  44. print "8-10 Very High"
  45. print "6-7 High"
  46. print "3-5 Moderate"
  47. print "0-2 Low\n"
  48. # update every second and print the currently measured UV Index
  49. while (1):
  50. # update current value(s)
  51. myUVSensor.update()
  52. # print detected value
  53. print "UV Index:", myUVSensor.getUVIndex()
  54. time.sleep(1)