| # Copyright (c) 2014 Adafruit Industries | |
| # Author: Tony DiCola | |
| # 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. | |
| from . import common | |
| from . import Test_Driver as driver | |
| def read(sensor, pin): | |
| # Get a reading from C driver code. | |
| result, humidity, temp = driver.read(sensor, pin) | |
| if result in common.TRANSIENT_ERRORS: | |
| # Signal no result could be obtained, but the caller can retry. | |
| return (None, None) | |
| elif result != common.DHT_SUCCESS: | |
| # Some kind of error occured. | |
| raise RuntimeError('Error calling DHT test driver read: {0}'.format(result)) | |
| return (humidity, temp) | |